"Where did the rust go?" Find out in the 5-part detective series: RUSTY UNITS RUSTY UNITS: An Undercoating Detective Story | Watch Now

Frequently Asked Questions

Q. We use Undercoating In A Can in our shop. Are there any concerns spraying your product onto Chevy trucks with the wax based material the factory uses? Will it drip?

View Answer

The Original Black Wax is compatible with the hot melt dip factory wax applied to GM SUV's and Truck chassis. The Original Black Wax has good sag resistance but will drip if over applied.

Q. What is the shelf life of the 12oz aerosol can ?

View Answer

We typically do not provide a shelf life our Undercoating in a Can aerosol products. This is primarily due to having no control how the product is stored when it is not in use.

The non-aerosol packaged Undercoating in a Can products are good for 2 years from date of manufacture but they typically last much longer.

Q. Just wondering if your product can be applied on vehicles that have been previously undercoated with lanolin based products, such as Fluid Film, Protection First Class, or Wool wax?

View Answer

The annual or semi-annual undercoat products like Fluid Film, Wool Wax, NHOU, PFC and our Undercoating In A Can Clear Fluid Coat deposit an oil film onto the underbody substrates. That oily film does not permit good adhesion with the substrate. Our wax (Black & Clear) and Rubberized will adhere in areas where the annual undercoat has been washed away but we do not recommend coating over the annual type undercoating with anything other than another annual undercoat like our Clear Fluid Coat.

An aggressive power washing that removes the annual undercoat oily film can provide a clean surface that can be coated with our wax and rubberized products.

Q. I'm interested in purchasing your Original Black Wax. I have a 2004 Dodge Ram but my question is, do I have to clean and remove rust before applying? I do have some rust in areas, and dirt in others.

View Answer

The maximum performance of the Original Black Wax is achieved when the substrate is clean, dry, and free of rust, oil and mill scale. Any coating performs best when applied over a properly prepared surface. However, the Original Black Wax will perform well over less than perfect substrates. If the rust/corrosion is tightly adhering to the metal, you will still receive good protection, but any loose rust or scale should be removed first. Typically, a good pressure washing of the underbody will prepare the substrate for the wax. If the product is applied to the recommended dry film thickness of 5 mils dry, you can expect up to 5 years of corrosion protection. The substrate preparation plays a significant role in the long term performance of the coating.

Q. I recently bought your product and sprayed it on my undercarriage, and it looks fricken awesome- I love it! I'm curious, can I wash it and still be okay? Do I need to do more than one coat? I use my vehicle daily, and I do a lot with it from hunting to hauling boats and trailers to driving gravel roads.

View Answer

If 5 dry mils of Original Black Wax are deposited onto a substrate that is clean, dry and free of rust, oil and mill scale, you should have excellent corrosion protection. You can check the wax film thickness with an UCIAC film thickness gauge.

The undercarriage can be pressure washed, however, prolonged application of the pressure wash nozzle to one area less than 4 inches from the surface may damage the wax.

Q. I'm looking into the Rubberized product, and cannot find the coverage rate per can in your Product Data Sheet (PDS). Do you have an approximate square footage one can will cover at 1 mil, dry film thickness (DFT)? The PDS recommends the coating to be applied at 8-10 mils, can this be achieved in a single coat using the aerosol spray can? Can you tell me what the wet film thickness is to achieve 8-10 mils DFT?

View Answer

The Rubberized theoretical coverage is 7.5 square feet/can at the recommended DFT. We did not check the coverage at 1mil, but your inquiry may result in our folks looking into it. The sag resistance of the Rubberized should permit you to apply the recommended film thickness in a single application. It will require more than 1 pass over the substrate surface. You would have to be moving the can quite slowly to achieve the required film thickness with one pass. I am differentiating between 1 single coat and 1 pass over the substrate.

Q. What is the best thinner for your Rubberized Undercoating?

View Answer

It can be thinned with Xylene, Toluene, Acetone or VM&P Naptha.

Q. How many cans will I need to buy for my Ford F-150 Club Cab?

View Answer

To achieve the proper wet/dry film build 12-15 cans are required to cover the entire undercarriage.

Q. Can Original Black Wax be thinned down for use in my undercoating gun?

View Answer

If necessary the Original Black Wax can be reduced with mineral spirits up to 5% of the volume of the full bodied product to lower the viscosity. You can also reduce the Rubberized up to 5% with Acetone, Toluene, Xylene or lacquer thinner. If you reduce the product please ensure the correct wet/dry film thickness is deposited on the substrate to achieve the full protection afforded by the full bodied product. Both products film thickness can be measured with our wet film thickness gauge. The wax can be measured with that gauge after the mineral spirits has evaporated too.

Q. I have a 2004 GMC 2500 HD with a recent 5 year old frame. I took the bed off and pressure washed the frame. The factory wax was soft and some washed off in spots. Is this product compatible with the factory wax to touch up the bare spots, cover up some minor rust and recoat the rest as needed?

View Answer

The Undercoating in a Can is compatible with the Hot Melt Dip Wax that GM applies to their Trucks and SUV’s. The factory wax is almost 100% volume solids. It has to be heated between 260-300F for the application. The Original Black Wax is at 50% volume solids so it is a wax cutback with mineral spirits. The aerosol version also has the required propellants to atomize the wax.

Q. Do you sell an undercoating that can be painted?

View Answer

The Undercoating in a Can Rubberized is formulated to provide excellent corrosion and abrasion resistance and it can be top coated with automotive grade paint after the Rubberized has fully cured.

Q. What is the coverage in square ft. of 1 qt. of your brushable Rubberized undercoating?

View Answer

The Rubberized at the recommended film thickness of 8-10 dry film mils will cover 49-62 square feet per gallon. At 10 dry film mils it covers 49 square feet and at 8 mils DFT it will cover 62.

Q. Can this undercoating be applied to plywood underneath a camper?

View Answer

The Original Black Wax and Clear Wax are excellent sealers for wood. The largest shipping company in the US specifies the wax to protect the steel undercarriage and wood floors of their over the road trailers. Trailer manufacturers apply the wax undercoating to the entire steel and wood undercarriage of the over the road trailers because it seals the wood and repels moisture. It is abrasion resistant too so it protects the wood from road debris that may be propelled into the wood.

Q. I'd like to apply this to the under carriage of my vehicle, can it be brushed on? I don't have the clearance and I have to be under the vehicle with jack stands to accomplish this.

View Answer

The coating can be applied with a brush or roller. You may have to reduce it slightly with mineral spirits (no more than 5% of the volume of the full-bodied product). It will also be important to ensure you deposit the minimum of 5 mils dry. A wet film thickness gauge will help with the measuring the coating thickness. The gauge can be used when the product is freshly applied or in its cured state. The aerosol application can be conducted relatively easily with the car up on jack stands. The Original Black Wax has good sag resistance so it should not be falling all over you.

Q. I live in Utah, with the winter coming up, will lower temperatures affect drying times? During the 24 hour curing process should the car not be driven?

View Answer

Lower temperature does extend cure time but the car does not need to sit idle for 24 hours before driving. If you can give the coating a couple of hours to set up, you will be fine to drive it. The water resistance for the waxes and rubberized occurs quickly after application. None of the products are water based, so they will not freeze.

Q. Wanting to see if the Undercoating Wax will be a good product for my 2004 Ford Excursion. It has a little surface rust on the frame but nothing bad. Just from driving it on the beach and ocean water starting a bit of rustiness. Would this work to treat the frame and axles?

View Answer

The Original Black Wax performs well over light surface rust. It will encapsulate the rust and cut off the oxygen and repel the water necessary for continued corrosion. The wet film thickness gauge will ensure you deposit he required amount of wax for maximum protection.

Q. Can Original Black Wax Undercoating in a can be applied to the wood floor of a trailer?

View Answer

Original Black Wax can be applied to wood but it should be the underside of the wood. It is not suitable for wood that will receive any pedestrian traffic.




Contact Us

Let's Get In Touch

Newsletter

Subscribe to get product updates

‚Äč