How to Repair “Spiderweb Cracks” on Polyurethane Bumpers

How to Repair “Spiderweb Cracks” on Polyurethane Bumpers

Although Urethane bumpers are quite rare on late-model vehicles, the need may arise for one to be repaired from time to time. This bumper belonged to a 1992 Chevrolet Camaro, and, as you can see, it has developed what we call “spiderweb cracks”. These cracks are the result of dirt and grime settling inside cracked paint and eating away at the plastic over time. Let’s take a look at how to repair these cracks using products in Polyvance’s plastic repair line.

V-grooving the cracks: 1:24
Weld with polyurethane welding rod: 1:35
Apply filler: 2:21
Prime: 3:07
Final look: 3:26

Look below for popular product options that can be used to complete this repair.
View this video on our website for more information and product suggestions for this repair:

Polyurethane Welding Rod:

5700HT Mini-Weld Model 7 Airless Plastic Welder:

6122 Round Cutting Burr:

2000-T Flex Filler 2 Tube Kit:

1204 4-Inch Body Spreaders:

CS100 Clean Sheets Mixing Boards:

Waterborne Primers:

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