626 Electronic Silicone Sealant can be used directly without catalyst or other raw materials and don’t react with other materials, non corrosive, high temperature resistant, weatherproofing. The extreme environments such as Ultraviolet radiation, ozone, rain, snow will not affect them. This product can work properly at -40 to +220 degrees temperature without hardening, cracking and chipping. This product is environmentally friendly material, non-polluting, non-hazardous goods for transportation.