Truck Frame Undercoating

[maddogg]

I've been coating the underside of my trucks with WD40 with a hand held garden sprayer for years. 2 years ago I switched to Fluid Film and shoot it out of a cheap amazon paint gun. It works OK, but I usually microwave the FF first to make it flow a little better out of the gun. I was thinking of cutting it with bar and chain oil.

My question is, what does everyone else do - if anything?

I also do this on the trailer axles and rims.

 

[junior]

Lots of rubberized undercoating spray products

 

[indy_500]

I like amsoil heavy duty metal protector for rocker panels cab corners and door bottoms. I’ve sprayed the entire underside of my trucks before with schaeffers rust stop from work and it worked well which reminds me I need to do my new truck. Oil is the key to stopping rust. I take all the plugs out of inner rocker panels and door bottoms and shoot it up in there also.

 

[mrbb]

I tired so many things over the yrs and just gave up
spraying things,m washing things, you name it I tried it, NONE worked that great , or worth the added time and costs!

road salt gets into tight places , you just cannot get things into enough,
and as time passes , the salt and its residue just eats, this chemical solution they now spray is even worse
my last truck rusted out from under the paint and under coating, metal never seen salt and still failed after 7-8 yrs

best advice I think is trade truck in before it gets rusty?

like in a snow belt that uses salt, and its the nature of the beast!
sucks

 

[gary_in_neenah]

My 2 Cents; A heavy coat of wax from top to bottom every year about this time. Then during the winter months I use a car wash frequently, especially after trips to get the crud off.

 

[600_RMK_144]

I've been coating the underside of my trucks with WD40 with a hand held garden sprayer for years. 2 years ago I switched to Fluid Film and shoot it out of a cheap amazon paint gun. It works OK, but I usually microwave the FF first to make it flow a little better out of the gun. I was thinking of cutting it with bar and chain oil.

My question is, what does everyone else do - if anything?

I also do this on the trailer axles and rims.

I've heard really good things of the Fluid Film. And that the "stock" paint gun they sell with it works really well. Might make your life easier than the Amazon special? I just got a new truck and planning to use the Fluid Film w/ their paint gun before the season hits.

 

[maddogg]

I cut a quart of FF with a quart of bar and chain oil and mixed it up really well. It did spray easier then the straight FF and has a very tacky coating - almost like spray grease. Next year I'm just going to purchase the FF gun and hopefully get a larger compressor - the little 5 gallon 0 horse isn't cutting it anymore.

Thanks everyone.

 

[bedgar7]

I have been using Tectyl 506. It is a wax/grease type coating similar to cosmoline. It is rated at 2500 hours ASTM B117. It runs a little bit before setting up to get down into door seams and tight areas. I apply it using a pressurized undercoating gun I think it is a TP tools branded with a hand wand and a 360 degree spray for frame rails and doors. I shy away from rubberized coatings as I have seen them eventually dry out and crack, trapping moisture and causing things to rust faster.

 

[2003polaris]

Use transtar4423