NovaFlex Multi-Purpose Adhesive Sealant is a premium all-weather medium modus silicone that stays flexible and resistant to cracking and discoloration. Cured sealant resists . This premium all-weather silicone is tack-free in 10 minutes and is completely cured in two days. Recommended for sealing tent campers, toy haulers, travel trailers, motorhomes and fifth wheels.