So after being freaked out by all the frame rot threads here and around the internet I would like to ensure that I am not doing this anytime soon:


Waxoyl comes highly recommended but at a steep price. We got our Discovery from down south and there was not a spec of rust on the undercarriage when we got it but after two winters here in MA I am seeing some areas starting to rust.

Does anyone have any Waxoyl DIY alternative suggestions? So far my plan is to wirebrush and touch up some areas with rust converter and a rubberized frame spray for the exterior areas. However inside the frame rails and other hard to reach areas in another story. Whats worked best for you?

 

Get a hold of Zach a.k.a. ZGphoto avatar for some pointers. He works at Rover's North.

 

Closed cell foam sealant, here. No water no cry!

 

Really Dusty? You mean like expanding polyurethane foam? I'd be worried about trapping water in weird places.
As a Canadian, my feeling is just undercoating, lots of it, and every year. And even then, I'd love to be able to just dip the whole truck in a giant vat of the stuff twice a year.
I'm curious about these new nano-scale hydrophobic treatments (like Rust-Oleum NeverWet®). It would be interesting to experiment from new with them.
I'd also like to try applying them to the electrical — last time I went wading I was clearing codes for about a week.

 

The issue is getting it inside the frame. The foam can do that quite easily seeing that it expands. But how would you get a spray inside easily enough to coat the entire frame.

 

You can get a ball wand and tube to feed along the chassis, how effective it is may be debatable. Accessing the cross sections and any outriggers could prove difficult if not impossible. Waxoyl is great on new or nearly new trucks but once the dreaded rust has set in I think it's a waste of time. I'm not convinced about rust neutralising treatments either.

 

SO, for this foam, couldn't I just add a retarded long tube onto the can/sprayer and feed it most of the way through the front of my frame and just apply it and slowly pull it out?


Dusty what foam did you use? I'm interested in doing this myself.

 

iirc it was gorrilla. i just made sure it was closed cell. I used a few feet of clear hose and slipped over the nozzle.

 

The only way I can see of a DIY application is the drill some holes (say 3/8" or 1/2") alternately each side, say about 2' apart and then feed in the expanding foam and check for egress from the next hole or use a boroscope to check https://www.google.fr/search?q=boros...w=1164&bih=611

To be safe against water uptake or entrapment you will need to use a quality closed cell polyurethane type foam, typically, a marine foam Urethane Foam , Expanding Marine Polyurethane Foam

 

Oh marine foam. Duh. I built a fiberglass boat and insulated it with that stuff last year. I'll just weld a tab over every hole in the chassis, no water will get in.