EN ISO 11431:2025

Building and civil engineering sealants - Determination of adhesion and cohesion properties of sealants after exposure to heat, water and artificial light through glass (ISO 11431:2025)

This document specifies a method for the determination of the adhesion and cohesion properties of sealants after cyclic exposure to heat and artificial light followed by a period of exposure to water at a defined temperature.

Fugendichtstoffe für Hoch- und Tiefbau - Bestimmung des Haft- und Dehnverhaltens von Dichtstoffen nach Einwirkung von Wärme, Wasser und künstlichem Licht durch Glas (ISO 11431:2025)

Mastics pour le bâtiment et le génie civil - Détermination des propriétés d'adhésivité et de cohésion des mastics après exposition à la chaleur, à l'eau et à la lumière artificielle à travers le verre (ISO 11431:2025)

Le présent document prescrit une méthode de détermination des propriétés d’adhésivité et de cohésion des mastics soumis à un certain nombre de cycles d’exposition à la chaleur et à la lumière artificielle, suivis d’une exposition à l’eau à une température élevée.

Tesnilne mase za stavbe in gradbene inženirske objekte - Ugotavljanje adhezijskih in kohezijskih lastnosti tesnilnih mas po izpostavljenosti vročini, vodi in umetni svetlobi skozi steklo (ISO 11431:2025)

Ta dokument določa metodo za ugotavljanje adhezijskih in kohezijskih lastnosti tesnilnih mas po ciklični izpostavljenosti vročini in umetni svetlobi, ki ji sledi obdobje izpostavljenosti vodi pri določeni temperaturi.

General Information

• Status: Published
• Publication Date: 09-Sep-2025
• ICS: 91.100.50 - Binders. Sealing materials
• Technical Committee: CEN/SS B02 - Structures
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 10-Sep-2025
• Completion Date: 10-Sep-2025
• Ref Project: SIST EN ISO 11431:2025 - Building and civil engineering sealants - Determination of adhesion and cohesion properties of sealants after exposure to heat, water and artificial light through glass (ISO 11431:2025)

Relations

• Replaces: EN ISO 11431:2002 - Building construction - Jointing products - Determination of adhesion/cohesion properties of sealants after exposure to heat, water and artificial light through glass (ISO 11431:2002)
• Effective Date: 25-Oct-2023

Overview

EN ISO 11431:2025 (ISO 11431:2025) specifies a laboratory method to determine the adhesion and cohesion properties of building and civil engineering sealants after controlled cyclic exposure to heat, artificial light (through glass) and subsequent water exposure. The procedure simulates aspects of natural weathering for glazing applications to check minimum performance of sealants - it is intended as a comparative/quality test rather than a direct prediction of long-term field durability.

Key topics and technical requirements

• Scope and principle: Specimens are prepared with the sealant adhered between two parallel glass supports, exposed to cycles of heat and artificial light, followed by immersion or exposure to water at a defined temperature, then mechanically extended and observed for loss of adhesion or cohesion.
• Specimen preparation and conditioning: Detailed guidance for preparing test specimens, spacing, and conditioning methods (Methods A and B) to ensure reproducible results.
• Apparatus and components: Required equipment includes glass supports (per ISO 13640), spacers, anti-adherent substrates, a ventilated convection oven, containers for water exposure, a test chamber with an artificial light source, xenon‑arc lamps (see ISO 4892‑2), suitable filters, a black standard thermometer (for maximum surface temperature measurement), an extension machine and measuring devices.
• Exposure regimes: Defines cyclic exposure procedures (automatic and manual cycling) combining radiation, elevated surface temperature and water exposure. Exact temperatures, times and elongation hold periods are specified in the standard and must be followed for valid comparisons.
• Test reporting: Requirements for documenting test conditions, apparatus, specimen details and observed adhesion/cohesion failures.

Applications and users

• Who uses it: Sealant manufacturers, independent testing laboratories, façade and glazing product specifiers, architects, contractors, certification bodies and regulatory authorities.
• Practical applications:
  • Type testing and quality control of glazing and façade sealants.
  • Comparative evaluation of formulations for adhesion/cohesion after accelerated weathering.
  • Supporting product specifications and conformity assessment for building sealants used in windows, curtain walls and civil engineering joints.

Related standards

• ISO 4892-1 - General guidance for laboratory light-source exposure
• ISO 4892-2 - Xenon‑arc lamp exposure methods (referenced for artificial light)
• ISO 6927 - Sealants vocabulary (terms and definitions)
• ISO 13640 - Specifications for test substrates (glass supports)

Keywords: EN ISO 11431:2025, ISO 11431:2025, building sealants, civil engineering sealants, adhesion testing, cohesion testing, artificial weathering, xenon‑arc, glazing tests, sealant durability.

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2025
Nadomešča:
SIST EN ISO 11431:2004
Tesnilne mase za stavbe in gradbene inženirske objekte - Ugotavljanje adhezijskih
in kohezijskih lastnosti tesnilnih mas po izpostavljenosti vročini, vodi in umetni
svetlobi skozi steklo (ISO 11431:2025)
Building and civil engineering sealants - Determination of adhesion and cohesion
properties of sealants after exposure to heat, water and artificial light through glass (ISO
11431:2025)
Fugendichtstoffe für Hoch- und Tiefbau - Bestimmung des Haft- und Dehnverhaltens von
Dichtstoffen nach Einwirkung von Wärme, Wasser und künstlichem Licht durch Glas
(ISO 11431:2025)
Mastics pour le bâtiment et le génie civil - Détermination des propriétés
d'adhésivité/cohésion des mastics après exposition à la chaleur, à l'eau et à la lumière
artificielle à travers le verre (ISO 11431:2025)
Ta slovenski standard je istoveten z: EN ISO 11431:2025
ICS:
91.100.50 Veziva. Tesnilni materiali Binders. Sealing materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 11431
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2025
EUROPÄISCHE NORM
ICS 91.100.50 Supersedes EN ISO 11431:2002
English Version
Building and civil engineering sealants - Determination of
adhesion and cohesion properties of sealants after
exposure to heat, water and artificial light through glass
(ISO 11431:2025)
Mastics pour le bâtiment et le génie civil - Fugendichtstoffe für Hoch- und Tiefbau - Bestimmung
Détermination des propriétés d'adhésivité et de des Haft- und Dehnverhaltens von Dichtstoffen nach
cohésion des mastics après exposition à la chaleur, à Einwirkung von Wärme, Wasser und künstlichem Licht
l'eau et à la lumière artificielle à travers le verre (ISO durch Glas (ISO 11431:2025)
11431:2025)
This European Standard was approved by CEN on 4 September 2025.

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. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists 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, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11431:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 11431:2025) has been prepared by Technical Committee ISO/TC 59 "Buildings
and civil engineering works" in collaboration with CCMC.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by March 2026, and conflicting national standards shall
be withdrawn at the latest by March 2026.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 11431:2002.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: 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, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 11431:2025 has been approved by CEN as EN ISO 11431:2025 without any modification.

International
Standard
ISO 11431
Third edition
Building and civil engineering
2025-08
sealants — Determination of
adhesion and cohesion properties of
sealants after exposure to heat, water
and artificial light through glass
Mastics pour le bâtiment et le génie civil — Détermination
des propriétés d'adhésivité et de cohésion des mastics après
exposition à la chaleur, à l'eau et à la lumière artificielle à travers
le verre
Reference number
ISO 11431:2025(en) © ISO 2025
ISO 11431:2025(en)
© ISO 2025
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
ISO 11431:2025(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 2
5.1 Glass supports .2
5.2 Spacers .2
5.3 Anti-adherent substrate .3
5.4 Ventilated convection-type oven .3
5.5 Container .3
5.6 Test chamber with an artificial light source .3
5.7 Artificial light source with suitable filters .3
5.8 Black standard thermometer .3
5.9 Extension machine .4
5.10 Separators . .4
5.11 Measuring device .4
6 Preparation of specimens . 4
7 Conditioning . 4
7.1 General .4
7.2 Method A .4
7.3 Method B .4
8 Test procedures . 5
8.1 General .5
8.2 Exposure conditions .5
8.2.1 General .5
8.2.2 Automatic cycling .5
8.2.3 Manual cycling .5
8.3 Elongation of the specimens.5
9 Test report . 6

iii
ISO 11431:2025(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
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with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO
...