Read a post about using filler on plastic bumpers and it clicked for me

Saw a guy on a forum say he uses a specific two part plastic filler for bumper repairs instead of regular body filler, and after trying it on a cracked bumper last week I can see why. The stuff didn't shrink or crack when I flexed the bumper like the regular filler always does. Has anyone else switched to a plastic specific filler for their bumper jobs?

2 comments

2 Comments

cole_baker1d ago

You actually had cracking issues with regular filler on a bumper? What brand of plastic filler did you go with? I've been using the same old Bondo stuff for years on metal panels and never thought twice about it, but now you got me second guessing my whole approach to plastic repairs. The shrinking thing is what hits home for me because I've had to redo bumper jobs after they sat in the sun and the filler started showing lines.

murphy.aaron1d ago

Wait, are you saying you've had the same issues with the sun making the filler lines show up after it sits outside? Dude, that's exactly what happened to me on a couple of jobs and I thought I was just messing up the prep work. I've been using the regular old Bondo too for metal stuff for years without problems, but on plastic bumpers it seems like it's a totally different story. The shrinking thing is real, especially when the bumper flexes or heats up. I finally stopped fighting with it and switched to a plastic-specific filler from Evercoat and it made a huge difference, no more cracking or lines.