Epoxy for emergency and permanent repairs to fuel and water tanks. Makes permanent and emergency repairs on aluminum boats, outdrives, fuel and water tanks and other aluminum parts. Easy to use; just hand knead for 1 minute and apply to damaged area. Product cures under water. Once cured you can drill and tap for screw threads. No boat should be without this item as it could be the product that saves you from sinking. You never know when a thru-hull fitting gets knocked off or a manifold blows - this epoxy stick can save the day and maybe save the whole trip, too.