Rubberized undercoating

[Roc Doc]

So you fuckers that live in the rusty part of the world, I'm going to be installing some stuff that will require me to run sheet metal screws through the floor of my F150, and I want to seal up these penetrations. 3M, Rustoleum, Duplicolor, etc. all make such. Is there any better than the others?

 

[jeepnmatt]

i use this for things like that: OSI® QUAD® Carbon Black Color 003 Window, Door & Siding Sealant - 10 oz.

it is cheap, available, and has enough VOC's to work well.

 

[Tiha]

I have never noticed a difference in undercoatings. Just get 3 or 4 good layers on.

If it is protected area then never worry about it again.

If it is subject to splash and road debris, inspect and recoat as needed yearly.

 

[Will12785]

The rubberized stuff is about all the same in my experience.

 

[zlathim]

If it's just a few screw holes and not the whole underside, any black rtv would work.

 

[SomeGuy]

All I've ever done is black rattle can or bedliner spray when installing whatever it is and then fluid film yearly coatings.

 

[subybaja]

I like Waxoil or Woolwax better. It can't de-laminate and cause rust.

+1 for RTV on little spots.

 

[Roc Doc]

If it's just a few screw holes and not the whole underside, any black rtv would work.

Good idea. Thx

 

[Boss]

Duplicolor sucks ass

 

[Zg86]

Put the rtv on the screw before driving it in and be done with it

 

[Roc Doc]

Put the rtv on the screw before driving it in and be done with it

I'll be going through carpet, don't want to make a mess of it.

 

[FlatLander]

"We're gonna test that."

 

[87manche]

I'll be going through carpet, don't want to make a mess of it.

Heat up a rod or pipe and melt through the carpet before you drive screws.

 

[Roc Doc]

Heat up a rod or pipe and melt through the carpet before you drive screws.

Good call.

 

[71PA_Highboy]

Good call.

I use a 16p nail, vise grips and a propane torch....