Rustproofing the Range Rover Classic

Rust is Kingsley’s Nemisis so when I met a chap called Ian of Rustbusters, I knew that I had found a kindred spirit. Ian is obsessed with the prevention and cure of rust and I knew that Kingsley should follow his well-proven system and purchase all of our rust proofing products from Rustbusters.

Underbody Cleaning

As a starting point, we clean the underbody of the car, removing any salts, rust and flaking paint from the underside of your vehicle.

Loose rust, dirt, salts or grease will act as an unstable layer beneath the Dinitrol potentially allowing it to fail so we use a concentrated caustic detergent in a specially constructed underbody steam cleaner that cleans and breaks down the grease leaving the surface perfectly clean, and ready to take a surface treatment.

Treating Surface Corrosion

Once the underside of the car has been cleaned, degreased and has fully dried, any surface rust is removed with an MBX Monti metal power brush which will give a similar steel surface profile and cleanliness to blast cleaning but without the loss of any good metal or the introduction of heat or acid.

Any surface corrosion is treated with Rustbuster FE-123 rust molecular rust converter, any holed corrosion has to be cut out to good metal and then butt-welded — Kingsley never plate or patch as this would allow underlying corrosion to fester and grow under the plate/​patch.

Coating the Underside in DINITROL 4941

We then coat the underside in heated DINITROL 4941 which is a superior self-healing underbody product that will not dry out or flake off in time like many lesser products. When applied hot to a clean, dry surface, it adheres to both painted surfaces and those coated with a layer of protection. Zinc, rubber, and plastics are completely unharmed by the product.


  • Black
  • OEM references
  • Robust, universal film
  • Self-healing
  • Good abrasion resistance
  • Good component protection

Technical properties:

Colour black
Type of film hard, waxy
Density at 23°C app. 1100 kg/m³
Viscosity at 23°C 800 mPas
Dry matter content 65% by weight
Flash point 36°C
Rec dry film thickness 300 − 500 μm
Drying time 6 − 12 hrs
Tough dry Low temperature adhesion -20°C
Removability Hydrocarbon solvents
Salt spray resistance, 300 μm 1500 hrs.

Epoxy-Mastic 121

For additional protection for chassis, suspension components (and any other treated steel), a coating of Rustbuster Epoxy-Mastic 121 will protect the steel in a completely impervious flexible iron hard barrier that will prevent the steel from future rust. This can either be left as a top coating or it can be over-coated with Dinitrol, waxes, sound deadeners, stone chip coatings or primers and topcoats.

The slow cure epoxy in Epoxy-Mastic 121 ensures that the coating is completely bonded to the steel at every square millimetre in an extremely tough but flexible barrier coating. Even if the system is breached by a sharp stone flying at bullet-like speed the stone chip will only corrode at that point, due to the primary bond it is not able to travel under the coating and cause delamination. At a later inspection the rust spot can be treated and with Rustbuster FE-123 rust converter and repaired with a touch up of Epoxy-Mastic.

Make an Enquiry

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