Star Brite 4oz Epoxy Putty Stick - Make Fast, Permanent Repairs - Even Underwater Bonds with fiberglass, wood, concrete, metal, ceramic, glass & various plastics Quickly and easily repair holes, gouges and dings in pools, boat hulls, hot tubs, decks, leaking gaskets, tanks, gutters, kayaks, surfboards... Works on wet, damp, dry surfaces - even underwater Easy to use; just hand knead until color turns white and apply to damaged area Sets in 5 minutes for emergency or permanent repairs - can be sanded, drilled and tapped in 1 hour