... voids in metals. 3.Rebuild rust damage. faststeel putty stick FastSteel Epoxy Putty Stick is a hand-kneadable, fast-setting, industrial ... for structural applications.Benefits:•Will not shrink or rust. •Putty-like consistency eliminates drips and runs for a "no mess ... , sawed, sanded, filed, tapped, machined, and painted. •Certified to Standard 61 by The National Sanitation Foundation for use in contact ...