Everbuild heat resistant silicone everbuild pcheatsil heat resistant silicone is a high temperature resistant fast cure silicone heat stable up to 300 c which is permanent flexibility high modulus sealant it is ideal for joints and assemblies which must be resistant to high temperatures in ducting metal chimneys industrial domestic ovens heating appliances heat resistant silicone has excellent adhesion to most non porous surfaces everbuild pcheatsil heat resistant silicone c3 310ml