How to repair a Jet Ski Cowl

Urethane Supply Company has everything needed to repair and refinish plastics. From plastic welders to instant glues to epoxy fillers to paints to primers, you name it. Some of our products that you may be familiar with are: Mini-Weld Airless Plastic Welder, Plastic Magic Adhesion Promoter, PlatiFix plastic repair kit (not to be confused with Plastex plastic repair kit), Bumper and Trim Black (not to be confused with Forever Black), Wax Blaster wax remover, Flex Filler (not to be confused with Duramix), Black Cat primer (not to be confused with Transtar Hydroflex), Insta-Weld adhesives (not to be confused with Crazy Glue or LocTite), Bumper and Cladding Coat, ATV Fender Welder, Kayak and Canoe Welder for Pelican canoes, FiberFlex welding rods, Uni-Weld welding rods, EZ Weld Hot Air Plastic Welder, Steinel hot air plastic welder. We also carry a complete line of plastic welding rods. For example, we manufacture ABS welding rods, Polypropylene welding rods, Polyethylene welding rods, TPO (TEO) plastic welding rods, Polyurethane welding rods. In addition to the products you need to repair plastic, we also have detailed instructions and tutorials with step-by-step instructions on how to repair plastic.

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How to Repair Jet Ski / Wave Runner Cowl - Step by Step

This will show how to repair a damaged Jet Ski / Wave Runner cowl. These cowls are made from SMC (Sheet Moulding Compound). SMC is similar to fiberglass. In fact SMC has about 25% by weight of glass fibers!

Step 1

The section of the personal watercraft cowl is where the handlebars come through. As you can see, a chunk has broken off.

Step 2

The first thing we want to do is "tack" the broken piece back in place. We will do this using the Inta-Weld adhesive. Before applying the Insta-Weld adhesive, spray Insta-Weld Activator to the surfaces to be bonded. After the solvent evaporates, it will leave behind the active ingredient to cause instant curing of the Inta-Weld cyanoacrylate adhesive.

Step 3

Adjust and align the broken piece where it needs to be and hold it in place with Aluminum Body Tape.

Step 4

Use the low viscosity Insta-Weld 1 adhesive. It's low viscosity allows it to wick into tight spaces.

Step 5

Apply another shot of Insta-Weld Activator to quickly cure the Insta-Weld adhesive.

Step 6

Remove the Aluminum Body tape a dig out a small "channel" along the crack line. This will provide an area for the epoxy filler to be level with the surface.

Step 7

Epoxy fillers, such as our SMC Hardset Filler, adhere best on an abraded surface. Using 50 grit paper, abrade the area spanning the crack for about an inch (2.54 cm) to each side of the crack.