NHOU® Solutions for Heavy Rust

Heavy Rust Protection

Stop the rust you can see and protect what’s left.

For older or high-mileage vehicles with flaking, scaly or pitted metal. Our two-step plan converts existing rust, then seals the underbody with NHOU® Original Oil Undercoating in Black.

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Signs of Heavy Rust

Look underneath at the frame, wheel wells and lines. If most of these sound familiar, you’re in the right place.

Flaking or scaly rustRust lifts off the frame or underbody in flakes or layers.
Pitting and rough metalThe surface is bubbled, pitted or rough to the touch.
Rust on lines and hardwareBrake lines, fuel lines, suspension parts or exhaust hangers show rust.
Years of salt exposureUsually older or high-mileage vehicles driven through many winters.
Safety first: if metal is rotted through or structural parts feel soft, have a mechanic inspect the vehicle before treating it. Undercoating protects metal; it doesn’t repair it.
The NHOU® heavy rust plan

Two Steps: Convert, Then Protect

Treat the rust that’s already there, then seal the underbody so it can’t come back as fast.

Step 1: Convert

NHOU® Rustoration® Rust Converter & Prep

Transforms rust instead of covering it.

  • Brush off loose scale, then apply to rusted areas
  • Converts rust into a stable zinc-phosphate layer
  • Made to work with NHOU® Oil Undercoating
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Step 2: Protect

NHOU® Original Oil Undercoating, Black

Creeps, migrates and prevents future rust.

  • Penetrates rust to the base metal and displaces moisture
  • Reaches seams, welds and cavities other coatings miss
  • Black finish gives the underbody a clean look; also available in Clear
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Our flagship product

Why NHOU® Oil Undercoating Works on Heavy Rust

Paint and rubberized coatings seal rust in, where it keeps eating the metal. NHOU® does the opposite: it penetrates the rust, displaces moisture and blocks oxygen so corrosion slows down at the source.

  • Highly refined mineral oil with green corrosion inhibitors
  • Bonds to clean metal in a thin, resilient film
  • Stands up to harsh road brines and salt
  • Trusted by tens of thousands of vehicle owners worldwide

Smart Protection, Engineered to Endure.

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How Do You Want It Applied?

Book a local NHOU® Authorized Applicator, or do it yourself with our DIY products.

Have It Professionally Applied

An NHOU® Authorized Applicator has the lift, equipment and training to reach every seam and cavity.

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Do It Yourself

Get pro-level results at home with a DIY Kit, or keep your protection topped up with Touch-Up Cans.

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Not heavy rust?

Find the Right Fit for Your Vehicle

New Vehicle

No rust yet. Lock in protection with BOSS Wax® & Oil, backed by a lifetime, transferable warranty.

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Light Rust

Early surface rust, metal still solid. Stop it from spreading with BOSS Wax® Hybrid.

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Not Sure?

Compare every NHOU® product and pick by rust level.

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Your Vehicle Deserves It

A professional team, the right equipment and proper training lead to better results on heavily rusted vehicles.

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