Chemically stable and shows little change in physical properties after exposure to sunlight, rain, snow, ozone, temperature extremes and weathering. A one-part ready to use material that shows little change in gunnability at temperatures from -80°F (-62°C) to 140°F (60°C) permitting the sealant to be applied in any season. Can be used for extended periods at temperatures up to 450°F (232°C) and for shorter periods at temperatures as high as 500°F (260°C). Mildew-resistant. Long work life or tooling time of 5-10 minutes.