RubberStop Weather-Resistant Silicone Sealant is made from 100% natural silicone rubber, making it permanently flexible and ideal for sealing roofs or gutters under extreme weather conditions. Compared to other sealants, it doesn’t shrink, crack, or become brittle after being exposed to sunlight for a long time. It has undergone a 250-hour accelerated weathering test and still exhibits outstanding flexibility compared to other sealants that become powdery or brittle. RubberStop can adhere to gal