Minimal expanding foam for use with water features (including waterfalls, streams, and ponds), landscape and garden features, retaining walls, and other outdoor applications. Bonds to, and secures, both porous and nonporous stones and rocks without mortar, allowing the construction of water features quickly and easily. No special tools required. Directs water over, not under rocks. This improved water flow enhances waterfall aesthetics. The closed cell formulation will not shrink, and lasts for years in wet conditions. It may also be used to adhere cap stones in retaining walls, repair cracks and holes in trees, insulate and secure around water spigots. It's the perfect solution for a variety of applications, anywhere there's a gap to fill or an adhesive is needed. Paintable. Fish and plant safe. Black. Cures in 8 hours. 12 oz. can equals 10 quart tubes of caulk (1 = 10). 18 month shelf life.