NHOU® is a highly refined, food-grade mineral oil—nonhazardous, solvent-free, and environmentally friendly. It contains natural “green” corrosion inhibitors derived from plant and animal fats and is safe enough that even accidental pet exposure has proven harmless (though we don’t recommend it!).

Unlike traditional hard coatings, NHOU® stays soft, allowing it to migrate and creep into hard-to-reach areas like rocker panels and door cavities—places most prone to rust. It displaces moisture, blocks oxygen, and forms a lasting barrier, stopping oxidation before it starts.

Even light surface rust can help—it gives our oil something to grip, much like prepping a surface before painting. The result: durable, self-healing protection, even in the toughest conditions.

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.

While driving conditions may vary, we recommend an annual NHOU® application to ensure consistent protection.

Think of it as affordable insurance—a small yearly investment that adds long-term value, safety, and rust protection to your vehicle.

NHOU® is formulated to be low-drip. Often times there is very little to no drip at all. In cases of heavy application, some dripping may occur – easily cleaned with a dish soap and water mix.

NHOU® typically requires at least several hours to dry  properly before you can use your vehicle again. We will ensure your vehicles application sufficiently dries inside of our shop for best results.

Absolutely not! NHOU® takes a completely different approach—eliminating electrical issues, improving performance, and extending vehicle life. It even helps reduce corrosion-related warranty claims, which benefits both manufacturers and drivers. That’s why it’s trusted and used by leading automotive dealerships nationwide.

No, NHOU® is non-conductive and will not harm electrical connections.

Yes—our oil-based formula chases water, allowing for application even on damp days. In fact, moisture can enhance its ability to penetrate tight seams and crevices. Unlike products that mix with water, NHOU® displaces it—ensuring better, longer-lasting protection.

Best results are archived with a clean and dry undercarriage, so washing your car before service is advisable. If your vehicle has heavy mud or flaky rust, it should be pressure washed, especially around the frame and wheel wells, ideally a day before service.

After application, you should wait at least 3 days before washing your car. Undercarriage washing should be avoided in general, especially high pressure washing.

The bulk flash point of NHOU® is 425F/220C.

You may notice smoke and odor from the underside of the vehicle the first time the vehicle is driven. This is due to a small amount of overspray vaporizing on the exhaust system. It is harmless and should cease quickly.

You may hear a slight grinding noise after application. This is typically caused by minor overspray on the brake linings and is not a safety concern. The sound should stop after a few normal braking cycles.

NHOU® products do not prevent scratches, peeling paint, or stone chips. Prompt repair of any exterior paint damage is recommended to prevent surface rust or corrosion.