About Us
What We Couldn’t Buy, We Built
From a family garage in New Hampshire to rust protection trusted across the country.
NHOU® started with one rusting truck and a founder who wouldn’t accept “there’s nothing you can do.” Today we make, test and apply rust protection for vehicles, fleets and equipment, and we still run it as a hands-on family business.
25,000+ vehicles coated
Hands-on experience applying our own products, year after year.
Engineered with a lab
Every formula is developed with a laboratory, then tested in our own lab in New Hampshire.
Proven in our own shop
We treat thousands of vehicles a year, so we see real-world results firsthand.
Family-owned
We work the office, the shop floor, dealer training and product development ourselves.
Every Great Solution Starts with a Real Problem
“My name is Joe Dupont. Years ago, I stood where many of our customers stand today: frustrated, and looking at a truck I relied on for my business slowly being eaten away by rust. Replacing it wasn’t an option. When the mechanics told me there was nothing I could do, it just didn’t sit right.
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 the determination to solve it.
I started by listening to neighbors who had spread used motor oil under their trucks for years. Then I dug into the science and learned that in Europe, oil-based rustproofing was standard practice. I began blending, testing and re-blending. I wasn’t trying to build a business; I was trying to save my truck. But word spread: first friends, then neighbors, then customers.”
Joe Dupont, Founder
From the Farm to the Lab
It started on the farm. Farmers noticed that wherever oil leaked onto their tractors, rust didn’t form, so they began applying used motor oil to their equipment. It worked, but nobody made a product for the job. The closest option was a generic lanolin-based formula from the mid-1900s that wasn’t built for automotive use, and in our testing it didn’t meet our expectations.
So we did it differently. We partnered with corrosion engineers and chemists with over 40 years of combined experience in automotive chemical coatings. The result was NH Clear and NH Back-N-Black, today’s NHOU® Original Oil Undercoating in Clear and Black, now sold through automotive stores and garages across the country.
Built to Defend. Engineered to Last.
Engineered with a lab
Founder Joe Dupont works with a laboratory to develop every NHOU® formula.
Tested in New Hampshire
Each formula is tested in our in-house lab in New Hampshire.
Proven and improved
It goes to work on the thousands of vehicles we treat in our own shop every year, and we keep refining it as the science moves forward.
Our Values
We’re here as a guide, helping you protect what matters with products and service built on these values.
Innovation
Constantly evolving formulas, from our Original Oil to V3, our oil, wax and lanolin hybrid.
Integrity
No gimmicks. No shortcuts. Just products that work, and honest answers about what each one does.
Empathy
We started exactly where many of our customers are now, so we know what rust costs you.
Hands-on
As a family business, we’re in the office, on the shop floor, training dealers and building new products.
From One Truck to Thousands Nationwide
We didn’t launch from a corporate office. We launched from a garage with a problem to solve. Today, NHOU® products are used by shops, dealerships, fleets and do-it-yourselfers across the U.S., with sister sites serving Canada, Europe and Germany.
Our values haven’t changed. We still put people first, solve real problems and make vehicle protection affordable, accessible and effective.
How Can We Help?
Protect your vehicle
Find the right product for your vehicle’s rust level, then buy online or book a local applicator.
Run a fleet
Extend the life of the vehicles your business depends on with a fleet rustproofing program.
Become a dealer or applicator
Offer NHOU® products and services in your shop, with training and support from our team.
Need a Consultation?
It’s not just an undercoating. It’s a commitment. Tell us about your vehicle or fleet and we’ll point you in the right direction.