Abstract: The invention relates to a glazing assembly comprising at least one and in particular two transparent semi-rigid or rigid substrates on which substrate or between which substrates is placed at least one thermally, electrically and/or electrochemically active system which glazing assembly is provided with at least one seal in contact with at least one of the thermally, electrically or electrochemically active materials of the said system. The seal has an electrical conductivity of less than 10.sup.-4 ohm.sup.-1 .multidot.cm.sup.-1 and/or contains compounds which are essentially free of chemical species or functional groups capable of diffusing out of the seal and reacting chemically or electrochemically with at least one of the said materials within the operating voltage and/or temperature range of the system.

Abstract: The subject of the invention is a seal of flexible/compressible polymer and a surface coating made of a material which is incombustible and/or maintains its integrity at high temperature. The seals are useful in the construction of fire-resistant structures.