RD Pro 100% Industrial Grade Heat Resistant RTV Silicone is a one-component, non-slumping sealant that cures to a rubbery solid at room temperature. It is formulated with iron oxide to resist extreme heat exposure and withstands temperatures up to 600° F. It adheres to Glass, Fiberglass, Non-oily Woods, Most Metals, Porcelain, Ceramic Tile, Most Painted Surfaces, Many Plastics & Rubber. Use on Oven Belts, Industrial Ovens, Oven Windows, Drying Ovens, Boilers, Fired Heaters, Flanged Pipe Joints, Access Doors, Heating Elements in Appliances & Flues on Gas Appliances.