JB Weld Waterweld Auto Epoxy Putty, 2 oz, Plugs Holes & Make Permanent Repairs In Moist Surface Or Under Water Applications, Waterweld Will Even Repair Leaking Fuel Tanks, Pull Off The Amount Needed For Job & Knead With Fingers Until Thoroughly Mixed, Then Push Product Into Hole, Cures In 20 To 30 Minutes & Can Be Drilled, Sanded, Filed, Tapped, Machined & Painted, It's Non-Toxic & Approved For Use With Potable Water.