Expandable foam in a convenient aerosol can.This one-component urethane foam expands and cures to a semirigid, closed-cell mass for caulking, sealing,filling and insulating. Equals 24 tubes of caulk, according to the manufacturer. Use for filling boat hullcavities, sealing electrical outlets. 12oz. aerosol can.Key featuresFills cavitiesSeals electrical outletsReduce unwanted noise and vibrationCures to a firm semi-rigid closed cell massSpecificationsType:One-Part Urethane FoamCure Time:20 MinutesColor:WhiteBest Use: Sealing, caulking, filling, insulation