How to PROPERLY Undercoat A Rusted Car or Truck. (Fluid Film Surface Shield, Woolwax)

How to PROPERLY Undercoat A Rusted Car or Truck. In this video we are going to go over the proper application of a Lanolin based undercoat on a vehicle with existing surface rust on it. We are going to cover why traditional paints and rubberized undercoating fails, why Lanolin is a much better option for undercoating vehicles, and the process required to properly undercoat your car or truck. I will also answer frequently asked questions about Fluid Film, Surface Shield, Woolwax applications.

Here are the tools that I used in this video:

Bulk Products: (Compressed air required)

Aerosol Products:

Help support the channel, buy using my Amazon links
As an Amazon Associate I earn from qualifying purchases and your cost is exactly the same.

00:00 Introduction
1:31 How to stop rust
2:32 Why traditional paint/rubber undercoating fails
3:44 Why Lanolin/Petrolum undercoating works better
4:27 What about painting first then applying Lanolin?
5:30 Coating internal surfaces
6:34 What about cosmoline?
9:24 What product is "best"?
11:43 Equipment needed to spray bulk product
13:43 Aerosol attachments
14:56 Vehicle that we will be coating
15:46 Equipment needed to prep a rusted vehicle
17:46 How to prepare the rust
19:23 Body plug removal
19:56 How I spray the vehicle
22:59 Results after spraying clear undercoating. Reapply in a week or so.
24:13 What about GM wax frames?
25:14 Do I mask off anything before I spray/Issues with rubber???
25:53 Do I wash the bottom of the vehicle?
27:20 Still have questions? Make a comment!

Disclaimer:
The information, demonstration and any content contained in this video is for informational purposes only. The user Repair Geek makes no warranty, express or implied, regarding the effectiveness or safety of the contents of this video. In no way should the contents of the video, including the tools used, be repeated or tried by anyone. Viewers should only seek the help of a trained professional located at a licensed auto repair shop for any fix, modification, alteration, or any change to their vehicle. Repair Geek shall not be liable for any injury, damage, or loss to any person or property that may result from use of the tools, equipment, or any content contained in this video. In addition, there is no way to guarantee that the video is not altered or modified or is not in the final form submitted by Repair Geek and therefore, Repair Geek does not warrant that the video is unaltered or not modified. The links on this video to products are for informational purposes only and in no way are an endorsement of the safety or effectiveness of the particular product. Viewers understand that anything contained in this video or linked to or from this video is the sole responsibility of the viewer and in no way provides an express or implied warranty as to the safety or effectiveness of any linked tool, product, or video. Therefore, viewer agrees to release, waive, and discharge Repair Geek or anyone affiliated with Repair Geek, from any and all liability, claims, demands, actions, and causes of action whatsoever arising out of or related to any loss, damage, or injury, including death, that may be sustained by the viewer, or to any property belonging to viewer, regardless of whether the loss is linked to the use of the contents of this video, or otherwise and regardless of whether such liability arises in tort, contract, strict liability, or otherwise, to the fullest extent allowed by law.

[RepairGeek]

Here are the tools that I used in this video:

Bulk Products: (Compressed air required)

Aerosol Products:

Help support the channel, buy using my Amazon links
As an Amazon Associate I earn from qualifying purchases and your cost is exactly the same.

[bradboustead]

Tip for the DIY guys doing this laying on your back in the driveway: Park your car on a big sheet of plastic. Raise your car up on 4 good jack stands. Tape a plastic skirt around the sides. Weight down the bottom edge of the plastic skirt. Put a fan at one end to draw air through the tunnel you created. Wear a hoodie, old clothes, and some sort of face cover.

[Random-rtec]

Boston, MA area - Thanks to Fluidfilm & Woolswax my 2010 Crown Vic is rust free. I spray the undercarriage in the heat of August giving it time to ooze into all the crevices.

[dkeith]

Of the MANY rust proofing videos I've watched, yours is the best IMO OP.

[ctchuteflyer]

If you are using ramps, I've found it easier to ramp up the sides of the vehicles rather than front and back. It helps with better access and more space one side at a time vs front and back.

[schassis_eddi]

What about touching up the exposed metal with rust converter and primer and then put the lanolin on????

[Toby_Flenderson_]

So I've been noticing surface rust on my 1-year old tacoma in Dallas. I have seen other tacomas and toyota vehicles a few years older here with NO rust at all. So I'm pretty annoyed by that and have been attending youtube university recently and your info is definitely the most helpful. The single best bit of info that I just learned here, which really surprises me, is that you can apply these something like fluid film over surface rust and that will totally stop the rust. I thought rust was basically a terminal cancer that you had to root out one way or another. So, based on the fact that my rust is very, very thin surface rust, I plan to just apply fluid film over it and call it a day. Huge win. THANK YOU

[xIrHaxor]

Michigan native here and they salt the roads like mad. I noticed after undercoating (done before winter started) my XJ that salt does not stick at all to the bottom of it, its amazing lmao.
will be doing this every year from now on. and if anyone is curious it took me about 3 full cans of the Surface shield aerosol to coat everything on the bottom.
thanks for another great video!

[johnnyray]

I learned to do this as an apprentice over in Germany at an Opel dealer. We used to power wash the under side of a car let it dry then put it the paint booth for a few hours @ 130 if I remember correctly. Your video was a great refresher. Good job and great content, thanks!

[justincase]

This is brilliant... I've spend years thinking about this topic and while most of what you instructed is known to me but so much of it is not in my mind. You have pulled it all together and provided examples of success and failure that I've never seen anyone else do. This is THE Best resource on the web.

[samsaunders]

Gonna be working on my rusty old van, thank you so much for making this video easy to understand for those of us who are new to working on cars. So much of the information out there is geared towards people who already know what theyre doing, what the tools are and all of that.

[stonepa]

Been using lanolin based products on my cars here in lovely Cuyahoga County, OH for many years. What a godsend. Toyota truck looks like new after 8 winters while my many neighbors and their untreated trucks rot away. And they think I am nuts. 😂

[reedstemen]

Thanks for the information, these lanolin and cosmoline products have made a huge difference in the long term quality of my vehicles vs trying to sand and paint everything, and there is a massive time savings. Thanks for spreading the word to help other mechanics.

[vadrifter]

As I have stated before. I truly appreciate your continued commitment to stopping rust on our vehicles. I had new rockers and cab corners put on my '03 Silverado last year. They put in a few holes so I can get inside with a wand. I ran the truck up on jack stands and used a hand held wire brush. Eight cans of Wool Wax later and the whole underside was done. Also was able to get the spare tire down for the third time in the life of the truck. Side benefit, Wool Wax lubricated the lowering/lifting mechanism for the spare tire. Believe me it did not want to come down. THANKS AGAIN!!!

[OutsideTheTargetDemographic]

I had several questions about coating the underbody when I started this video. I no longer have questions. 😁👍If an ignorant guy like me can get familiar with the process after a video, then you did a good job explaining.

[TeenDream]

my friend fell into severe medical debt and is looking at selling her newer car for a reliable 2000 Mazda Protege ES. since rust is a _huge_ issue with that model, we've been looking at videos for coating the undercarriage and yours by far was the *best* . thank you for the detailed instructions and hopefully if everything goes well for her, she'll still have a reliable car that will last her a few years until she gets back on her feet!

[WhitieMcWhite]

Great video. I do my vehicles every fall when I swap to snow tires. One thing I like to do is I put plastic garbage bags around the rotors/calipers before I spray so whatever product I'm using doesn't contaminate the brake pads.

[pnkpnthr]

I find this video searching for fluid film on YT. I now follow this channel due to the expertise and thorough knowledge shown in this video. Thanks for your help.

[alphaomega]

I've been working underneath my 05 f150. A lot of places are full of mud and sand. The front fenders are the worst for collecting crap behind the wheels. I highly recommend hitting the underside of trucks with a pressure washer.

[marcok]

I spent a lot of years working at Sherwin-Williams, one of the biggest things that we tell all of our customers during paint preparation is make sure everything is clean dull and dry. As far as Coatings go this gentleman has a good perspective on how to prep and keep your vehicles lasting longer. If you are going to use a cheaper route like say Grill paint or barbecue paint I would find a place where you can get the humidity down to absolute zero and even then I'd be willing to use a heat source to make sure that you have no moisture at all trapped inside as he said earlier if you put a coating on top of something that is containing moisture it will eventually pop the paint as the sun is the greatest natural puller. That's why you see so many houses on the west side that have their paint popping is because they did not get it completely dry they put a coating on top of it and then the sun hit it and it pulled out all the moisture. Would I can take away from this video is he was true and honest and no matter what you use make sure that your surface preparation an adequate dry time are impeccable to have any chance to survive❤