Loctite 431348 2-Ounce Cylinder Epoxy Repair Putty Stick
Loctite is known for a wide range of adhesives and cohesive, both for automotive and industrial uses. They refer to their epoxy putty as a "general purpose repair putty" and that it is. It will stick to pretty much all architectural materials, as well as rigid plastics, fiberglass, rubber and metal. It can also be used on wet surfaces, as it will bond and cure, even underwater. This makes it ideal for repairing leaks in tanks and pipes. The hardened putty will not shrink or crack, making it possible to drill or grind it when cured.