Epoxy Putty (One-Pound)

Simply unbelievable

It's so strong you can drill and tap it, yet gentle enough that you can apply it with your bare fingers. Since it's water-based, you can simply wet your fingers and work it until it is almost perfectly smooth before it dries eliminating lots of sanding. However, when it cures it's “rock hard” making it perfect for repairing steel, plastics, concrete, etc. Amazingly, it even sticks to damp surfaces and will cure underwater.