Vinyl fencing is known for its durability, good looks and affordability. It is made from low-maintenance materials, and doesn't require much attention from homeowners to stay looking sharp. However, accidents, hard freezes and extreme heat can crack or puncture vinyl fencing. A damaged fence becomes vulnerable to further damage, and its structural strength may also diminish.

Fortunately, most homeowners can do a basic repair of cracks and holes easily and quickly. Below is a step-by-step guide to repairing cracks and holes in a vinyl fence using auto body filler.

Carve Away Rough Edges

The first step in repairing a cracked or punctured vinyl fence is to remove all rough edges from around the edges of the crack or hole. Burrs or splinters will interfere with the repair process, and these rough spots will also leave an unsightly appearance when you have finished.

Carefully trim the inside edge of the crack or hole with a sharp utility knife to eliminate the rough spots. For best results, cut a bevel along the edge of the vinyl; this will help you create a much smoother transition when adding filler to the fence.

Sand the Area Around the Damage

After you have removed the rough edges around the inside of the damaged area, the next step is to use 200-grit sandpaper to smooth the repair site. Sand away any rough spots that you may have missed.

Next, transition to a piece of 400-grit sandpaper to further smooth the area.

Clean the Immediate Area

Once you have cleaned up the crack or hole, the next step in the process is to remove any chemicals or oils that might prevent the filler from adhering to the vinyl. Soak an old rag in 90 percent isopropyl alcohol, then wipe down the area around the opening on the outside of the fence.

Fill the Opening with Spray Foam

If the crack or opening is more than an eighth of an inch wide, you will need to create a backing for the filler. Otherwise, the filler will sag and leave an indentation or may fall out of the opening altogether. Spray foam used for insulating homes and sealing holes and crevices works well for this application.

To fill the opening, insert the end of the foam spray can's nozzle extension into the opening. Next, carefully spray a little foam at a time. Pause periodically to evaluate your efforts and to ensure you don't accidentally overfill the interior space with foam. Too much foam can warp the plastic and cause bulging.

After you have filled the opening, wipe away any spilled foam with the alcohol-soaked cloth. Allow the foam to dry completely before moving to the next step in the repair.

Seal the Opening with Auto Body Filler

Once the spray foam has dried, you will need to use auto body filler to seal the opening and blend the repair site into the surrounding fence. You can purchase auto body filler in small cans from most general merchandise and auto parts stores.

Apply the filler using a putty knife blade. Be sure to push the filler all the way into the opening and leave no gaps between the material and the foam or edges of the plastic. Finish the application of filler by wiping away excess putty with a clean putty knife blade.

After the filler has dried the required amount of time, use 400-grit sandpaper to form a seamless transition between the filler and the vinyl. Shine a flashlight at the repair site and observe from an angle to identify any missed areas that will need additional sanding. When you are satisfied with the repair site, wipe it down with a dry, clean cloth.

Paint the Repaired Area

The last step is to paint the repair site using an enamel designed for exterior applications. In addition, be sure to purchase paint that will adhere to vinyl, or use a primer coat first for additional adhesion.



If you have questions about your vinyl fence, contact Duke Fence Co., Inc. for assistance. Our team of experts can help you with all of your fencing needs, including installation and servicing.