Krown Rust Proofing (also called Krown Rust Control) is a popular oil-based rust inhibitor and protective treatment for vehicles, primarily used in regions with harsh winters and heavy road salt, such as Canada and parts of the northern U.S.

What It Is:

Krown is a petroleum-based product containing rust inhibitors but no solvents. It is:Environmentally safe,Non-toxic,Non-flammable,Non-corrosive,Non-reactive.Can be applied in any weather.

Expertise in rust protection

It was developed in Canada in the 1980s specifically to combat underbody corrosion from winter road salt. The company has been providing this service since 1986 and claims over 300,000 drivers use it annually.

How It Works:

Krown is a thin,creeping oil that:
Displaces moisture (including water and salt) Bonds to metal surfaces.
Penetrates deep into seams, joints, frame rails, door panels, fenders, electrical connections, and other hidden rust-prone areas
Creates a self-healing, protective barrier that remains active

The oil acts as a carrier for the rust-inhibiting additives. It is designed to "creep" into tight spaces where traditional undercoatings can't reach, and it can even help slow existing surface rust. Unlike hard-drying coatings, it stays somewhat pliable and is considered a maintenance product rather than a permanent one-time coating.

Application Process:

Professional Krown dealers apply it using specialized wands and nozzles. Technicians often drill small access holes in doors and body panels to spray inside hollow sections (the holes are then plugged). The treatment covers:

- The entire undercarriage

- Inside body panels

- Frame

- Other vulnerable areas

It is recommended annually (or every 12–18 months) because the thin oil can wash off in high-exposure areas over time, though the company says a microscopic protective layer remains. Pricing is usually flat-rate and affordable compared to major repairs.

Summary:

- Excellent penetration into hard-to-reach areas

- Effective at preventing or slowing rust in salt-heavy environments

- Self-healing formula that continues to repel moisture

- Can be applied to new or used vehicles (including hybrids/EVs)

- Many long-term users report significantly less rust after years of use