The "Marineweld" waterproof blue and black epoxy adhesive in two parts from J-B Weld provides strong, lasting repairs to multiple surfaces such as metal, wood, plastic, tile, PVC, ceramic, fiberglass or aluminum. It is ideal for boats, decks and hull, inboard and outboard engines as well as personal watercrafts. Its strength is 2424 PSI and the set time is just 6 minutes when the cure time is 4 to 6 hours. Before application, it is necessary to clean the surface area of dirt, grease, oil, paint, or loose debris. It comes in two different tubes and weighs 28.4 grams.