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Built to Defend. Engineered to Last:
Founder Joe Dupont works with a laboratory to engineer every NHOU® product—ensuring it protects and lasts.
Hands-On Authority:
With more than 25,000 oil coatings under our belt, we now offer Rustorations®, premium waxes, and specialized oils to protect your vehicle—top, bottom, and everything in between
CONTINUOUS IMPROVEMENT:
NHOU is always making our products better, constantly tweaking each formulation as the science progresses and evolves.
What We Couldn’t Buy, We Built:
NHOU® has grown from a part-time operation out of a family garage, to becoming a leading, globally recognized brand.
Your car—an investment second only to your home—is rotting out from under you.
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.
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.
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.
From Our Garage to Yours: Trusted Rust Solutions
Every Great Solution Starts with a Real Problem
My name is Joe Dupont, and nearly ten years ago, I stood where many of our customers stand today: frustrated, anxious, and looking at a truck slowly being eaten away by rust. I relied on that truck for my business, and replacing it wasn’t an option. What the mechanics told me—*“There’s nothing you can do”—*just didn’t sit right.
At the time, I’d spent over 30 years building kitchens and bathrooms for hardworking families. I wasn’t an engineer or a chemist—just a small business owner with a problem and a determination to solve it. What I discovered would not only change the fate of that old truck but spark a movement that’s now protecting thousands of vehicles across the U.S.
🧪 From Backyard Research to a National Brand
I started by listening—first to my neighbors, many of whom had been spreading used motor oil under their trucks for years. Then, I dug into the science. I found that in Europe, rustproofing wasn’t a forgotten art—it was essential. They were using safe, effective, and environmentally conscious oils to battle rust long before it started.
That was the spark.
Encouraged by an old farmer’s tale and backed by growing knowledge, I began blending, testing, and re-blending formulas. I wasn’t trying to build a business—I was trying to save my truck. But word spread. First, friends. Then neighbors. Then customers. The results spoke for themselves.
Your car—an investment second only to your home—is rotting out from under you.
Where Farmers’ Wisdom Meets Modern Engineering
From Farm Fields to Cutting-Edge Chemistry: The NHOU Story
It all began on the farm. Observant farmers noticed something remarkable—wherever oil leaked onto their tractors, rust didn’t form. In a stroke of old-school ingenuity, they began applying used motor oil to the metal surfaces of their equipment. It worked. Not only did this simple solution protect against corrosion, it gave new purpose to what was once considered waste. Talk about recycling with results.
But there was a problem: no one made a product specifically for this purpose. The closest option available was a generic, lanolin-based formula originally developed in the mid-1900s. While lanolin—commonly used in cosmetics—offered some promise, it wasn’t engineered for the demanding conditions of automotive use. In testing, it simply didn’t meet our expectations.
That’s when we decided to do things differently.
Partnering with corrosion engineers and a team of chemists with over 40 years of combined experience in automotive chemical coatings, we embarked on an extensive journey of research and development. Our mission was clear: to create the most technologically advanced, environmentally friendly, and long-lasting rust protection solution on the market.
The result? NH Clear and NH Back-N-Black—two powerhouse undercoating products that reflect decades of expertise, rigorous testing, and a relentless pursuit of quality. Today, these innovative formulations are trusted by professionals and available in hundreds of automotive stores and garages across the country.
What started as a practical discovery in the fields has evolved into a nationwide standard in corrosion protection.
Where Farmers’ Wisdom Meets Modern Engineering
NHOU Today: The Guide for Rust-Weary Drivers
At NH Oil Undercoating®, we understand the toll rust takes—not just on vehicles, but on the peace of mind of those who drive them. We’re here as a guide, helping you protect what matters with products and services built on:
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Innovation: Constantly evolving formulas, including our newest addition—Mouse Out, a rustproofer that also deters rodents.
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Integrity: No gimmicks. No shortcuts. Just products that work.
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Empathy: Because we started exactly where you are now.
From One Truck in New Hampshire to Thousands Nationwide
We didn’t launch from a lab or corporate office—we launched from a garage with a problem to solve. Today, NHOU products are trusted by shops, dealerships, and DIYers all over the country. But our values haven’t changed. We still believe in putting people first, solving real problems, and making vehicle protection affordable, accessible, and effective.