Woolwax or Krown?

[Phishin]

Just bought new 2025 Silverado 2500.

I still have my 2018 Silverado 3500. The 1 ton has been treated with Krown every year without exception. No issues with corrosion, and the Krown keeps the waxy frame coating in great condition my moisturizing it and preventing it from peeling.

But I've been kicking around the idea of Woolwax. Or maybe just have it Woolwaxed now, let it sit for the that of the summer as a base sealer, and then have it Krowned this fall on top of it. Just Woolwax every 2-3 years to keep a nice "sealant" in the seems. Thoughts? What do you think?

Wish I knew a guy who could spray Cosmoline for me....Any actually do that?

 

[slacktide_bitog]

Either is fine. The most important thing is that you do it. There are so many oil undercoating products out there, but the most important thing is that you do it regularly; the brand name is less important.

As long as you don't use a hard coating like Ziebart, there is no problem. Ziebart and other tar-like hard coatings can crack and let moisture in but not out.

 

[sdowney717]

What advantage-disadvantage versus those products?
Use what is working for you?

 

[Rand]

woolwax is thicker fluid film and lanolin based used mainly for higher wash areas.. FF for in frame rails etc.
krown is petroleum based.

not sure how those would mix or interact.
I'd probably just keep doing krown.

 

[sdowney717]

Where we live, rare for them to brine the roads, but they will, and I avoid driving if I can.

Where I have my boat, very rarely super high tides flood the road 6" deep in salt water. I have driven through such water 4 time in 4 years.
I go slow. I drive a high up Ram 4 door 3500 dually long bed. 2005 with Cummins 4x4 and a 2005 with no rust. It has never been treated that I know of.

 

[Donald]

There are other products besides Woolwax and Krown that Trav and others think are better. But cannot remember.

NH Coatings make a thick brush on product you can use on areas of your truck where there is a lot of road spray. Then spray on normal products for the rest of the areas.

 

[Zee09]

Just bought new 2025 Silverado 2500.

I still have my 2018 Silverado 3500. The 1 ton has been treated with Krown every year without exception. No issues with corrosion, and the Krown keeps the waxy frame coating in great condition my moisturizing it and preventing it from peeling.

But I've been kicking around the idea of Woolwax. Or maybe just have it Woolwaxed now, let it sit for the that of the summer as a base sealer, and then have it Krowned this fall on top of it. Just Woolwax every 2-3 years to keep a nice "sealant" in the seems. Thoughts? What do you think?

Wish I knew a guy who could spray Cosmoline for me....Any actually do that?

View attachment 290256

Nice truck congratulations

 

[Geekhead]

Just bought new 2025 Silverado 2500.

I still have my 2018 Silverado 3500. The 1 ton has been treated with Krown every year without exception. No issues with corrosion, and the Krown keeps the waxy frame coating in great condition my moisturizing it and preventing it from peeling.

But I've been kicking around the idea of Woolwax. Or maybe just have it Woolwaxed now, let it sit for the that of the summer as a base sealer, and then have it Krowned this fall on top of it. Just Woolwax every 2-3 years to keep a nice "sealant" in the seems. Thoughts? What do you think?

Wish I knew a guy who could spray Cosmoline for me....Any actually do that?

View attachment 290256

I use Krown but after first application I go in every 2 years and ask them to not do doors/hood or trunk as they never rust. I only get the rest of the car like fenders and underside sprayed. I get usually a half price quote and I had a 24 Year old 1997 Tercel that did fine with this method. Also the rubber door seals/gaskets stay clean and rarely deteriorate or wear out.

 

[Donald]

I use Krown but after first application I go in every 2 years and ask them to not do doors/hood or trunk as they never rust. I only get the rest of the car like fenders and underside sprayed. I get usually a half price quote and I had a 24 Year old 1997 Tercel that did fine with this method. Also the rubber door seals/gaskets stay clean and rarely deteriorate or wear out.

Some need to worry about the rubber vacuum hose going to front differential for 4WD Ford pickup deteriorating from rustproofing spray. Ask me how I know?

 

[doitmyself]

My "going on 13 years" Jeep Patriot is Krowned annually. The dealer was so impressed with my rust free underbody this past June that he took pictures for Facebook. Paying them is one of my discretionary $$ I choose for piece of mind - the amount for dining out just a few times.

Yes, Krown has some complaints about turning rubber parts squishy. No problems for me, but be aware. Krown claims that even in high wash areas, a "molecular level" of protection exists. After a few years, it does build up a bit on the underside.

Our trusted member @Trav recommends Noxudol rust inhibitor. I would like to hear feedback of people that use Woolwax (does it creep?). It seems that Fluid Film has mixed reviews, but don't they all. I.E., Krown is a bit messy, drips, etc.. Pick your poison.

Paying to get the service done is like everything - you have to put effort into finding a good dealer.

 

[JTK]

With any of the oil, wax or lanolin based products, they all work the same way. They key is the regular re-application of the product based on your usage.

I'm big on Woolwax and FF and have been using those two exclusively since 2018. I have the spray gun kits and do the applications myself. For the past few years I've been using a 5gal bucket of WW I mail ordered. I put a bucket top pump on it and pump from the bucket, into the quart jars you use with the spray wands. For my Fluid film use, I buy FF in the aerosol cans when I find a decent deal on them. I used to buy FF in the gallon can and use my spray gun kits with it.

I like FF for cavities and WW for surfaces. Either can/will soften and swell very soft squishy rubber materials like some door seals and hoses.

I tried Krown one time in 2017-18 with my 2017 Ram 1500. I was not impressed with the application done by my local Krown dealer. It didn't look/feel like there was anything there after 6 weeks or so. I'm sure repeated applications would have built-up over time. When I get older and less apt to roll around on the ground under my vehicles, I'll probably use krown or whomever I can find at a cost that makes sense.

 

[KrisZ]

If you DIY, the options open up quite a bit. You can use thicker product on the underside so that it resist wash off better and you don’t have to do it every year.

But if you rely on someone else, Krown is hard to beat.

 

[BobsArmory]

Last fall I used 6 ish spray cans of Blaster Surface Shield on my GMC. Worked so well I bought a one gallon bucket of Surface Shield and a Wool Wax sprayer. Last weekend I reapplied the surface shield, about 1/2 gallon went on. The only areas that were washed off were on the lower control arms and the rear shock mounts on the axle. I was impressed with it's ability to stay on so well thru Michigan winters and frequent car washes.

The Wool wax sprayer works very well especially with the included 360 degree extension hose for getting into frame rails and other tight spots.

One part of my brain wants to do it in the middle of summer so the product flows better and has a chance to get "locked in" with road dust. The other half of my brain wants to do it right before winter.

Like Slacktide said, "The most important thing is that you do it. There are so many oil undercoating products out there, but the most important thing is that you do it regularly; the brand name is less important."

 

[doitmyself]

One part of my brain wants to do it in the middle of summer so the product flows better and has a chance to get "locked in" with road dust. The other half of my brain wants to do it right before winter.

Rust action is the worst in hot, humid,wet summer so that is when you want the best protection according to many. Winter is when you want the product preventing the intrusion of salty mist into the cracks and crevasses, to sit there until the weather turns warm and damp.

You are right, it's a dilemma. The enclosed pinch weld seams inside doors, rocker panels, fenders, etc.. does not matter so much. I get my car Krowned in late spring after any residual surface salt has had numerous rain events to wash it away, but before the peak summer heat/humidity. In late autumn before the first snow, I use about a half can of aerosol Krown to touch up the forward facing, high wash areas underneath my car. Supposedly not required, but it makes me feel good.

My vote: late spring application with late fall touch up. From a fellow Moo U area BITOGER.

 

[mattd]

There are other products besides Woolwax and Krown that Trav and others think are better. But cannot remember.

NH Coatings make a thick brush on product you can use on areas of your truck where there is a lot of road spray. Then spray on normal products for the rest of the areas.

The word you’re looking for is noxudol.

 

[Zenon]

Noxudol 700 and 300

 

[diesellover]

My work let me use their krown and the tools to install it on my 00 camry. It really stayed in place! I did do it 2.5 times. I did also drive it over a dirt road while wet to "seal" it on there and keep it from Dripping.

I didn't work there any more and nearly 2 years later it was indeed still in place!

Very important to pressure wash and let the under carriage dry. Very important to do it in warm temperatures so it bakes into the metal!

The two years after that I actually bought gallon paint cans of fluid film and installed it with a paint brush! Terrible job but it really held up that way too. Still haven't bought a spray product yet.

 

[Geekhead]

With any of the oil, wax or lanolin based products, they all work the same way. They key is the regular re-application of the product based on your usage.

I'm big on Woolwax and FF and have been using those two exclusively since 2018. I have the spray gun kits and do the applications myself. For the past few years I've been using a 5gal bucket of WW I mail ordered. I put a bucket top pump on it and pump from the bucket, into the quart jars you use with the spray wands. For my Fluid film use, I buy FF in the aerosol cans when I find a decent deal on them. I used to buy FF in the gallon can and use my spray gun kits with it.

I like FF for cavities and WW for surfaces. Either can/will soften and swell very soft squishy rubber materials like some door seals and hoses.

I tried Krown one time in 2017-18 with my 2017 Ram 1500. I was not impressed with the application done by my local Krown dealer. It didn't look/feel like there was anything there after 6 weeks or so. I'm sure repeated applications would have built-up over time. When I get older and less apt to roll around on the ground under my vehicles, I'll probably use krown or whomever I can find at a cost that makes sense.

On my doors hood and trunk 1-2 years later I'm still periodically wiping oil from the weep holes from my Krown application. I think my local franchise is quite liberal in product application.