Hi Heat Coating Copper Use this hi-heat coating to finish off a clean and well- protected exhaust insulating wrap installation. the coating will protect the wrap from abrasion and harmful liquid spills. extra resins and binders toughen the surface and help extend the life of the wrap by protecting it from friction. they also seal the pores to minimize the penetration of harmful liquids. the 11 oz spray coating now comes in three colours. black aluminium and new copper.