Sprayon® MR305 Heavy Duty Silicone Release Agent Aerosol is an extra heavy concentration of high viscosity silicone that provides maximum releases under the most severe molding conditions. High purity minimizes crazing, spotting, sticking and other causes for rejects. Does not contain any chlorofluorocarbons (CFC's) or hydrochlorofluorocarbons (HCFC's). Heat stable to 550°F.