ADVANCED RUST PROTECTION

NHOU^® PROTECTIVE COATINGS ARE THE FASTEST, LEAST EXPENSIVE WAY TO ADD SAFETY AND VALUE TO YOUR VEHICLE— SEALING OUT CORROSIVES AND ELIMINATING RUST

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PROFESSIONAL SERVICE

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Shop coatings, sprays & tools.

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FLEET SOLUTIONS

Protect Your Fleet

Protect More. Replace Less.

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Protect your ride. Extend its life—with NHOU® Innovation That Doesn't Rust

NHOU Essentials

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NHOU® Oil Undercoating-Double Defense: Rust Prevention Meets Rodent Repellent.

NHOU® Products, Rodent Defense Vehicle Protection

For those who loved Mouse Out on its own, you’ll be happy to know that it’s now part of our regular oils—meaning even more protection for your vehicle! With 92% effectiveness (tested in the lab, trusted in the field), it’s everything you loved about our oil products PLUS the added benefit of Mouse Out.

🔹 Same great product, now better.
🔹 More protection.
🔹 No change to the oil's effectiveness—just more power!

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NHOU V3 Formula Undercoating

Oil Undercoating, NHOU V3 Undercoating

AVAILABLE NOW: NHOU V3

The next evolution in rust protection is here—and it’s a game-changer.

NHOU V3 is a hybrid fusion of everything that works:

Deep-penetrating petroleum oil

Long-lasting wax-based durability

Natural, moisture-blocking lanolin

Now infused with Mouse Out for added rodent defense

Lab tested to be 92% effective!

This isn’t just a new formula—it’s a revolution born from years of testing in our own shop, on thousands of real vehicles, guided by real customer and applicator feedback.

Drip-free

Longer-lasting

Built for pros, trusted by customers

Available now at participating NHOU applicators

Coming to our online store by the end of July

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NH Oil Undercoating Touch-Up Cans -Your Rust Protection, Recharged

NHOU® Products, Oil Undercoating

Not available to California residents

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NHOU® Keep the Mouse Out Aersol-Spray Away Rodents: 92% Effective Protection!

NHOU® Products, Rodent Defense Vehicle Protection

Introducing NHOU® Keep the Mouse Out aerosol spray—a powerful, eco-friendly solution designed to safeguard your vehicle from rodent infestations and corrosion. With a 92% effectiveness rating in independent laboratory testing.

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SCHEDULE LOCAL SERVICE

OUR SYSTEM
Smart Protection, Engineered to Endure.

Keep Rust Out. Keep Value In. With NHOU® Advanced Protection

Preserve What Matters Most

Rust-free vehicles are safer to drive, easier to work on and maintain the highest resale value.

DISCOVER PRODUCTS

Expertly Applied by Certified Technicians

NHOU Authorized Applicators are trained one-on-one at our headquarters to ensure every vehicle receives the highest standard of care.

SCHEDULE LOCAL SERVICE

Gentle on the Planet, Tough on Rust

Formulated with the environment in mind, every NHOU formula is non-hazardous and unregulated.

BUY PRODUCTS

NHOU V3: Three Variants, Unrivaled Performance

Combining three variants—lanolin, wax, and oil—we’ve engineered a breakthrough in rust protection that combines the best performance characteristics of each. Now a single undercoating formula fuses the natural moisture-repellency of lanolin, the durability of wax, and the critical creeping of oil. NHOU V3 was engineered in-house, tested on thousands of vehicles, and shaped by real-world feedback from pros like you. This isn’t just another formula. This is the Rust Revolution

Learn More

NHOU® FLEET LIFE EXTENSION PROGRAM

EXTEND FLEET LIFE.
PROTECT THE BUDGET.

Towns are spending $150K–$250K+ on equipment that corrodes before it should. NHOU helps municipalities, DPWs, and public fleets put a real program around protecting those assets — products, free on-site training, procedures, and a repeatable maintenance schedule your crew can actually follow.

DPW FLEETS
MUNICIPALITIES

SCHOOL
TRANSPORT

HIGHWAY DEPTS
COMMERCIAL

TALK TO US ABOUT YOUR FLEET

EQUIPMENT PROVIDED

Full spray setup and application tools — we bring everything to your facility

PRINTED MATERIALS

Reference packets every attendee keeps and uses on the job immediately

REPEATABLE PROGRAM

e help you build a maintenance schedule your crew can own season after season

PROFESSIONAL TRAINERS

Factory-trained NHOU applicators lead every session — real-world expertise

LIVE DEMOS

Hands-on application on real fleet vehicles and equipment — not just slides

ALWAYS FREE

LUNCH INCLUDED

We feed your crew — it’s part of the deal

DISCOVER WHY

As a hands-on family business, we’re constantly improving—formulating, applying, training, and innovating to help people protect what they value most.

Done Right. Done by Pros-Hands-On Expertise You Can Trust

WATCH NOW

LEARN MORE

NHOU REVIEWS

Backed by Science. Proven by People

See what our customers are saying about their experience with NHOU products and services

      EXCELLENT  
   Based on 796 reviews 
    
 
 
 
   
 
 
      Posted on Google  
  
 
   Gary Stanhope 
 8 October 2026
 
 
 Trustindex verifies that the original source of the review is Google. Great waiting room. Great service and work is done well, and in the estimated timeframe.
  
 
     Posted on Google  
  
 
   Lilah Flynn 
 7 October 2026
 
 
 Trustindex verifies that the original source of the review is Google. Great job
  
 
     Posted on Google  
  
 
   Nick Skafidas 
 7 October 2026
 
 
 Trustindex verifies that the original source of the review is Google. Great place!
  
 
     Posted on Google  
  
 
   Nikayea Gadwah 
 6 October 2026
 
 
 Trustindex verifies that the original source of the review is Google. Staff is friendly, efficient and knowledgeable.
  
 
     Posted on Google  
  
 
   Raymond Cote 
 6 October 2026
 
 
 Trustindex verifies that the original source of the review is Google. Great penetration and adhesion. Only product I use.
  
 
     Posted on Google  
  
 
   Heather Geroux 
 28 September 2026
 
 
 Trustindex verifies that the original source of the review is Google. He put the undercoat all over my truck underneath, including the spare tire, hoses that are now deteriorating because of the chemicals,  handprints all over my blue truck with oil, and told me a lie and said that he did the descaling when we get underneath that he did not do the descaling. He acted like he did me a favor of saving me $300 which he tried charging me for descaling, which didn’t need to be done as I get the undercoat done every year. I was trying someone new now I wish I never had. He’s destroyed my truck!!!!
  
 
     Posted on Google  
  
 
   Dependable NH 
 25 September 2026
 
 
 Trustindex verifies that the original source of the review is Google. Staff is friendly & helpful and the experience was great. There is a comfortable living-room like waiting with complementary coffee or a conference room where you can get some work done while you wait. Service takes about 45-60 minutes and protects your vehicle's underside from our NE winters.
  
 
     Posted on Google  
  
 
   Steve Kiander 
 24 September 2026
 
 
 Trustindex verifies that the original source of the review is Google. Awesome job! Great product!
  
 
     Posted on Google  
  
 
   Ryan Waystack 
 24 September 2026
 
 
 Trustindex verifies that the original source of the review is Google. Nhou was very easy to schedule and has a great reputation. Quick service. Look forward to protecting my first truck
  
 
     Posted on Google  
  
 
   Joseph Switzer 
 22 September 2026
 
 
 Trustindex verifies that the original source of the review is Google. Quick service, helpful staff and always a job well done.
  
 
 
  
 
   Verified by Trustindex  Trustindex verified badge is the Universal Symbol of Trust. Only the greatest companies can get the verified badge who has a review score above 4.5, based on customer reviews over the past 12 months. Read more

From Rust to Results: The NHOU® Story

NHOU® Advanced Rust Protection 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.

Regular Hours

Monday – Thursday: 8am-5pm

Friday: 8am-12pm

Saturday – Sunday: Closed

(603) 491-9012

Seasonal Hours

(Sept-Dec)

Monday – Thursday: 8am-6pm

Friday: 8am-4pm

Saturday – Sunday: Closed

GET IN TOUCH

SCHEDULE
SERVICE.

Ready to protect your vehicle? Contact us to schedule your undercoating appointment or get answers to your questions.

CAREERS AT NHOU

WE'RE
HIRING.

Join the team behind the standard. We're looking for people who take the work as seriously as we do.

VIEW OPEN POSITIONS

ADVANCED RUST PROTECTION

PROFESSIONAL SERVICE

Protect My Vehicle

SHOP ONLINE

Shop NHOU Products

FLEET SOLUTIONS

Protect Your Fleet

START YOUR BUSINESS

Become an Applicator

NHOU Essentials

NHOU® Oil Undercoating-Double Defense: Rust Prevention Meets Rodent Repellent.

NHOU V3 Formula Undercoating

AVAILABLE NOW: NHOU V3

NH Oil Undercoating Touch-Up Cans -Your Rust Protection, Recharged

NHOU® Keep the Mouse Out Aersol-Spray Away Rodents: 92% Effective Protection!

OUR SYSTEM Smart Protection, Engineered to Endure.

Preserve What Matters Most

Expertly Applied by Certified Technicians

Gentle on the Planet, Tough on Rust

NHOU V3: Three Variants, Unrivaled Performance

EXTEND FLEET LIFE. PROTECT THE BUDGET.

EQUIPMENT PROVIDED

PRINTED MATERIALS

REPEATABLE PROGRAM

PROFESSIONAL TRAINERS

LIVE DEMOS

LUNCH INCLUDED

As a hands-on family business, we’re constantly improving—formulating, applying, training, and innovating to help people protect what they value most.

Backed by Science. Proven by People

From Rust to Results: The NHOU® Story

Regular Hours

Seasonal Hours

SCHEDULE SERVICE.

WE'RE HIRING.

OUR SYSTEM
Smart Protection, Engineered to Endure.

EXTEND FLEET LIFE.
PROTECT THE BUDGET.

SCHEDULE
SERVICE.

WE'RE
HIRING.