RTVS Primer 40 is a dilute solution of reactive silicone resins which can be used to improve or add adhesion of one and two component condensation (tin) cure silicone RTV materials. It is suitable to add adhesion to a variety of substrates to which two component RTV Silicones have little or no adhesion. This primer may be used on metal, glass, ceramics, and many plastics. The product works on the basis on improving the ability of the site to accept the silicone polymer.