This European Standard 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 prEN 1279-1:2015. For the purpose to demonstrate that edge seal components will allow the insulating glass unit to conform to the requirements given in prEN 1279-1:2015, Clause 6, prEN 1279-2:2015 and prEN 1279-3:2015 also apply.