Sprayon® MR315 Urethane and Styrene Silicone Release Agent Aerosol is a high-viscosity silicone that eliminates the common problem of chemical attacks on ultra sensitive materials. It is compatible with most moldable resins and elastomeric compounds. High purity minimizes crazing, spotting, sticking and other causes for rejection. Does not contain chlorofluorocarbons (CFC?s) or hydrochlorofluorocarbons (HCFC?s).