Dow Corning 795 consists of a single component, provides medium elasticity and is comprised of a neutral cure silicone architectural grade formula. It is a sealant, comprised of non-sagging silicone material, cures to a medium-modulus silicone rubber when exposed to moisture in the air. Joint performance does not change significantly with aging or exposure to weather and remain unaffected by sunlight, rain, sleet, snow, ultraviolet radiation, atmospheric contamination, ozone, and temperature extremes. our customer tells us that it works best on fiberglass, plastic resin forehatch frames, and wood. Note: Should not be applied to building materials that bleed oils, plasticizers or solvents, or in totally confined spaces. Do not apply to frost-laden or wet surfaces, or to surfaces that are in direct contact with food