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How To Fix A Cracked Bumper

How To Fix A Cracked Bumper


  • Soldering Iron
  • Custom Mix Spray Paint Can
  • Sandpaper


Step 1: Remove your cracked bumper

It is recommended that you remove or at least partially remove the bumper in order to repair the crack. Car bumpers are held in place with several 10mm bolts and a few puch-in pins. Once you remove the screws you can easily remove the bumper

Step 2: Align the bumper crack

Join the bumper at the crack. You may need to use a C-clamp to hold the bumper together as you try to weld it. It is important to line the bumper crack as closely as possible. Clean the area around the crack before you start work.

Step 3: Start welding the cracked bumper

Use the soldering iron to start welding the cracked bumper. The soldering iron may take several minutes to warm up and be able to melt the plastic. Once the soldering iron is hot, start to weld the bumper on the outside first. This way you can line the bumper up perfectly.

Step 4: Weld the inside of the cracked bumper

It is import to weld the bumper on the inside as well as it adds extra strength to the repair. Use an extra piece of plastic on the inside to add to the bumper as you weld the crack. For best results, weld the crack on the inside with a soldering iron first, then go over with some extra plastic and weld it over to add extra support.

Step 5: Sand the bumper crack

Use sandpaper to flatten the bumper weld. The plastic at this point looks ugly. Start with 120 grit paper, then move to 220, then 300, and finish it off with some 500 grit paper.

Step 6: Paint the bumper

Use an automotive primer to spray paint the bumper. It is not necessary to spray the entire bumper, especially if you have only cracked the lower bumper lip. Let the primer dray. Finally, paint the bumper using a custom paint that matches your car’s exact colour. You can get the paint code by looking it up on the VIN sticker.