The PC Marine all purpose epoxy putty stick is hand moldable for marine use. The white epoxy putty is the ultimate, fast setting emergency repair putty for marine and plumbing repairs. It is waterproof and cures wet, dry, or underwater. The putty can be used to bond holes in fiberglass, water tanks, PVC, swimming pools, boats, and metal. No sag and drip. Use in 3 steps: 1) Break the putty. 2) Mix the putty by hand. 3) Apply the putty to the area of repair. Work time is 15-20 minutes and cure time is 30-60 minutes. Made in the USA.