Reliable Epoxy Putty for Marine Repairs Above & Below the Waterline Protect your boat from costly damage with the West Marine Marine Rx Epoxy Repair Kit. Gelcoat scrapes and dings that expose fiberglass should be repaired quickly to prevent water intrusion, and this versatile two-part epoxy putty makes the job simple. Easy to mix by hand, it forms a spreadable compound ideal for non-structural repairs on dry, de-waxed flat, vertical, or inverted surfaces. With a working time of 32–36 minutes (shorter in warmer temperatures), Marine Rx cures to a durable finish that can be sanded, primed, and painted within 18–24 hours. Its strong epoxy bond adheres to wood, fiberglass, gelcoat (polyester and vinylester laminates), metal, ceramics, glass, and most plastics. Perfect for fixing dock rash, scratches, and minor hull dings, Marine Rx seals and protects fiberglass against moisture—keeping your vessel in top condition.