About Us

NHOU® Protective Coatings has grown from a part-time operation out of a family garage, to becoming a leading, globally recognized brand with the mission of protecting vehicles from corrosion. Whether it’s from road salt or humid environments, rust is a critical factor in vehicle trade-in value and safety. NHOU® is the fastest, least expensive way to add safety and value to your vehicles.

Your car—an investment second only to your home—is rotting out from under you.

But, you don’t have to choose between safety and cost.

We understand. We’ve been where you are!


Exclusive Formulas

Founder Joe Dupont works with a laboratory to engineer every NHOU® product—ensuring it protects and lasts. Each formulation is then tested at the NHOU® in-house lab in New Hampshire and on the thousands of cars treated there every year. Unlike other formulations, NHOU® Oil Undercoating creeps into all the little places where rust begins—ensuring every part of your vehicle’s undercarriage is protected.

Never Stop Improving

We’re always making our products better, constantly tweaking each formulation as the science progresses. As a family business, we’re 100% hands-on—working in the office, on marketing, applying undercoating to vehicles, training our dealers, and engineering new products to help people get more from the things they own.

At NH Oil Undercoating®, we’re committed to providing an environmentally-friendly product that once applied, stays on the undercarriage of your car and doesn’t drip onto your customer’s driveway.

My name is Joe Dupont. Nearly 10 years ago, I became frustrated and concerned about the rust overtaking my truck. Our mechanics told us there was nothing we could do to stop the rust. My truck was my livelihood. I needed it for my business.

For over thirty years, I owned and operated a kitchen and bathroom cabinet business. But, in 2010, money was tight. There wouldn’t be money to buy a new truck. We needed to solve the problem. I have many neighbors who have been spreading their used motor oil over their vehicles with great results. So I began to research how to stop our New England truck from rusting through and in Europe, we found an answer.

Rustproofing for them was wildly popular, reminding me of the rustproofing era of the 80s in the United States. Europe’s proactive action against rust was just what we needed. They used environmentally safe, effective, and inexpensive undercoating to protect their vehicles from the road brines corroding the undercarriage of their vehicles and we wanted to create the same.

As I’ve mentioned, we learned we aren’t the first drivers to be frustrated with rust and searching for a solution. Thanks to an early neighbor, I learned the importance of oiling the undercarriage of my car and in his explanation, he told a story of the farmers who discovered the best way to rustproof their farm vehicles.

The story goes that farmers noticed the lack of rust on their farm tractors where oil leaks happened. They would spread used motor oil on all the metal surfaces and boom they had a solution. Talk about recycling! The farmers discovered that not only did this technique stop rust, but they were able to utilize what otherwise would have been useless engine oil.

With over 15,000 oil coatings under our belt, we’ve expanded to include Rustorations®, wax/oils, protecting your vehicle from top to bottom!

Unable to find such a product on the market, we used a generic product (not engineered for the application) that was developed In the mid-1900s. Using the best technology available at the time, it was a lanolin-based product commonly used today in cosmetics. Sold as a multi-use product. In testing, however, it didn’t hold up to our expectations … so we went back to the drawing board.

Working closely with corrosion engineers, a team of chemists with over 40 years experience in automotive chemical coatings. we spent a number of years in research and development to create the most technologically advanced, environmentally friendly, and long-lasting product. NH Clear and NH Back-N-Black undercoating products are now being offered in hundreds of automotive stores and garages all across the country.

We want to involve our customers in our process, so they can see for themselves the benefit and cost savings of oil undercoating. From a window into the bay waiting room, customers are able to watch the entire process as we apply NH Oil Undercoating ®, then once finished, we invite them into the bay to see the finished application and answer any questions. Working night and day, we serviced just over 1800 cars in three months.

NHOU training facility

In 2009, we opened NHOU Advanced Rust Protection, in a one-bay garage next door to our home in Deering, New Hampshire. We installed a four-post lift, applied undercoating to my own vehicles, then offered to help friends and neighbors, and soon NH Oil Undercoating® was born. We are a family business and that includes our customers. We listen to our customers. We hear their concerns and we understand. We take to heart our social media reviews both positive and negative and as we educate our customers, they educate us on ways to improve our business, so we can get them safely back on the road.

Thank you for choosing NHOU® Protective Coatings!