I'm having to replace a corroded side-mount gas tank on a 96 F250, along with the vapor line. I'm ready to install the new tank, but feel like I need to coat it(and the strap hangers) with something to prevent having to do the same job again a few years hence. I'm a little pressed for time and am thinking of using rubberized undercoating, since I'm thinking it dries pretty fast. Am I correct? What would you do?

Thanks as always, friends, for your time.
Andy

Spray-on bedliner.

Russ

No matter what you use, surface prep is EVERYTHING! All I can say....

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I used to use zinc chromeate works real good, that bed liner stuff should work well, the chromeate is not good for your health.

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Don

Thanks again, fellas.

The undercoat will work OK it the corrosion came from the outside-in. If it came from the inside out like a lot of tanks are doing with this garbage gas we get pawned off on us now, use a tank liner. I use a brand from O'Rileys. For a big tank, mix the coating with IIRC MEK and pour it in and turn the tank every which way possible. Pour out any excess and let dry.
If you are getting corrosion around the straps, I think I would add some ground (bonding) straps. Anyone of the guys here that have ever worked on aircraft can attest to the seemingly excessive use of them in a plane and even boats and water heaters have a sacrificial anode to cut down on corrosion.
Larry

They used to use tarred webbing between the brackets and tanks.

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Gunsmithing since 1961