Drip Rail Sealant

[TravisB]

Hey guys, it’s been a while since I took my truck apart and had it sand blasted. It’s at the body shop now and I’m curious if there’s meant to be any sealing layer or glue strip between the drip rail and the cab to keep water from the fastener holes.

Do they glue and screw or just screw on and then everything gets pained before the chrome strip is applied?

 

[Old Guy Bill]

I don’t know about what was used originally but I used a very thin layer of black RTV when I put mine back on.

 

[Russtypickle]

Ya, I used seam sealer in mine to help keep moisture away. Once moisture gets in there it's hard for it to dry out.

 

[bucket]

I don't know what GM used on them, but a lot of 80's and 90's GM cars used a thin, sticky back sealing tape on weatherstripping rails and things that were attached the same way as the squarebody drip rails. The mounting screws usually had some type of goopy/tacky sealant on them as well.

It worked well, there was no chance of making a mess and the parts could also be removed and easily reinstalled as well.

 

[Keith Seymore]

I don't know what GM used on them, but a lot of 80's and 90's GM cars used a thin, sticky back sealing tape on weatherstripping rails and things that were attached the same way as the squarebody drip rails. The mounting screws usually had some type of goopy/tacky sealant on them as well.

It worked well, there was no chance of making a mess and the parts could also be removed and easily reinstalled as well.

This is correct.

K