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Frequently Asked Questions

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?

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. 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.

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. 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?

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.

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

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 an 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.

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?

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

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


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?

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.





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