neutral weather resistant silicone sealant is mainly for sealing in glass, metal(except copper), concrete, marble, tile ,etc M-820 neutral weather resistant silicone sealantA . FEATURESMono-component, convenient to use at the temperature 5-40°C Neutral curing, high modulus, no corrosion to the materials such as glass, coated glass, concrete, marble, metal, etc. Excellent adhesion to most building ...