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Oil-Based Rustproofing

How Oil-Based Rustproofing works...

Oil-based rustproofing is the most forgiving way to treat corrosion. Our oil is formulated to displace moisture. The presence of oil will deprive the surface of oxygen. When you take either out of the equation oxidation cannot occur, so as long as the product is present, rust is held at bay.


NH Oil will simultaneously fight corrosion on a chemical level as well. The presence of the oil will form a barrier to protect the surface. NHOU is formulated to migrate and creep. This is especially important to the weak areas of a vehicle: rocker panels, door panels, etc., areas that are, by design ,prone to rust. The surfaces are generally unprotected with a finish (paint), prone to hold moisture and are very thin. Over the course of a warm month, it is not uncommon for our oil to move as much as several inches. In a cross member of a pickup truck bed, that would encapsulate the entire inside surface area. Having some surface rust can actually be a plus. Much like using an abrasive to scuff a surface prior to applying a finish, the rust will give the product something to hang on to.

How often should NH Oil Undercoating be applied?

While driving habits may vary, we recommend an annual application in order to maintain adequate protection.

What is NH Oil Undercoating® made from?

NH Oil Undercoating® is a highly refined food-grade mineral oil product. Formulated with the environment in mind, NH Oil Undercoating is a nonhazardous, unregulated product. It causes no health or flammability hazards.

Corrosion inhibitors are all green and environmentally friendly. Our oil has natural corrosion inhibitors otherwise known as “green inhibitors,” derived from plants and animal fats. It contains no solvents or detergents. It is an environmentally friendly product considering little to no dripping may occur. Our NH Back-N-Black has a biodegradable tint, otherwise the same as the clear product.

Will it void my warranty?

Absolutely not! Because NH Oil Undercoating® is an entirely different approach, it eliminates annoying electrical malfunctions and makes the vehicle work better and last longer. While the manufacturers probably won’t admit it, they just have to love NH Oil Undercoating® because it will reduce the number of corrosion related warranty claims they are obligated to pay.

Will it drip?

NH Oil Undercoating is formulated not to drip. However, minimal dripping may occur if the product is applied heavily. In most cases, clean up is simple: Dawn dish soap or Simple Green usually does the trick.

Do you clean the vehicle first?

If your vehicle arrives with a heavy residue of mud, flaky rust, it will be necessary to wash/remove before treatment. We recommend that any heavy accumulation of mud and dirt be pressure washed from the frame and wheel wells one day prior to the application.


Note, arrangements may be necessary to allow adequate time for preparation and additional costs may occur.

How long does it take?

Depending on the condition of your vehicle, the process can take anywhere from 1-4 hours.

Can it be done if the car is wet?

Of course it can. Because OIL chases water, it can be applied on rainy days. Water actually accelerates the creeping abilities because it moves quickly on wet surfaces to attack and displace moisture in tight seams and hard to reach crevices. Some competitor’s products are designed to mix with water with the idea that when the product drips off, the water goes with it-- not so with our products. We make sure that our chemical chases only the water from the metal. This is another reason why our products give longer lasting protection to your vehicle.

Will NH Oil Undercoating® harm electrical connections?

No. NHOU is non-conductive and will not harm electrical connections. Make sure that all connections are made before applying NHOU.

How soon can I wash my car?

You can wash your vehicle immediately after the treatment. Unlike other preventing methods, it will not trap moisture. It literally pushes it away, leaving behind a corrosion fighting lubricating film.

How is it applied?

NHOU is atomized under high pressure which pushes the product deep into the seams, cracks, and crevices where corrosion starts. Once applied, the product removes the moisture in these areas and provides a strong adherence to these surfaces, remaining active with excellent “creeping” and self-healing abilities.

Still have questions?

Please call or text: 248-469-4437

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