How to Repair a Plastic Bumper Dent

Depending on the severity of a bumper dent, you may find that it can become less effective if it is left unchecked. By following the steps necessary to repair the bumper, you can quickly rectify the unsightly problem and ensure that it is capable of doing its job.

Step 1 – Inspection

Prior to undertaking any of the work necessary to repair the bumper dent, you should inspect it to determine the severity of the problem. Measure the perimeter of the dent and have the result to hand when purchasing the repair tool. The size of the problem may determine what method must be used to rectify it.

Step 2 – Clean

Clean the area around the bumper dent so that the tool used to fix it can attach to the surface properly. For light debris, a surface dampened with water should be sufficient, while car shampoo should be used for heavier soiling. In either case, use a cloth to thoroughly dry the surface after it has been cleaned.    

Step 3 – Repair

Tools to repair bumper dents are available from car accessory supply stores or can often be hired when needed. Where you have access to the rear of the bumper and the dent is a minor one, you will find that it can be fixed with the use of a heat gun. Apply heat to the dented section of the bumper until it is just warm enough to become pliable. You will then be able to push the dent out from the rear. Leave the area to cool when it is at the same level as the rest of the bumper. For larger dents, a plunger tool will be required. The mouth of the plunger must be firmly attached to the surface to create an airtight seal, which can be improved by applying a little petroleum jelly to the rim of the plunger’s mouth. Once the plunger is positioned, it should be held tightly and tugged backward to pull the bumper dent out.  

Another type of plunger available on the market will require a hole to be drilled into the center of the dent. This will enable a hooked wire to be inserted so that it can be pulled out. Where this is the case, carefully drill the hole so that you only create a recess in the bumper and do not go further than necessary.

Step 4 – Repair     

Where it was necessary to drill a hole to repair the bumper, you can use a bumper repair kit to seal the hole. The kit should contain all the items that you need and you should ensure that it relates to the type of plastic that the bumper is made from. Mix the repair compound in accordance with the instructions and apply it to the hole with a putty knife until it is filled completely. Even out the surface and use some sandpaper to smooth it once it is dry.