A glazing assembly comprising at least one transparent semi-rigid or rigid substrate, at least one thermally, electrically and/or electrochemically active system on said substrate, and at least one seal in contact with said active system, wherein said seal contains compounds which are essentially free of chemical species or functional groups which diffuse out of said seal and react with materials of said active system, under the operating conditions of said active system, or to said materials;
- wherein said seal comprises a polymer matrix based on thermoplastic or thermosetting polymer(s);
- and
- wherein said seal comprises, in weight percentages, from 20 to 85% by weight of elastomer(s) (A);
- from 15 to 30% of plasticizer(s) (B);
- from 0 to 25% of adhesion promoter(s) (C) and from 0 to 30% of filler(s) (D).