Abstract: An anti-fouling silicone composite sheet including: a substrate layer containing a fluororesin; and a silicone adhesive layer stacked on one surface of the substrate layer, having a hardness of 5 or less as measured with an Asker C hardness tester, and having an adhesive force with respect to a mortar test piece of 5 N/25 mm or more, wherein the substrate layer has a surface on which the silicone adhesive layer is stacked and the other surface is an anti-fouling surface. By the above configuration, the present invention provides an anti-fouling silicone composite sheet capable of exhibiting anti-fouling performance, washability, easiness of washing, and wear resistance stably for a long period, easily attachable to an adherend, and conformable even to cracking and shifting on the application surface; and a method for performing a prevention of graffiti by using the anti-fouling silicone composite sheet.

Abstract: The additives for coating compositions comprise as an essential component an organopolysiloxane having in the molecule at least one siloxane unit to which one or more mercapto-substituted hydrocarbon groups are bonded. The additives serve to impart blocking resistance to surfaces.