If the catalyst with low activity is used, then the condensation reaction is not complete, and only a soft coating can be obtained. On the contrary, if a highly active catalyst is used, a hard and brittle coating can be obtained. There are also catalysts that can improve the hardness of the coating without seriously reducing the elasticity of the film.
Silicone resins have good bonding properties for iron, aluminum, silver, tin, etc., except copper, especially under the condition of heating at high temperature. In addition, silicone resins for organic materials, such as plastics, silicone rubber and other bonding is mainly depends on the latter surface energy and silicone compatibility. The lower the surface energy, the worse the compatibility of the material, often more difficult to bond, for this material, can be through the surface treatment of the substrate, and the introduction of viscosity in the silicone resin, you can improve the adhesion of silicone resin to a certain extent.