Looking in to under body, under coating, I am on eastern seaboard, and winters lately, VERY VA DOT salt heavy. Recommendations?

 

I like Fluid Film because it's cheap and can be re-applied easily in my driveway. It does leave the underside of your truck a grimy mess, but I'd rather deal with that then rust.

Be very cautious of under coatings that dry because some will crack and allow moisture to get underneath and cause serious damage.

 

I agree with fordman19762003....you don't want something that will harden and then crack (heavy tar based coatings)....because moisture will enter those cracks and start rust from the inside/out.

Since the Super duty is now all aluminum, there is no reason to coat all of the undercarriage...just the frame rails, front and rear suspension parts.

 

The SD is not all aluminum. The frame rails are electrostatically coated and the suspension parts will last for years, even in a harsh environment. The concerns are the ancillary components. Body mount brackets, fuel tank brackets, brake lines, bumper brackets, hitch components, running board brackets, spare tire winch and spare tire wheel, well you should get the idea.

 

Welcome new guys and thanks for your participation. But just as a side note to some of the newbies here, there is a 2 day old thread about undercoating. And this is only one of many threads which have become multiple on the same subject. Sometimes it is worthwhile to peruse the existing threads prior to starting a new thread every time a question pops into your head. The entire forum is getting unreadable because of duplicate subjects The forum platform has several options to peruse new posts and an excellent index with which to find existing information and a place to ask questions without cluttering the forum with same subject threads.

 

One reason is sound dampening, it literally is night and day how much quieter the truck is.


BTW, not everything on the all aluminum Fords is aluminum....there is some steel.

 

I would still coat the aluminum parts. Aluminum doesn't rust like steel but it still corrodes, just a lot slower.

 

Generally a waste of time, and I used to live in Upstate NY and had 2 Trucks Undercoated ... They will give you a rust-through warranty of 10years but the trucks will still rust through, it just takes closer to 13-15 years... I had my brand new 89 Bronco Undercoated with less than 50 miles on the ODO... Paid like $750 if I remember right... Took apart the driver and passenger door interior panels to install some speakers a year later, and the undercoating wasn't evenly applied, not did ANY of it get down to the bottom of the door where the moisture/salt collects that gets passed the window seals... The tailgate had may one quick 12" wide squirt of undercoating and that was it... It's currently in my yard, rusted through both doors and the tailgate, as if it never had any rust prevention whatsoever...