Seam sealer recommendation
Hotshot
Joined: Oct 2004
Posts: 15,882
Likes: 88
From: Durham NC
I like 3M, but any of the higher end professional body shop stuff sold at your local auto paint supplier, is good. As Jules says don't use anything from your local hardware store or big box DIY store made for sealing tubs and windows. SEM is also a good brand and has several different products depending on where you plan to use it.
Welder User
Joined: Feb 2009
Posts: 5,269
Likes: 50
From: northwest MT
I would put some good rust proofing primer in that seam before sealer. They make DTM(direct to metal) seam sealers, but I personally don't care for them.....I doubt they provide any corrosion resistance.
Lead Driver
Joined: Aug 2006
Posts: 8,093
Likes: 652
From: Brentwood, TN
I use 3M 0308 exclusively for sealing seams. A little pricey but for as often as you use it, it is well worth the price knowing that it is doing the job. This sealer is also excellent for filling the drip rail trough...super bond and never shrinks or decomposes like the OEM sealer.
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Cargo Master
Joined: Oct 2010
Posts: 2,091
Likes: 599
From: Lancaster, CA.
So I should prime it first, then the sealer?
My plan is to put a couple more coats of epoxy primer on the cab. Do you think it would be ok if I spray some Rustoleum rattle can primer, seal the seam, then the epoxy primer?
Last edited by avf100; May 22, 2016 at 10:41 AM. Reason: .
Lead Driver
Joined: Aug 2006
Posts: 8,093
Likes: 652
From: Brentwood, TN
The seams on these trucks are notoriously "leaky". Here is a pic of my 56 after I applied KBS Rust Seal along the trough on the inside of the roof seam. As you can see, the sealer oozed through the gap in the seam. The Rust Seal product is a rust-encapsulator...I believe that I have a better repair now than I could have with a seam sealer or a spray on product. Good luck...
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Welder User
Joined: Feb 2009
Posts: 5,269
Likes: 50
From: northwest MT
I sanded the seam as best i could, then sprayed it with rustoleum rust reformer. Then I was going to apply the sealer.
So I should prime it first, then the sealer?
My plan is to put a couple more coats of epoxy primer on the cab. Do you think it would be ok if I spray some Rustoleum rattle can primer, seal the seam, then the epoxy primer?
So I should prime it first, then the sealer?
My plan is to put a couple more coats of epoxy primer on the cab. Do you think it would be ok if I spray some Rustoleum rattle can primer, seal the seam, then the epoxy primer?
I normally prime with epoxy, seal the seams, then prime with high build or primer/sealer.
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