Best way to treat 2016 Silverado frame

[Orangepeel]

I bought a very clean 2016 Silverado I wanted to undercoat it or similar but wasn’t sure what would be the best product for the job considering GM’s frames are coated in the black waxy whatever that is. Wasn’t sure if regular undercoating was best or something else a better idea. Thanks everyone!

 

[Sequoiasoon]

Any of the oily coatings (Fluid Film, Woolwax, Krown, NH oils, Blaster shield). Do not get any rubberized versions.

Noxudol has some waxy versions for inside channels also.

 

[GreyBrahms]

Nox-Rust X-121B based on forums is the OEM used chemical. When I had a GM I used for touch ups ever year and it blended in very well with the factory coating. Comes in aerosol can.

 

[Lubener]

I use Amsoil H.D. Metal Protector. At this point, I wouldn't use regular undercoating on a ten year old vehicle.

 

[nascarnation]

I'm a fan of Wool Wax because it smells good and is easy to spray on. I've had it on my 99 S-10 for about a decade.
If you're in a salt belt state and drive a lot of miles, you will need to do touchups every year.
Sure wish we would have had that when I lived in NE Ohio.

 

[mattd]

I would remove as much as the original coating as you can with a pressure washer and use Noxudol 300 and 700

 

[AdmiralYoda]

Any of the oily coatings (Fluid Film, Woolwax, Krown, NH oils, Blaster shield). Do not get any rubberized versions.

Noxudol has some waxy versions for inside channels also.

I vote Noxudol. It has a bunch of ingredients that attack existing rust. It will help render even microscopic corrosion inert while protecting against future corrosion.

Noxudol 700 is the cavity wax. It is a bit thinner and intended for inside frames, nooks and crannies like fenderwells, inner fenders, inside rocker panels, inside doors, etc. It is thinner and creeps well into tight spots and dries to a waxy film. It is thinner and easier to wash away which is why you use it in places that don't see direct exposure to weather.

Noxudol 300 is their undercoating. It is thicker but also wicks into tight spots but is a bit heavier and dries to a harder wax and resists getting washed away.

Both are available in a can for use in a spray gun and an aerosol.

 

[JTK]

I bought a very clean 2016 Silverado I wanted to undercoat it or similar but wasn’t sure what would be the best product for the job considering GM’s frames are coated in the black waxy whatever that is. Wasn’t sure if regular undercoating was best or something else a better idea. Thanks everyone!

Is this a job you want to do yourself? If not, what is offered locally? Like said, oil, lanolin or wax based products are what you want. Most all of them require yearly re-sprays if you want the best success.

 

[Ed_Flecko]

I don't have a recommendation for a coating product, but I do have a suggestion to keep your undercarriage clean; you could try a pressure washer "undercarriage water broom"?

This is what I have - https://westinghouse.com/collection...ater-broom-undercarriage-for-pressure-washers

Granted, I live in California so I don't have a problem with salt on the roads, etc., but I will tell you that this thing works like a charm! From time to time I spray the undercarriage of my truck with SuperClean and let it dwell for about 5 minutes. Then, I spray everything off with this water broom and my undercarriage is so clean you could probably eat off it (so to speak).

Just a thought.

Ed

 

[crashz]

I'm a fan of all the oil spray coatings and have used most. Any will be better than what you have now. I recommend that you clean the undercarriage well before you apply and avoid the brakes, rubber hoses and exhaust. Tin foil and covers can help.

You can go wild with this and pop body plugs and get in the the box frame to really coat everything. It takes time and usually a few tries to get everything covered. Be prepared to cover yourself and everything around you. And the biggest downside is that any work you do on the truck will be very messy.

 

[zrxkawboy]

I like Corrosion Free.

 

[KrisZ]

+1 on Corrosion Free, it's good stuff.

Pics of the undercarriage and close ups of the GM applied coating would be great. If the original coating is not dry and peeling off, but instead is still tacky, I would not attempt to wash it off. The only washing I would recommend it to the inside of the frame, as that's where dirt is likely accumulating.

If it's a wax type coating, it will play nice with oil based coatings, like fluid film or corrosion free. In fact it will help these oil based coatings cling better and longer to the frame.
Also, make sure you spray the inside of the frame, not just the outside.

 

[Donald]

Even if you use another product for most of the to undercarriage, NH Coatings sells a very thick product you brush on for areas that get a lot of road spray. It will last longer that ones you spray. So you spray some areas and brush other areas.

Some people take off the wheels and some may even take off the wheel liners.

Doing with ramps is do-able but a lift is better.

You might take it to a place to do it the first time and then do the follow-ups. They should have long wands to fit inside doors, box frames and other cavities. Those area will go for a long time before needing a follow-up. If ever.

If you have many shops locally that spray rust preventative products that's a sure sign you need one.

The best products creep, so if a rock or ice chunk scrapes some off when the weather is warm it will creep over the bare spot and protect it.

 

[Sequoiasoon]

Find out what Toyota used for their frame recall.

 

[Gus_Mahn]

Cavity wax inside the frame. Boiled linseed oil outside the frame every other year.

 

[Orangepeel]

I ordered a sprayer with attachments and a gallon of fluid film black. I plan on pulling all the body plugs etc as well as doing the entire frame. I have a lift so no issues there. I couldn’t imagine doing it on the ground . Heck with that!

 

[ClutchDisc]

You already ordered Fluid Film but for future reference WoolWax is the same stuff but thicker and it lasts longer. Its the only one I use now because of that. Fluid film always washes off very quickly for me.

 

[Orangepeel]

You already ordered Fluid Film but for future reference WoolWax is the same stuff but thicker and it lasts longer. Its the only one I use now because of that. Fluid film always washes off very quickly for me.

Yeah I’ve heard that but the fluid film was cheaper and I could get it quicker. I wanted to do it asap since I’m impulsive and will be at the lake all summer I like the black option they offer because the regular colored version looks gross on my Subaru. Not that many people are looking under it.

 

[ClutchDisc]

I like the black option they offer because the regular colored version looks gross on my Subaru.

WoolWax makes a black version too, maybe something for you to consider in the future!

 

[crashz]

The WoolWax (WW) does go on a bit thicker, but I've noticed very little difference between the black versions of each (WW vs FF). But WW sprays a little better. I don't know why, but it moves through the gun a little easier even though it appears thicker.

I sprayed my 2012 Silverado with FF when new, and kept up with regular application and it softened the wax frame coating, causing it to become a rust preventive goo. It worked well though. Took a few years to learn when every nook and cranny was that needed application, but I got it.