SIST EN 1279-4:2018

Glass in Building - Insulating Glass Units - Part 4: Methods of test for the physical attributes of edge seal components and inserts

This document specifies the requirements and describes the test methods for edge seal components and inserts. This includes the identification, the determination of physical attributes and the evaluation of characteristics for use in substitution rules in accordance with EN 1279 1:2018.
For the purpose to demonstrate that edge seal components will allow the insulating glass unit to conform to the requirements given in EN 1279 1:2018, Clause 6, EN 1279 2:2018 and EN 1279 3:2018 also apply.

Glas im Bauwesen - Mehrscheiben-Isolierglas - Teil 4: Verfahren zur Prüfung der physikalischen Eigenschaften der Komponenten des Randverbundes und der Einbauten

Diese Europäische Norm legt die Anforderungen an die Komponenten des Randverbunds und Einbauten fest und beschreibt ihre Prüfverfahren. Dies schließt die Identifizierung, die Bestimmung der physikalischen Merkmale und die Bewertung der Eigenschaften zur Anwendung der Austauschregeln in Übereinstimmung mit EN 1279-1:2018 ein.
Um nachzuweisen, dass die Komponenten des Randverbundes dazu geeignet sind, die Übereinstimmung des damit gefertigten Mehrscheiben-Isolierglases (MIG) mit den Anforderungen nach EN 1279-1:2018, Abschnitt 6, zu ermöglichen, sind EN 1279-2:2018 und EN 1279-3:2018 ebenfalls anzuwenden.

Verre dans la construction - Vitrage isolant préfabriqué scellé - Partie 4 : Méthodes d'essai des propriétés physiques des composants et inserts

Steklo v gradbeništvu - Izolacijsko steklo - 4. del: Preskusne metode za fizikalne lastnosti komponent robnega tesnjenja in vgrajenih delov

Ta evropski standard določa zahteve in preskusne metode za robno tesnjenje in vgrajene dele. To zajema identifikacijo, določanje fizičnih lastnosti in oceno lastnosti za uporabo pri pravilih o zamenjavi v skladu s standardom prEN 1279-1:2015.
Za dokazovanje, da komponente za robno tesnjenje omogočajo izolacijskemu steklu skladnost z zahtevami, opredeljenimi v točki 6 standarda prEN 1279-1:2015, se uporabljata tudi standarda prEN 1279-2:2015 in prEN 1279-3:2015.

General Information

• Status: Published
• Public Enquiry End Date: 29-Sep-2015
• Publication Date: 05-Sep-2018
• ICS: 81.040.20 - Glass in building
• Technical Committee: STV - Steklo, svetloba in razsvetljava v gradbeništvu
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 02-Aug-2018
• Due Date: 07-Oct-2018
• Completion Date: 06-Sep-2018
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Directive: 88/609/EEC - Limitation of emissions of certain pollutants into the air from large combustion plants
• Mandate: M/135 - Mandate to CEN/CENELEC concerning the execution of standardization work for harmonized standards on flat glass, profiled glass and glass block products
• Mandate: M/135_AM1 - First amendment to mandate M/135 - Mandate to CEN/CENELEC concerning the execution of standardisation work for harmonised standards on glass
• Ref Project: EN 1279-4:2018 - Glass in Building - Insulating Glass Units - Part 4: Methods of test for the physical attributes of edge seal components and inserts

Relations

• Replaces: SIST EN 1279-4:2004 - Glass in building - Insulating glass units - Part 4: Methods of test for the physical attributes of edge seals
• Effective Date: 01-Aug-2018

Overview

SIST EN 1279-4:2018 - Glass in Building - Insulating Glass Units - Part 4 - specifies test methods and requirements for the physical attributes of edge seal components and inserts used in insulating glass units (IGUs). The standard covers identification, physicochemical characterization and performance evaluation of sealants, desiccants (bulk and incorporated in spacers), preformed flexible spacers, and polymeric inserts. It supports the substitution rules and performance criteria referenced in EN 1279‑1:2018, and is used alongside EN 1279‑2:2018 and EN 1279‑3:2018 to demonstrate IGU conformity.

Key topics and technical requirements

The standard defines methods of test and reporting formats for a range of physical attributes (examples listed in the standard):

• Sealants
  • Physicochemical characterization, adhesion tests (including adhesion on coatings and metallic edge seals)
  • Measurement methods for Water Vapour Transmission Rate (WVTR) and Gas Permeation Rate (GPR)
  • Volatile content and additional sealant properties relevant to long‑term IGU durability
• Desiccants (bulk)
  • Identification techniques (XRF, XRD), loss on ignition (LOI), bulk density, and Available Water Adsorption Capacity (AWAC)
  • Determination of standard moisture adsorption capacity (Tc) and gas desorption behaviour
• Preformed flexible spacers with desiccant
  • Identification and moisture adsorption parameters (To, Tc)
• Polymeric inserts and matrices
  • Moisture content determination (Karl‑Fischer and gravimetric methods), volatile content and fogging tests
• Ancillary test procedures
  • Fogging evaluation, adhesion on coatings, sample preparation for WVTR/GPR, and test report requirements

Practical applications and users

SIST EN 1279‑4:2018 is essential for:

• IGU manufacturers specifying and verifying edge seal systems, spacers and desiccants
• Material suppliers (sealant, spacer and desiccant producers) for product characterization and datasheets
• Testing laboratories & certification bodies performing WVTR, GPR, LOI, AWAC, fogging and adhesion tests
• Façade engineers, architects and specifiers who require documented durability and compatibility data for glazing systems
• Quality managers implementing substitution rules per EN 1279‑1 for production control

Using these standardised test methods ensures consistent, reproducible assessment of edge seal components - critical for IGU durability, gas retention and prevention of moisture‑related failures.

Related standards

• EN 1279‑1:2018 - Generalities and substitution rules
• EN 1279‑2:2018 - Long‑term moisture penetration tests
• EN 1279‑3:2018 - Long‑term gas leakage and concentration tolerance tests

Keywords: insulating glass units, edge seal components, desiccants, WVTR, GPR, EN 1279‑4:2018, sealants, spacer, fogging, test methods.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Steklo v gradbeništvu - Izolacijsko steklo - 4. del: Preskusne metode za fizikalne lastnosti komponent robnega tesnjenja in vgrajenih delovGlas im Bauwesen - Mehrscheiben-Isolierglas - Teil 4: Verfahren zur Prüfung der physikalischen Eigenschaften der Komponenten des Randverbundes und der EinbautenVerre dans la construction - Vitrage isolant préfabriqué scellé - Partie 4 : Méthodes d'essai des propriétés physiques des composants et insertsGlass in Building - Insulating Glass Units - Part 4: Methods of test for the physical attributes of edge seal components and inserts81.040.20Steklo v gradbeništvuGlass in buildingICS:Ta slovenski standard je istoveten z:EN 1279-4:2018SIST EN 1279-4:2018en,fr,de01-oktober-2018SIST EN 1279-4:2018SLOVENSKI
STANDARDSIST EN 1279-4:20041DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 1279-4
July
t r s z ICS
z sä r v rä t r Supersedes EN
s t y {æ vã t r r tEnglish Version
Glass in Building æ Insulating Glass Units æ Part
vã Methods of test for the physical attributes of edge seal components and inserts Verre dans la construction æ Vitrage isolant préfabriqué scellé æ Partie
v ã Méthodes d 5essai des propriétés physiques des composants et inserts
Glas im Bauwesen æ MehrscheibenæIsolierglas æ Teil
vã Verfahren zur Prüfung der physikalischen Eigenschaften der Komponenten des Randverbundes und der Einbauten This European Standard was approved by CEN on
{ March
t r s zä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Rue de la Science 23,
B-1040 Brussels
t r s z CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s t y {æ vã t r s z ESIST EN 1279-4:2018

(Tc) . 17 6.3.3 Gas desorption . 17 6.4 Additional requirements . 17 6.5 Report for desiccants in bulk . 17 7 Requirements for preformed flexible spacer incorporating desiccant . 19 7.1 General . 19 7.2 Physicochemical characterization . 19 7.2.1 Identification . 19 7.2.2 Tc and To values . 19 7.3 Additional requirements . 20 7.4 Report . 20 8 Requirements for inserts containing polymer materials . 20 8.1 General . 20 8.2 Water content . 20 SIST EN 1279-4:2018

Adhesion test for outer sealants and metal edge seals . 21 A.1 Outer sealants . 21 A.2 Metallic edge seals . 25 Annex B (normative)
Adhesion on coatings and interlayer adhesion of coatings . 27 B.1 General . 27 B.2 Composition of coatings . 27 B.3 Evaluation . 27 B.4 Test report . 29 Annex C (normative)
Fogging test . 32 C.1 General . 32 C.2 Principle of the test . 32 C.3 Test conditions . 32 C.4 Visual inspection and requirements . 32 C.5 Exposure equipment . 33 C.6 Test report . 33 Annex D (normative)
Methods of water vapour transmission rate and gas permeation rate determination . 37 D.1 Method for determination of water vapour transmission rate (WVTR) . 37 D.2 Method for determination of gas permeation rate (GPR) . 40 Annex E (normative)
Test methods for desiccants in bulk . 43 E.1 Determination of loss on ignition LOIá Ti and Tf (at 540 °C) . 43 E.2 Determination of available water adsorption capacity (AWAC) . 44 E.3 Calculation of the standard moisture adsorption capacity (Tc) . 46 E.4 Determination of gas desorption . 46 E.5 Bulk density . 48 Annex F (normative)
Karl Fischer method for determination of moisture content of polymeric matrices incorporating desiccant . 51 F.1 General . 51 F.2 Materials and apparatus . 51 F.3 Preparatory work . 51 F.4 Determination of moisture content Toá Ti and Tf . 52 F.5 Determination of standard moisture adsorption capacity Tc . 53 F.6 Accuracy of the method . 53 SIST EN 1279-4:2018

Gravimetric method for determination of moisture content of polymeric matrices incorporating desiccant . 54 G.1 General . 54 G.2 Materials and apparatus . 54 G.3 Determination of Toá Tiá Tf and Tc . 54 Annex H (normative)
Volatile content test . 56 H.1 General . 56 H.2 Principle of the test . 56 H.3 Apparatus . 56 H.4 Test samples . 56 H.5 Test procedure . 56 H.6 Test report . 57 Annex I (informative)
Example of a sun simulating radiation source . 58 Annex J (informative)
Sealant sheet preparation for WVTR and GPR measurements . 59 J.1 Preparation of sheets . 59 J.2 Method 1 . 59 J.3 Method 2 . 59 J.4 Evaluation of sheet . 60 Bibliography . 61
IEC Electropedia: available at http://www.electropedia.org/
ISO Online browsing platform: available at http://www.iso.org/obp SIST EN 1279-4:2018

® m «2
® d «1 Pm Mass permeation rate g
® m «2
® d «1 Tc Standard moisture adsorption capacity % by weight TO Moisture content of preformed flexible spacer incorporated desiccant % by weight Ti Initial moisture content % by weight Tf Final moisture content % by weight V Volume (of gas) ml W Weight g W Difference in weight g T=Difference in temperature K PH20 Difference in water vapour pressure across the test sample % Pm Mean error of the mass permeation rate dimensionless =Elongation (of the bond due to mechanical loading) % C Crossover elongation % B Elongation at break %
Density kg
® m «3 =Stress (applied to the bond due to mechanical loading) MPa s Tensile strength MPa c Crossover stress MPa x Ratio dimensionless SIST EN 1279-4:2018

Key
is stress, in MPa A=reference value in
is elongation, in % B=reference value in
Figure 1 — Strength requirement for outer sealant If IGU manufacturer performs the sealing operation on a coated glass without deletion of the coating, a test report in accordance with Annex B shall be obtained. SIST EN 1279-4:2018

Date ……………………. Insulating glass units - Sealant properties Client Name: …………………………………………………………………………….
Legal Address: ……………………………………………………………………………. Manufacturer Name: …………………………………………………………………………….
Plant Address: ……………………………………………………………………………. Sealant Function: (e.g. outer sealant) …………………………………………………………………………….
Trade name: …………………………………………………………………………….
Polymer base: (e.g. polysulphide) …………………………………………………………………………….
Batch number: Part A …………………………………………………………………. Part B (if applicable) …………………………………………….
Mix ratio volume …………………………………………………………………. weight …………………………………………………………………. Results in accordance with EN 1279-4:2018 Physicochemical characterization (EN 1279-4:2018á 5.2) Volume shrinkage Sealant
= 1,1 % Infrared spectrum Cured sealant
Density / specific gravity Cured sealant
= 1,76 g/cm3 Outer sealant strength (EN 1279-4:2018á 5.3) Initial test (series 1) Adhesive bond (float glass-sealant-float glass) pass (c = (0,38 ± 0C = ….) After exposure to UV, temperature and moisture (series 2) Adhesive bond (float glass-sealant-float glass) pass (c = (0,41 ± 0,023) MPa) After immersion in water (series 3) Adhesive bond (float glass-sealant-float glass) pass (c = (0,37 ± 0,025) MPa) Characteristics for the substitution of sealants (EN 1279-4:2018á 5.5) Crossover stress (of series 1) Adhesive bond (float glass-sealant-float glass) c = (0,38 ± 0,02) MPa Water vapour transmission rate Sealant sheet (thickness = 2 mm) WVTR = 5,2 g
® m «2
® d «1 Gas permeation rate Sealant sheet (thickness = 2 mm) GPR = 2,5 g
® m-2
® d «1 Additional results may be included, e.g. volatile content, fogging tests (subclause 5.4) and stress/strain curve (Annex A) Comments
Name / Signature
AWAC vs LOI 540 °C Key x AWAC (% (w/w)) x LOI 540 °C (% (w/w))
y AWAC (% (w/w)) Figure 2 — Example of correlation for
¿T vs AWAC and AWAC vs LOI performance comparison of different desiccants. SIST EN 1279-4:2018

(Tc) The standard moisture adsorption capacity shall be determined in accordance with Annex E, E.3. 6.3.3 Gas desorption Desiccant supplied to the IGU manufacturer shall have a gas desorption less than 0,3 ml/g when measured in accordance with Annex E. 6.4 Additional requirements Moisture penetration test report in accordance with EN 1279-2 for the desiccant shall be available on request. The quantity of desiccant used for testing shall be given in the report. 6.5 Report for desiccants in bulk The test report shall provide detailed information on performed tests including the physicochemical characterization (see Table 4 as an example). SIST EN 1279-4:2018

Date ……………………. Insulating glass units - Desiccant (in bulk) properties Client Name: …………………………………………………………………
Legal Address: ……………………………………………………………………………. Manufacturer Name: …………………………………………………………………………….
Plant Address: ……………………………………………………………………………. Desiccant Function: (e.g. desiccant in bulk) …………………………………………………………………………….
Trade name: …………………………………………………………………………….
Bead size: …………………………………………………………………………….
Batch number: ……………………………………………………………………………. Results in accordance with EN 1279-4:2018 Physicochemical characterization (EN 1279-4:2018á 6.2) X-ray Fluorescence Spectroscopy (XRF) Al2O3, SiO2, Na2O3, K2O, CaO, MgO X-ray Diffraction (XRD)
= (41 ± 2) °C Available Water Adsorption Capacity (AWAC) AWAC = (16,1 ± 0,5) % by weight Performance requirements (EN 1279-4:2018á 6.3) Loss on Ignition (LOI at 540 °C) Pass (LOI
= (1,2 ± 0,1) % by weight) Standard moisture adsorption capacity (Tc) (17,3 ± 0,2) % by weight Gas desorption Pass (Vgas = 0,23 ml /g) Comments
Name / Signature
7 Requirements for preformed flexible spacer incorporating desiccant 7.1 General Preformed flexible spacer incorporating desiccant can be either hot-applied flexible spacer, prefabricated flexible spacer or desiccant matrix (see EN 1279-1:2018). Preformed flexible spacer incorporating desiccants have to provide enough water adsorption capacity to ensure that no condensation in IGU occurs under the given level of moisture penetration across the edge seal. In case there is no rigid spacer and no inner seal components in the IGU, preformed flexible spacer incorporating desiccants shall fulfil the relevant requirements set in this standard for spacers and inner sealants respectively. Supplier of preformed flexible spacer incorporating desiccants shall maintain test report(s) issued in accordance with 7.4. The required test reports shall contain test results for characteristics specified in 7.2. 7.2 Physicochemical characterization 7.2.1 Identification Polymeric matrix incorporating desiccants shall be identified with infrared spectrum, thermogravimetric analysis and density as specified in 5.2. 7.2.2 Tc and To values Tc and To shall be determined in accordance with the relevant method described in Annex F or Annex G and declared together with reference to the used testing method. For the desiccants with the matrix decomposition temperature lower than water desorption temperature, gravimetric method in accordance with Annex G shall be applied. For all other desiccants incorporated in polymeric matrix the Karl-Fischer method in accordance with Annex F shall be used. SIST EN 1279-4:2018

from the current type test report for an IGU design in EN 1279-2:2018, 6.5. The amount of water introduced by the insert shall be calculated and an additional quantity of desiccant shall be added to compensate. The water content, volatile content and fogging test shall be carried out whenever a material composition of the relevant insert has been changed (see also EN 1279-1:2018, D.3). 8.2 Water content The insert shall be stored for at least 7 days in standard laboratory conditions. The test sample shall be weighed to an accuracy of less than 0,5 % of its weight. The water content has to be determined by using Karl-Fischer method in accordance with Annex F. Water content shall be declared in % of the initial weight. 8.3 Volatile content Volatile content shall be determined in accordance with Annex H. 8.4 Fogging Fogging test for IGU containing the insert placed in the heated area shall be performed in accordance with Annex C. Adhesive inserts, e.g. lead, sticking to the glass should not be attached to the same pane as the cold plate. 8.5 Report The test report shall include trade name of the tested insert, date of test, weight of the tested insert sample, water content, volatile content and the result of fogging test. The test report shall contain at least a description of the insert or spacer (composition, painted/massive,…) and include a general part providing relevant performance values like volume shrinkage, IR spectrum, TGA graph and/or density characteristics of Figure 2. SIST EN 1279-4:2018

Adhesion test for outer sealants and metal edge seals A.1 Outer sealants A.1.1 Test specimens Three sets of test specimens of adhesive bond glass-sealant-glass shall be prepared in accordance with the sealant manufacturer’s instructions. The specimens may be supplied by the sealant or IGU manufacturer. Each set shall consist of at least 7 specimens. Specimens shall be cured and stored for at least 28 days at standard laboratory conditions. After specimen preparation and storage, but before the aging (and before testing of unaged specimens) the width, depth and length of every specimen shall be measured and recorded. NOTE 1 The number of specimens in each set can be increased to ensure necessary number of valid measurements (glass may break during tensile test). The test specimen shall be representative for the sealant to be tested. The test specimens with polymeric sealants shall be as given in Figure A.1, i.e.: a) specimen glass substrate dimensions:
· 50 mm,
· 12 mm, 6
mm nominal thickness. b) sealant dimensions: (50 ± 1) mm, (12 ± 1) mm, (12 ± 1) mm The sealant should not exceed the glass dimension.
Key 1 glass 2 sealant 3 glass 4 face which may be coated 5 side view 6 end view Figure A.1 — Polymeric sealant test specimen
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