Pro tip: that 3M seam sealer I put on a rocker panel in 2019 is still holding while the cheaper stuff cracked in 8 months

Elizabeth Henderson · 2026-09-17T04:45:05.948878+00:00

I did half a rocker repair on a 2014 Silverado with the cheap tube and the other half with 3M 08367, just to see. Eight months later the cheap side was cracked and lifting at the wheel arch, and the 3M side still looked wet. The prep was the same on both sides, same wire wheel, same wax and grease remover. I showed the owner and he couldn't tell which side was which until I pointed at the cracks. What sealer are you all running for rockers and wheel wells that actually survives Nebraska winters?

Discusd

Loading…

Pro tip: that 3M seam sealer I put on a rocker panel in 2019 is still holding while the cheaper stuff cracked in 8 months | Auto Body Repairers - Discusd