100% RTV Silicone Sealant Heat Resistant Industrial Grade is a one-component, non-slumping sealant that cures to a rubbery solid at room temperature. This high temp silicone sealant is formulated with iron oxide to resist extreme heat exposure and withstand temperatures up to 600° F. This sealant is extremely durable and can be used on industrial ovens, heating elements, boilers, and more without cracking, shrinking, or peeling.