Seam Sealer
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Laughing Gas
Joined: Jun 2004
Posts: 823
Likes: 4
From: Calais, Vermont
Seam Sealer
I hope to paint my truck this month. I am wondering where seam sealer should go: over bare metal or should I prime first? I am using seam sealer at the interior joints in the cab sheet metal. Is this same sealer what I would use at the "gutter" above the windshield? I have two types. One is a brush on consistency. The other is more of a trowel on consistency that is applied using a caulking gun
Welder User
Joined: Feb 2009
Posts: 5,269
Likes: 50
From: northwest MT
Any joints or seams need to be cleaned really well. I always prime first with epoxy primer, sometimes using a small brush if it's not possible to spray an area.
There are direct to metal sealers, but I'm still leery about putting sealer over bare metal.
Use a quality sealer however you apply it....
There are direct to metal sealers, but I'm still leery about putting sealer over bare metal.
Use a quality sealer however you apply it....
Cargo Master
Joined: Mar 2001
Posts: 2,759
Likes: 71
From: Elk River, MN
I have had really good results using Eastwood's Coraless seam sealer, my body work mentor liked it so much he started using it also. We always clean the joints and paint with primer before filling the seam with brush on sealer. The final product paints over nicely but I have only used it for interior seams.
Lead Driver
Joined: Aug 2006
Posts: 8,094
Likes: 654
From: Brentwood, TN
I agree with tinman52, you want as much protection as possible under the sealer. I use 3M 8303 heavy bodied seam sealer exclusively. This is a 2-part catalyzed product which sets very quickly...like 10 minutes. In the drip rails I use a popsicle stick to smooth the sealer and give it a nice smooth shape, looks better than the factory sealer and will last 10 times longer!
Here is the underside of my 40 Ford coupe with the seams sealed and bare metal treated with KBS Rust Seal. Bedliner was applied over the whole floor as a final finish.
Here is the underside of my 40 Ford coupe with the seams sealed and bare metal treated with KBS Rust Seal. Bedliner was applied over the whole floor as a final finish.
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