... is mainly for sealing in glass, metal(except copper), concrete, marble, tile ,etc M-820 neutral weather resistant silicone ... no corrosion to the materials such as glass, coated glass, concrete, marble, metal, etc. Excellent adhesion to most building materials ... as glass, aluminum and ceramics; Sealing for marble, granite , concrete, brick and tile, metal panel; Other uses. C .COLOR AND PACKINGColor ...