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.