Frequently Asked Questions

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What is the difference between a Rust Converter, a Rust Inhibitor and a Rust Remover?

rust converter is a water-based primer, which contains two active ingredients: Tannic acid and an organic polymer. When applied to a rusty surface there is a chemical reaction, which converts rust into a stable, black protective polymeric coating. This coating serves as an excellent primer for both oil and epoxy based paints, thereby concealing the existence of any rust and preventing further rust.

rust inhibitor is an antioxidant that inhibits the formation of rust.

Rust Remover - there is no chemical process involved (versus a rust converter which involves a chemical process to destabilise rust). Instead a rust remover is applied to the affected area to help in the process to banish rust from the object being treated. Rust removal products contain oxalic acid as the main ingredient. Sanding away as much of the rust as possible is advisable before the rust remover is applied. 

Dinitrol 4941 applied to the underside of my car and now in the process of restoring the underside again. This time round I want to paint the underside the same colour as the car. Can I overpaint on top of the Dinitrol 4941?

The only products that can be over painted are the stone chip DINITROL 445 and DINITROL 447. The DINITROL 4941 underbody wax rust prevention cannot be overpainted, so it will need to be stripped back. 

What procedure should be followed when applying DINITROL rust prevention waxes?

The step-by-step guidance for wax application process is as follows:

1. Steam clean vehicle and allow to dry 

Mask up any areas that you do not want to spray, such as exhaust, brakes, electrics or radiator.

>Wear protective clothing.

>Place plastic floor covering under the vehicle as the cavity wax may drip.

2. Treat any rust present with DINRC800 or DINRC900 rust converter

Remove any flaking rust and apply the rust convertor to the remaining rust making sure the edges are coated to ensure a good seal.

3A. Spray cavity wax into all box sections and doors using an injection pipe or extension nozzle 

Injection pipes or lances are for cavity wax only, not for applying underbody waxes.

3B.Also apply a thin coat to the underside of the vehicle.

 Spraying a thin coat of cavity wax prior to applying the underbody wax softens up any existing coating that may be present and helps with the adhesion of the underbody or stone chip wax.

Cavity wax also contains rust inhibitors whilst the underbody wax combats road salt and abrasion

4. Apply the underbody wax over the thin coat of cavity wax, this can be done while still wet.

In some circumstances it may be necessary to warm the underbody wax prior to spraying as it is much thicker than the cavity wax.  

To obtain the optimum protection a typical thickness of 700 microns wet to dry to around 500 microns should be applied. Depth gauge DINE17127

 As the wax is solvent based you must ensure air flow around the vehicle to allow the solvents to evaporate. The thicker the application the longer it takes to dry.

This should be touch dry in 6-12 hours and if you press your thumb onto the wax it should leave a print in the wax but not come off onto your thumb.

Underbody wax shows self-healing properties and skins over when dry but remains soft underneath allowing it re-seal.

It adheres to both painted surfaces and those with a layer of PVC or similar material, it will not harm rubber or plastics.

5. If using stone chip then step 3b still applies prior to application. Remember you cannot apply stone chip over underbody nor the other way round.

We recommend stone chip in areas of high abrasion such as wheel arches and off road vehicles. For normal wear and tear use underbody wax. Stone chip is hard wearing but does not re-seal.

6 To clean excess or overspray and to clean equipment use Dinitrol auto cleaner 7225 or other Benzene based spirit.

7. Retreat the cavity every 5 years and inspect the underbody annually and touch in where necessary.

8. For engine compartment you can use DIN4010 clear wax. This will withstand temperatures up to 200c and dries hard.

What do you recommend for cleaning a chassis, prior to a Dinitrol application?

A good clean down with a pressure washer, using a traffic film remover and then leave to dry before application.

How do you treat a rust on a Citroen C-Zero battery stay?

Treat with Dinitrol DIN4941 - This is a thixotropic external underbody rust prevention fluid, which provides long term resistance against corrosion and abrasion, even under severe conditions. It provides a tough elastic waxy protective coating. The wax film is resistant to repair and oven paint temperatures. 

How do you treat rust spots to the side steps of a Ford Ranger?

First step is to treat all rust spots on the side steps by first applying Dinitrol rust converter RC900. After removing all traces of rust, apply Dinitrol DIN77b wax before re-fixing side steps. Dinitrol 77b is light brown and dries to a hard, thick film and is ideal for use on areas of high mechanical abrasion.

Does Dinitrol underbody wax set? I am concerned that when the car is being driven after the wax has been applied, it will pick up stones and grit sticking to the soft wax and as a result offer little protection.

Can I use Dinitrol polyurethane to bond glass to stainless steel that will be submerged in brominated water (similar to chlorine water and salt water )? Will I need a water and chemical resistant adhesive?

What is RUST?

What should I do about existing rust?

What tools and sealants would you recommend for the removal and refitting of the rear screen of a 56 plate VW transporter?

Will Dinitrol ML3125 damage rubber and plastic under the vehicle bushes and flexible pipes etc?

What do you recommend for cleaning grease and oil off metal parts?

What is ML3125 (Dinitrol rust preventative fluid) used for?

Do any of Dinitrol rust treatment products help with sound deadening?

What can I use to re-fit the side molding and rear spoiler to my car?

Can I spray underbody wax over the top of stone chip rust proofing products or vice-versa?

Will ML3125 stop rust?

Do you have a clear underbody wax?

Which is the best clear wax product for the underbody?

What are the best rust protection products for under the wheel arches?

Why should I protect my vehicle?

What is the difference between Waxoyl and DINITROL?

What happens when a stone chips the wax?

How do your products compare with Waxoyl 120-4?

Does Dinitrol make a high temperature wax?

I have a new vehicle arriving soon and want to protect it against corrosion before I take it out on the road. Are any of the Dinitrol products suitable or are they just for older cars with some rust?

How do anti-corrosion waxes protect?

Waxes work by creating a barrier to keep out both air and moisture.

What is VCI?