BS 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

1 Scope
This International Standard specifies a method for the determination of the adhesion/cohesion properties of sealants after cyclic exposure to heat and artificial light followed by a period of exposure to water at a defined temperature.
NOTE The cyclic exposure of the test specimens to water and to radiation and heat is meant to simulate the exposure of sealants in service to natural weather conditions. The acceleration factor in comparison with the real situation is unknown. The intention is not to receive durability data for the sealants under evaluation but to ensure a minimum performance in glazing applications.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards.
ISO 4892-1:1999, Plastics — Methods of exposure to laboratory light sources — Part 1: General guidance
ISO 4892-2, Plastics — Methods of exposure to laboratory light sources — Part 2: Xenon-arc sources
ISO 6927, Building construction — Jointing products — Sealants — Vocabulary
ISO 13640, Building construction — Jointing products — Specifications for test substrates
CIE Publication No. 85:1989, Technical Report — Solar spectral irradiance
3 Terms and definitions
For the purposes of this International Standard, the terms and definitions given in ISO 6927 apply.
4 Principle
Specimens are prepared in which the sealant to be tested adheres to two parallel glass surfaces. After submitting the specimens to a cyclic exposure to artificial light at elevated temperature and to water, the specimens are extended to a defined width. After maintenance of the extension for a defined time, the specimens are examined for evidence of loss of adhesion or cohesion.
BS 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