Loctite Fixmaster® 235487 Underwater Repair Epoxy – 4 oz Stick | 30 min Cure

Loctite Fixmaster® 235487 is a two-component, putty-like epoxy stick formulated for permanent repairs on wet or submerged surfaces. Its green-and-white epoxy cures underwater in just 30 minutes, bonding to steel, concrete, wood, PVC, and most plastics—even on damp or fouled substrates. Once cured, the hardened epoxy can be drilled, tapped, sanded, machined, or painted. Ideal for plumbing leaks, pool repairs, hull patching, and emergency maintenance in marine, industrial, and MRO settings.

Key benefits

Underwater curing – bonds and sets fully in standing water or damp conditions

Fast functional cure – achieves handling strength in 30 minutes

High strength – durable, machinable repair holds up to 300 °F/150 °C

Versatile substrate adhesion – sticks to metal, concrete, wood, PVC, fiberglass, and more

Putty-like stick – no measuring or mixing; simply knead, apply, and shape

Typical applications

Pool and spa leak repairs

Marine hull patching and boat through-hull fittings

Emergency plumbing fixes on wet pipes and fittings

Repair of concrete cracks and structural defects

Field repairs on tanks, flanges, and valves