Novaflex Multi-Purpose Adhesive Sealant is a premium all-weather medium modulus silicone that stays flexible and resistant to cracking and discoloration. Cured sealant resists mildew. This premium all-weather silicone is tack free in 10 minutes and is completely cured in up to 2 days. Cure time is with above 30% relative humidity and varies with temperature and humidity.