Stop leaks on virtually any surface with the Hippo Patch. Just remove dirt, rust, mold and mildew and apply the patch.It bonds itself to the surface and then can be painted or top coated to match whatever you're patching. The Hippo Patch bonds immediately it requires no curing time. It also remains flexible on any surface and can be applied between the temperatures of 13 F and 120 F. It's the perfect way to patch any surface, including boat repair, canoe repair, kayak repair, livewell repair, tank repair, and wader and boot repair. It works on canvas, nylon, all metals, all plastics and all types of rubber. Cut to fit.