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Home » Public Forums » GMCnet » Rear Wheel Well shell seals (How do you seal the Wheel well shell to the floor?)
Rear Wheel Well shell seals [message #349322] Wed, 16 October 2019 10:58 Go to previous message
GatsbysCruise is currently offline  GatsbysCruise   United States
Messages: 261
Registered: January 2017
Location: Waukegan, Illinois
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The REAR wheel well shells are not ideal in the way they seal from what I see.
I am ok with plastic, it won't rust but it should have gone down in front of the wood plys, protecting it from splash. Instead the plastic wheel well shell rests on top of the ply and some kind of goop is plastered over the ply.
- So my situation is, that goop has aged and cracked, fallen off in some places.
I have voids exposed and big concerns to protect the wood plys.

- anything with stickum, like waterproof tape with super stickum, does not want to stick to the plastic wheel well, at least not very well.
AND THE VOIDS, there are some spaces that were just gooped up.

- In my search to seal this up, I was wondering if filling the voids with expanding foam then covering with liquid rubber, like that stuff "as you've seen on TV", where they cut the bottom of a boat out and put in a screen then paint this liquid rubber and go screaming across the lake. would this work?

- My ideal plan would be to fill in all those voids and cover all the way down, over the ply so water would be most likely to just run off the sealant.

- The goop that I am finding is like a rubber compound that has hardened and cracked. I am guessing it is OEM as I have not seen a lot of upgrades from the 3 POs that owned the GMC before me.

- How about filling the voids with expanding foam, and coating with truck bed liner? The foam is firm enough after curing, the truck bedliner cures firm and pretty strong.

- Have any of you tackled this concern and is there a permanent repair and what did you use to seal over the ply? Did you fill the voids?

As always, many thanks for any information that you share.


GatsbysCruise. \ 74GMC260 Former Glacier Model style. \ Waukegan, Illinois \ Keep those MiniDiscs Spinning \ MY GREYHOUND IS FASTER THAN YOUR HONOR ROLL STUDENT \ WindowsXP-Win7-Win8.1-UBUNTU STUDIO - UBUNTU VOYAGER - Berzin Auto Center

[Updated on: Wed, 16 October 2019 11:04]

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