A stable caulk or sealant composition containing as principal ingredients styrene-ethylene/butylene-styrene copolymer and Diethyl ether is disclosed. The composition is generally employed in a canister pressurized with a propellant to expel a stream of water-impervious sealant to fill cracks, crevices and gaps to water damage. When desired, the sealant is removable from the application area.