prEN 15434-1
(Main)Bonding sealants - Part 1: Bonded glazing sealants
Bonding sealants - Part 1: Bonded glazing sealants
This document covers the requirements for and testing of sealants for use in one or more of the following applications:
a) Manufacturing of insulating glass units where direct ultraviolet resistance and mechanical resistance (Bonding use) of the insulating glass edge seal are required.
b) Manufacturing of factory-made bonded sealant glazing elements when referred to by the relevant European Standards and/or European Technical Approval Guidelines.
c) Assembling of glass products into or onto supports, where also direct ultraviolet resistance and/or mechanical resistance (bonding use) of the seal are required, under controlled environmental conditions as described in EN 13022 2:2014, Clause 5.
NOTE 1 The required level of resistance to ultraviolet exposure will be dependent upon the chemistry of sealant. Reduced UV exposure testing is acceptable for proven silicone technologies. Extended UV exposure will be required for different technologies.
This document covers the evaluation of conformity and the factory production control with respect to the production of sealants in conformity with this document.
This document describes the role of sealants that are in conformity with this document, with respect to sealing and bonding.
This document does not apply to sealants for the manufacture of insulating glass units where the seal is fully protected, i.e. by a frame, from ultraviolet radiation.
NOTE 2 Sealants for this application comply with EN 1279 4.
This document contains other aspects of importance for trade.
Klebende Dichtstoffe - Teil 1: Klebende Dichtstoffe für Glaskonstruktionen
Dieses Dokument behandelt Anforderungen und Prüfung von Dichtstoffen für die Verwendung in einer oder mehreren der nachfolgenden Anwendungen:
a) Herstellung von Isolierverglasungen, wenn eine Beständigkeit gegen direkte UV Strahlung und/oder eine mechanische Festigkeit (geklebte Anwendung) des Randverbundes des Isolierglases erforderlich ist;
b) industrielle Fertigung von Elementen für geklebte Verglasungen, wenn in den entsprechenden Europäischen Normen und/oder ETAGs (Leitlinien für europäische technische Zulassungen) darauf verwiesen wird;
c) Einbau oder Montage von Glasprodukten in oder an Halterungen unter kontrollierten Umgebungsbedingungen, wenn ebenfalls eine Beständigkeit gegen direkte UV Strahlung und/oder eine mechanische Festigkeit (geklebte Anwendung) der Dichtung erforderlich ist, wie in EN 13022 2:2014, Abschnitt 5 beschrieben.
ANMERKUNG 1 Die erforderliche Beständigkeit gegen UV Strahlung hängt von den chemischen Eigenschaften des Dichtstoffes ab. Eine verkürzte Prüfung der Beständigkeit gegen UV Strahlung ist bei erprobten Silikontechnologien annehmbar. Für andere Technologien ist eine verlängerte Prüfung der Beständigkeit gegen UV Strahlung erforderlich.
Dieses Dokument behandelt die Konformitätsbewertung und die werkseigene Produktionskontrolle im Hinblick auf die Produktion von Dichtstoffen in Übereinstimmung mit diesem Dokument.
Dieses Dokument behandelt die Funktion der Dichtstoffe in Übereinstimmung mit diesem Dokument hinsichtlich Abdichtung und Verklebung.
Dieses Dokument gilt nicht für Dichtstoffe für die Herstellung von Mehrscheiben-Isolierglas, bei dem der Randverbund vor Beanspruchung durch UV Strahlung voll geschützt ist, z. B. durch einen Rahmen.
ANMERKUNG 2 Dichtstoffe für diese Anwendung entsprechen EN 1279 4.
Dieses Dokument enthält andere Gesichtspunkte, die für den Handel wichtig sind.
Mastics de collage - Partie 1 : Mastics de scellement et/ou de collage utilisés pour les vitrages extérieurs collés
Le présent document traite des exigences et des essais relatifs aux mastics de scellement et/ou de collage destinés à être utilisés dans une ou plusieurs des applications suivantes :
a) la fabrication de vitrages isolants pour lesquels une résistance à l’exposition directe aux UV et une résistance mécanique (fonction de maintien par collage) du scellement périphérique du vitrage isolant sont exigées ;
b) la fabrication d'éléments de vitrage extérieur collé réalisés en usine lorsque les Normes européennes applicables et/ou les guides d'agréments techniques européens pertinents y font référence ;
c) l'assemblage de produits verriers directement dans des supports ou sur ces derniers, lorsqu'une résistance à l’exposition directe aux UV et/ou une résistance mécanique (fonction de maintien par collage) sont également exigées, dans les conditions d’application contrôlées comme décrites dans l’EN 13022-2:2014, Article 5.
NOTE 1 Le niveau requis de résistance à l'exposition au rayonnement ultraviolet dépend de la composition chimique du mastic. Les essais d’exposition réduite aux UV sont acceptables pour les techniques éprouvées utilisant du silicone ; pour les autres, des essais d’exposition prolongée aux UV sont exigés.
Le présent document traite de l'évaluation de la conformité et du contrôle de la production en usine des mastics de scellement et/ou de collage fabriqués conformément à ce même document.Le présent document décrit la fonction des mastics de scellement et/ou de collage conformes à ce même document.
Le présent document ne s'applique pas aux mastics de scellement utilisés pour la fabrication de vitrages isolants comprenant une feuillure fermée protégeant parfaitement le mastic des rayonnements ultraviolets.
NOTE 2 Il convient que les produits de scellement destinés à ces applications soient conformes à l'EN 1279 4.
Le présent document contient d’autres aspects importants pour ce marché.
Tesnilne mase za lepljenje - 1. del: Tesnilne mase za lepljenje steklenih konstrukcij
General Information
RELATIONS
Standards Content (sample)
SLOVENSKI STANDARD
oSIST prEN 15434-1:2021
01-marec-2021
Tesnilne mase za lepljenje - 1. del: Tesnilne mase za lepljenje steklenih konstrukcij
Bonding sealants - Part 1: Bonded glazing sealantsKlebende Dichtstoffe - Teil 1: Klebende Dichtstoffe für Glaskonstruktionen
Mastics de collage - Partie 1 : Mastics de scellement et/ou de collage utilisés pour les
vitrages extérieurs collésTa slovenski standard je istoveten z: prEN 15434-1
ICS:
81.040.20 Steklo v gradbeništvu Glass in building
91.100.50 Veziva. Tesnilni materiali Binders. Sealing materials
oSIST prEN 15434-1:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 15434-1:2021
DRAFT
EUROPEAN STANDARD
prEN 15434-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2021
ICS 91.100.50; 81.040.20 Will supersede EN 15434:2006+A1:2010
English Version
Bonding sealants - Part 1: Bonded glazing sealants
Mastics de collage - Partie 1 : Mastics de scellement Klebende Dichtstoffe - Teil 1: Klebende Dichtstoffe für
et/ou de collage utilisés pour les vitrages extérieurs Glaskonstruktionencollés
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 349.If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 15434-1:2021 E
worldwide for CEN national Members.---------------------- Page: 3 ----------------------
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prEN 15431-1:2021 (E)
Contents Page
European foreword ............................................................................................................................................ 4
1 Scope .......................................................................................................................................................... 5
2 Normative references .......................................................................................................................... 5
3 Terms and definitions ......................................................................................................................... 6
4 Apparatus and substrates .................................................................................................................. 7
4.1 Substrate .................................................................................................................................................. 7
4.2 Spacers ...................................................................................................................................................... 7
4.3 Anti-adherent substrate ..................................................................................................................... 7
4.4 Tensile Test Machine ........................................................................................................................... 7
4.5 Separator and Clamps ......................................................................................................................... 7
4.6 Oven ........................................................................................................................................................... 7
4.7 Conditioning Chambers ...................................................................................................................... 7
4.8 Container ................................................................................................................................................. 7
4.9 Artificial light source ........................................................................................................................... 8
5 Requirements Sealant ......................................................................................................................... 8
5.1 General...................................................................................................................................................... 8
5.2 Identification .......................................................................................................................................... 8
5.2.1 Description .............................................................................................................................................. 8
5.2.2 General...................................................................................................................................................... 9
5.2.3 Thermogravimetric analysis ............................................................................................................ 9
5.2.4 Density ...................................................................................................................................................... 9
5.2.5 Hardness .................................................................................................................................................. 9
5.2.6 Change in volume or shrinkage ..................................................................................................... 10
5.2.7 Elastic modulus of the sealant ........................................................................................................ 10
5.2.8 Elastic recovery ................................................................................................................................... 10
5.2.9 Water vapour transmission and gas transmission rate ........................................................ 11
5.3 Mechanical characteristics .............................................................................................................. 11
5.3.1 General.................................................................................................................................................... 11
5.3.2 Initial Dynamic Tensile ..................................................................................................................... 11
5.3.3 Initial Dynamic Shear ........................................................................................................................ 12
5.3.4 Resistance to tearing ......................................................................................................................... 14
5.3.5 Fatigue test: dynamic tension cyclic load ................................................................................... 16
5.3.6 Creep under long term shear and cyclic tensile loading ...................................................... 17
5.3.7 Exposure to water with and without artificial light ............................................................... 19
5.3.8 Residual mechanical strength after ageing ............................................................................... 21
5.4 Compatibility with adjacent material .......................................................................................... 21
5.4.1 General.................................................................................................................................................... 21
5.4.2 Method without UV ............................................................................................................................. 22
5.4.3 Method with UV ................................................................................................................................... 22
6 Reaction to fire..................................................................................................................................... 24
7 Evaluation of conformity .................................................................................................................. 25
7.1 General or scope .................................................................................................................................. 25
7.2 Requirements ....................................................................................................................................... 25
7.2.1 Product description ........................................................................................................................... 25
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7.2.2 Conformity with the definition of sealant .................................................................................. 26
7.2.3 Determination of the characteristic’s performances ............................................................ 26
7.2.4 Functional durability......................................................................................................................... 30
Annex A (normative) Test sample description for testing mechanical characteristics ......... 31
Annex B (informative) Evaluation of mechanical tests results ....................................................... 32
B.1 Evaluation of the characteristic values R ............................................................................. 32
u,5B.2 Evaluation of the tangent modulus at the origin ..................................................................... 33
Bibliography ....................................................................................................................................................... 34
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European foreword
This document (prEN 15434-1:2021) has been prepared by Technical Committee CEN/TC 349 “Sealants
for joints in building construction”, the secretariat of which is held by AFNOR.This document is currently submitted to the CEN Enquiry.
This document will supersede EN 15434:2006+A1:2010.
Compared to the previous edition, the main changes are the following:
— clauses prepared for the purposes of the Construction Products Directive (CPD) were deleted;
— updated technically and improved editorially.This document is one part of the product European Standards within the framework series of EN 15434
on Bonding sealants, as follows:— Part 1: Bonded glazing sealants (this document);
— Part 2: Technical specification: Joint dimensioning calculation methods for Bonded glazing sealants for
direct UV exposure;— Part 3: Technical Requirement: Load combination calculation methods for Bonded Glazing Sealants for
direct UV exposure.This document (prEN 15434-1:2021) is one of a series of interrelated standard parts dealing with:
— glass products for bonded sealant glazing systems;— installation of glass products in a bonded manner on building façades;
— bonding sealants.
The interrelated parts are:
— EN 13022-1, Glass in building — Structural sealant glazing — Part 1: Glass products for bonded sealant
glazing systems for supported and unsupported monolithic and multiple glazing— EN 13022-2, Glass in building — bonded sealant glazing — Part 2: Assembly rules
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1 Scope
This document covers the requirements for and testing of sealants for use in one or more of the following
applications:a) Manufacturing of insulating glass units where direct ultraviolet resistance and mechanical resistance
(Bonding use) of the insulating glass edge seal are required.b) Manufacturing of factory-made bonded sealant glazing elements when referred to by the relevant
European Standards and/or European Technical Approval Guidelines.c) Assembling of glass products into or onto supports, where also direct ultraviolet resistance and/or
mechanical resistance (bonding use) of the seal are required, under controlled environmental
conditions as described in EN 13022-2:2014, Clause 5.NOTE 1 The required level of resistance to ultraviolet exposure will be dependent upon the chemistry of sealant.
Reduced UV exposure testing is acceptable for proven silicone technologies. Extended UV exposure will be required
for different technologies.This document covers the evaluation of conformity and the factory production control with respect to the
production of sealants in conformity with this document.This document describes the role of sealants that are in conformity with this document, with respect to
sealing and bonding.This document does not apply to sealants for the manufacture of insulating glass units where the seal is
fully protected, i.e. by a frame, from ultraviolet radiation.NOTE 2 Sealants for this application comply with EN 1279-4.
This document contains other aspects of importance for trade.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 572-1, Glass in building — Basic soda lime silicate glass products — Part 1: Definitions and general
physical and mechanical propertiesEN 572-2, Glass in building — Basic soda lime silicate glass products — Part 2: Float glass
EN 13022-1, Glass in building — Structural sealant glazing — Part 1: Glass products for structural sealant
glazing systems for supported and unsupported monolithic and multiple glazingEN 13022-2, Glass in building — Structural sealant glazing — Part 2: Assembly rules
EN ISO 527-3:2018, Plastics — Determination of tensile properties — Part 3: Test conditions for films and
sheets (ISO 527-3:2018)EN ISO 868:2003, Plastics and ebonite — Determination of indentation hardness by means of a durometer
(Shore hardness) (ISO 868:2003)EN ISO 1183-1:2019, Plastics — Methods for determining the density of non-cellular plastics —
Part 1: Immersion method, liquid pycnometer method and titration method (ISO 1183-1:2019, Corrected
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EN ISO 4892-2:2013, Plastics — Methods of exposure to laboratory light sources — Part 2: Xenon-arc
lamps (ISO 4892-2:2013)EN ISO 7389:2003, Building construction — Jointing products — Determination of elastic recovery of
sealants (ISO 7389:2002)EN ISO 8339:2005, Building construction — Sealants — Determination of tensile properties (Extension to
break) (ISO 8339:2005)EN ISO 9227:2017, Corrosion tests in artificial atmospheres — Salt spray tests (ISO 9227:2017)
EN ISO 10563:2017, Buildings and civil engineering works — Sealants — Determination of change in mass
and volume (ISO 10563:2017)EN ISO 11358-1:2014, Plastics — Thermogravimetry (TG) of polymers — General principles (ISO 11358-
1:2014)ISO 16269-6:2014, Statistical interpretation of data — Part 6: Determination of statistical tolerance
intervals3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN ISO 11600, EN 13022-1,
EN 13022-2, EN 1279-1, EN ISO 6927, and the following apply.ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp— IEC Electropedia: available at http://www.electropedia.org/
3.1
cure
irreversible transformation of a sealant from a liquid or paste-like state into a hardened or rubber-like
solid state3.2
initial cure
stage in the curing where sealant has appropriate cohesive strength to resist to different levels of
action/loads3.3
bonding
transfer of imposed loads (permanent or variable actions) to the support frame
3.4
significant change
variation in performance beyond the permitted tolerance for the characteristic
3.5
sealing
making gas and water tight
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3.6
bonding
joining elements
3.7
type of failure
type of rupture or loss of adhesion between bonded substrates. The type can be cohesive (in the mass of
the sealant), adhesive, boundary. EN ISO 10365 gives pattern examples of adhesive and cohesive ruptures
patterns4 Apparatus and substrates
4.1 Substrate
For preparation of the specimens as defined in Annex A. The substrate material shall be flat float glass in
accordance with EN 572-1 and EN 572-2 to be used as standard glass substrate unless otherwise
indicated in the various clauses.4.2 Spacers
Cross section (12 mm x 12 mm) with anti-adherent surface.
4.3 Anti-adherent substrate
For the preparation of the test specimens, e.g. polyethylene (PE) film, according to the advice of the
sealant manufacturer (see EN ISO 8339:2005, 5.3).4.4 Tensile Test Machine
A test machine with recording device, for direct pull tensile force test at a rate of (5,5 ± 0,5) mm/min and
with suitable capacity and sensitivity for the tests.4.5 Separator and Clamps
Clamps with appropriate dimensions to hold the test specimens extended or compressed to various % of
the original width or any other width agreed between the parties concerned. The fitting should not exert
any bending force (axial movement only).4.6 Oven
Air circulating oven with mechanical ventilation (open valve), capable of controlling the temperature to
within ± 2 °C.4.7 Conditioning Chambers
Conditioning chamber suitable for controlling the temperature to (60 ± 2) °C and RH to (85 ± 10) %.
Cold Chamber capable of controlling the temperature to (−20 ± 2) °C or optionally (−40 ± 2) °C or
(−30 ± 2) °C.Artificial ageing chamber capable of exposing test pieces to water and radiation.
4.8 ContainerFor immersing test specimens in distilled water for conditioning according to method B.
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4.9 Artificial light source
The artificial Fluorescent UV light source shall be of type Xenon lamps (EN ISO 4892-2:2013) or
equivalent. The total energy of the lamp is (500 ± 50) W/m and a temperature at the level of the surface
of the test specimen shall be of (60 ± 3) °C. Black panel thermometer shall be used with a blackened
absorbing metal plate that approximates the absorption characteristics of a “black body”. The plate shall
be at least 1 mm thick and of a size to fit the test specimen holders. The temperature of the metal plate is
measured by a suitable thermometer or thermocouple with good thermal contact. For measuring the test
temperature, it shall be mounted in a test specimen holder with the blackened side of the metal plate
facing the artificial light source. Readings shall only be taken after sufficient time has elapsed for the
temperature to become steady. The temperature shall be controlled by adjusting the air exchange rate.
Temperature control may be achieved by means of a thermostat, the sensor of which is placed in the
climate chamber. The power is (60 ± 5) W/m2 measured at the level of the sample, and between 300 and
400 nm. The irradiance shall not vary by more than ± 10 % over the whole specimen exposure area. The
temperature of the chamber is (60 ± 2) °C.5 Requirements Sealant
5.1 General
For conformity purposes, the sealant manufacturer shall describe the product in a product description,
which will be part of the factory production control documentation, or of the quality insurance system,
whichever is applied.Disclosure of the product description is entirely at the discretion of the sealant manufacturer or his agent.
The product description shall contain at least a normative part and may contain an informative part when
the manufacturer foresees further development of the product.The product description shall be prepared under the responsibility of the sealant manufacturer or his
agent.Sealants are described by the tests given in 5.2, 5.3 and 5.4. The same conditioning procedure shall be
used in all relevant test methods except where mentioned.5.2 Identification
5.2.1 Description
The description consists of three sub parts:
1) Component description:
Name and/or type of the sealant, together if it concerns a mono or a multiple components sealant. In
the case of a multiple components sealants, the mixing ratio and the tolerances of the mixing ratio
within which the performances of the characteristics and properties do not change significantly;
2) Initial cure information:relevant data (or figure or values) depending on the temperature and the relative humidity, the
chemistry of the curing system, number of components, section of the sealant to be applied, the
nature of the adhesion surfaces …;3) Cured sealant description:
list of identification test results in accordance with 5.2 in order to ensure no significant change in the
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The definition of product families shall be consistent with the normative part of the product description.
The substitution of raw materials or change in the process shall maintain the conformity with the product
description. The substituting material can be added to the product family and also the product
description when compliance has been demonstrated.5.2.2 General
All tests of 5.2 except 5.2.6 are carried out on cured products. When no conditioning procedure (cure)
has explicitly been stated by the sealant manufacturer, use only method A or method B as described in
EN ISO 8339:2005. For multiple components sealants the tests shall be performed at the nominal mixing
ratio as defined in 5.2.5.2.3 Thermogravimetric analysis
The determination of the thermogravimetric analysis shall be done following EN ISO 11358-1:2014, 8.2,
“Temperature scanning mode” according to the following specific conditions:— conditioning before testing: at least 1 day at standard laboratory conditions;
— purging gas: nitrogen and synthetic air respectively, with flow rate approximately 100 ml/min,
depending on equipment;— sample size: approximately 50 mg;
— heating rate: 20 K/minute;
— heating mode: heating up from 40 °C to minimum 900 °C in nitrogen flow, then 10 min isotherm at
900 °C in synthetic air flow.The rate of heating shall not change during significant weight loss. In cases where the given method
departs from this requirement, the method shall be adapted to prevent this.Number of test specimens: 1.
Evaluation:
— oxidative or non-oxidative conditions;
— curve and the first derivate of the curve;
— the percentage of cumulative losses up to 900 °C;
— zones of maximum loss through volatilisation;
— exo- or endothermic conversion zones.
5.2.4 Density
The determination of the density on three specimens shall be in accordance with EN ISO 1183-1:2019.
5.2.5 HardnessThe determination of the indentation hardness shall be in accordance with EN ISO 868:2003. The test
shall be performed on the cured sealant after (28 ± 3) days for single component sealant and after seven
days for two-component sealants.At least three samples shall be tested and five measurements taken per sample. The mean value and
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5.2.6 Change in volume or shrinkage
The aim of this test is to evaluate the degree of change of volume or shrinkage of the bonding sealants to
limit the initial stresses in the bonding joints. The test shall be carried out on three samples in accordance
with EN ISO 10563:2017 using a mechanically ventilated oven. Shrinkage shall be less than 10 %.
5.2.7 Elastic modulus of the sealantThe aim of this test is to determine a linear approximation of the Young modulus E.
The test shall be carried out on five test samples prepared in conformity with EN ISO 527-3:2018 with all
the dumbbell test specimens having a thickness of (2,2 ± 0,2) mm. Speed of the traction:
(5,5 ± 0,5) mm/min.The manufacturer provides the modulus type to be introduced in the calculation, either tangent (see
Annex B.2) or secant. In the latter case, the boundaries of the displacement-stress curve (ε ,σ ) and (ε ,σ ),
1 1 2 2between which the calculation modulus is to be performed shall also be given. The maximum relative
displacement shall be that corresponding to the upper boundary used to determine the calculation
modulus.As a function of the type of curve obtained (a, b, c, d according to EN ISO 527-3:2018, Figure 1), the
following pairs of values will be given (ε ,σ ), (ε ,σ ), (ε ,σ ), (ε ,σ ), (ε ,σ ). The calculation modulus is
1 1 2 2 m m y y B Bgiven by
σσ−
εε−
The test report shall contain the graphs (displacement, stress) for each sample tested. The report shall
mention the type (secant or tangent) of the Young modulus as well as the boundaries used for the
calculation of the modulus.5.2.8 Elastic recovery
The purpose of the test is to evaluate the elastic recovery behaviour and consequently the relaxation
behaviour after long term loading.The test shall be carried out on three test specimens in accordance with EN ISO 7389:2003, method A
with 25 % elongation. Adapted equipment should be used to ensure adequate accuracy of measurement
better than or equal to 0,1 mm.Record and calculate:
— the initial width L in mm between the contact surfaces after conditioning;
— the width after extension L in mm between the contact surfaces;
— the width L in mm between the contact surfaces 24h after unloading the test specimens and 1 h in
the unloaded condition at room temperature.— The elastic recovery R = (L –L )/(L –L ) × 100. The elastic recovery result of each specimen should
1 2 1 0be rounded to the closest 1 %.
— The mean elastic recovery is the mathematical average of the elastic recoveries of each test specimen
rounded to the closest 1 %.— The elastic recovery shall be > 95 %.
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5.2.9 Water vapour transmission and gas transmission rate
For sealants intended to be used in insulating glass unit edge seals this information can be made available.
These properties are determined for a membrane of 2 mm thickness in accordance with EN 1279-4:2018.
5.3 Mechanical characteristics5.3.1 General
For determining the mechanical properties, the tests are to be carried out on test specimens prepared
according to Annex A and cured (initial cure) according to EN ISO 8339:2005 (Method A or B).
The pulling system is made of a static and a mobile part which are connected to the sample holder. This
system allows for:— centralization (alignment) of a sample on the testing machine and maintains it throughout the
duration of the test;— displacement at constant speed of (5,5 ± 0,5) mm/min of the mobile part versus the static part;
— accurate measurement of the force within ± 1 %;— accurate measurement of the relative displacement of the two parts of the testing machine to the
nearest 0,1 mm;— recording of a stress-strain curve.
The system is illustrated in Figure 1 for tension.
The rigidity modulus and shear strength R are determined according to Annex B
u,5
When determining the classification of a bonding sealant according to the requirements of this standard,
the same conditioning procedure shall be used in all relevant test methods. The same batch of sealant
(and primer, if used) shall be used in all tests. The same substrates (material and surface finish) shall be
used in all tests. Tests shall be performed on glass according to EN 572-1 and EN 572-2.
5.3.2 Initial Dynamic TensileThe aim of this test is to evaluate the resistance of the bonding sealant to the tensile forces acting on the
joints.Key
b width of the bead
l length of the bead
e thickness of the bead
Figure 1 — Example of tension induced in the test specimen
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Afte
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