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BOSTIK POWERPLUG Fast Setting Hydraulic, quickset, hydraulic cement that immediately obstructs streaming water of moisture leakage from holes or cracks in concrete and masonry walls. With its extraordinary strength and durability, Powerplug will seal out water to further the life of the structure. Recommended Uses • Masonry • Swimming pools • Water storage facilities • Fountains • Ponds • Concrete • Sea Walls • Tunnels • Water channels and drains • Piers