Rick's Free Auto Repair Advice

Plastic Bumper repair kit

3M introduces a DIY plastic bumper repair kit for plastic bumpers

3M believes if you can master the art of sanding, you can fix the damage on your plastic bumper with their bumper repair kit. That’s why they’ve introduced a Bondo Bumper Repair Kit just for you.

You can’t use ordinary body filler to repair scratches or dents on a flexible plastic bumper—it won’t hold or will hold for a while and then pop off. You need a 2-part epoxy filler to do the job. That’s where the 3M Bondo Bumper Repair Kit comes in. The kit contains pre-measured packets of epoxy resin and hardener, along with 80, 180 and 320-grit sandpaper, spreaders and fiberglass screen mesh.

Remove bumper paint first

Whether you’re trying to fix bumper scratches or dents, always start the repair by removing the existing paint with 80-grit sandpaper.

Next, sand the scratches with the 80 and 180-grit sandpaper until they’re smooth to the touch. Feather all the edges into the nearby painted areas.

sand bumper scratches

Clean the sanded area with wax remover

Using a clean cloth, wipe wax remover over the entire sanded area to achieve the best bond with the epoxy.

Fill the repair with the epoxy in the 3M Bondo Bumper Repair Kit

Empty the epoxy resin onto a clean mixing pad. Do not use cardboard as a mixing pad. Then add the catalyst hardener. Using the included spreader, drag the entire mixture down the mixing pad. When you reach the end of the pad, use the spreader to scrape the filler/hardener upwards on the pad until you reach the top. Then fold the mix onto itself and drag it down again. Repeat the process several times using a “Figure 8” movement until you get a consistent color. The Figure 8 scooping and folding technique results in a more complete mix of the two components without introducing air into the mix.

Fill the dent

If you’re filling a dent, apply small amount of mixed epoxy into to the dented area. Then apply the fiberglass screen mesh and top off the repair with more mixed epoxy filler.

fill bumper dent with epoxy

Fill the bumper dent with epoxy and fiberglass screen mesh

Allow time for the epoxy to cure before sanding. Then sand the repair using the 180 and 320-grit sandpaper.

feathered bumper repair

Sand the repair smooth and feather the edges

Prime and paint

Mask off the repair to prevent primer and paint overspray. Prime the repair with automotive primer. Allow to dry and lightly sand with 320-grit sandpaper. Wipe with a clean cloth to remove the dust. Then paint.

apply primer

Apply primer to the repair

Where to purchase touch up paint

First, find the paint code for your vehicle. Consult this site for the location of the paint codes by make and model. Purchase matching touch up paint in spray cans from automotivetouchup.com, duplicolor.com or from your car dealer. For tips on how to apply touchup paint, watch the automotivetouchup.com videos below.

©, 2019 Rick Muscoplat

FTC Disclosure

I have not been paid by 3M for this post. I have received samples of the products but that does not influence my posts. I have written many negative reviews on products I’ve received as samples. If you see an Amazon link for products on my site, be aware that I receive a small commission if you click on the link and eventually purchase from Amazon. The commissions help offset the cost of maintaining the site.

Posted on by Rick Muscoplat

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