JLM Lubricants

JLM Cavity Wax


 / 400ml

  • Anti-corrosion wax coating for hollow bodyworks parts
  • Super penetrating to conserve smallest cavities
  • Long term protection for tools, sheet metal and machinery
  • Water repellent, non-aggressive to plastics, paint and rubbers
  • Rust prevention from road salt

JLM Lubricants’ Cavity Wax is a modern, powerful but convenient corrosion preventative, designed primarily for hidden vehicle bodywork box-sections. Its 500ML capacity ensures optimum value for all users, including garages, vehicle restorers, body shops and DIY enthusiasts.

Product information

JLM Lubricants’ Cavity Wax offers inside protection against corrosion, which starts from within a panel but becomes obvious only when it has worked its way through to the other side. By then, the damage is likely to be extensive.

JLM Lubricants’ Cavity Wax is ideal to safeguard inner sill cavities, separate chassis box sections and even behind outer body panel skins. Its handy aerosol can format avoids the need for dedicated and often messy compressed-air powered applicators, making it perfect for occasional use, or when a fast and convenient localised application is preferred. The brown wax is thin enough to creep into tight seams, while displacing water as it probes deeper into the panel. Once settled, it forms a tough, flexible skin that protects the steel against future water intrusion, including moisture contaminated by highly corrosive road salt. It can be used to either top-up the manufacturer’s factory rustproofing, or provide superior anti-corrosion protection for a coveted vehicle.

Formulated to meet the Finnish SFS 4086 corrosion protection standard, JLM Lubricants’ Cavity Wax even provides optimum protection to vehicles enduring the harshest weather conditions of Northern Scandinavia. Yet, it does not harm paint, or plastic/rubber trim.


JLM Lubricants chose the generously filled aerosol format for ease of use. As it is intended to be applied at room temperature, pre-warming is unnecessary. Shake the can well for at least two minutes before application. If the aerosol was used earlier, ensure that the nozzle is clear from previously-applied wax. Ensure that the treated surfaces are clean and dry for maximum protection. Any pre-existing rust should be treated with a suitable converter and any welding work must be completed before application.

Despite the nozzle’s wide and even spray pattern, an effective mist is also created for optimum coverage. Therefore, JLM Lubricants recommends that the user wears gloves, a breathing mask and suitable eye protection and works in a well-ventilated area. In difficult to reach parts, the supplied extension probe (60cm) provides superior access. Do not apply cavity wax to parts that can become very hot, such as the exhaust, engine, or the braking system. Once finished, allow any mist to dissipate. Surplus wax residues can be cleaned afterwards with a suitable aromatic solvent, such as white spirit.

Favicon JLM Lubricants grey

JLM Lubricants

Great addition

"This is a great addition to the products in my workshop. We continuously see fantastic results in the recovery of emissions and engine performance, among other things."

- Paul Finn

JLM Lubricants


"I was very skeptical, but after using the product and starting my car, I couldn't believe my eyes ... the yellow light in my car was no longer on!"

- Kevin Kalo

JLM Fixing cars

Surprising­ly good

"I never thought that JLM would surprise me so much. It gets better and better every time. I will continue to use these products. The fantastic results speak for themselves. Keep up the great work."

- Andrew Watts


These are the most common questions we get.

Do any of the JLM additives help the performance of the high pressure diesel fuel pump?

J02330 Rapid is perfect for pump and injectors!

Is it OK to use the JLM Extreme Clean and the DPF Cleaner together?

No, this will not have a positive effect. In fact it may cause an adverse effect. And also the risk of overdosing! Never combine fuel additives


Will JLM Bluboost dissolve existing crystal infestation or is it more like a preventative product?

JLM’s Bluboost additive cleans and prevents crystal formation in the AdBlue® dosing system. It also conditions the AdBlue® fluid for a longer time to ensure proper working of the AdBlue® and SCR system. This helps prevent performance loss and the often-subsequent expensive repairs. It also reduces foaming at low temperatures

Is the JLM Engine Oil Flush safe for use with wet belt engines?

Our JLM OIL FLUSH is safe to use with ‘wet belts’ (TBIO). This is mainly because we use non solvent and premium pack of oil cleaning additives.


Does the Petrol Emissions Reduction Treatment also clean the catalytic convertor?

The catalytic converter is not a filter, it functions by converting harmful emission gases into less harmful gases. The filter can become contaminated if for example there has been an oil leak, and when this happens the filter needs to be replaced. There is no additive or chemical that will remove physical contamination from a catalytic.

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