Frequently Asked Questions
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What is the difference between a Rust Converter, a Rust Inhibitor and a Rust Remover?
A 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.
A 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?
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.
The underbody wax will not set as such but it should skin over and stay soft underneath. The test is to put your thumb onto the surface of the wax and it should leave a thumb print but you should not have any wax on your thumb. The skinning process allows for expansion and contraction and when a stone breaks the surface skin it will migrate back across the gap.
To ensure maximum protection and adhesion a very thin coat of cavity wax can be applied prior to the underbody wax application - basically wet it to seal the surface and improve adhesion. If this coating is too thick it can make the cure process much longer. The solvent will evaporate over time.
If small stones or grit get into the surface of the wax it will not affect the anti-corrosion properties of the wax.
The technical data sheets offer advice on application and thickness
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?
If the polyurethane is fully cured it will be resistant against brominated water. To bond between glass and stainless steel the following steps must be adhered to:
Preparing the stainless steel -
- Clean off the bonding area with DINAC-1L cleaning agent.
- Sand off the bonding area.
- Remove and clean the sanding dust with DINAC-1L.
- Apply the activator PUR520 (Drying time ten minutes).
- Apply the black primer PUR550 (Drying time ten minutes).
- Apply the adhesive PUR501 FC-HM
Preparation of the glass -
- The glass must have a ceramic layer to protect the primer and adhesive against UV light.
- Clean off the bonding area with DINAC-1L cleaning agent
- Apply the activator PUR520 (Drying time ten minutes).
- Apply the black primer PUR530 (Drying time ten minutes)
What is RUST?
Rust is a general term for a series of iron oxides, usually red oxides, formed by the reaction of iron and oxygen in the presence of water or air moisture. Rusting is the common term for corrosion of iron and its alloys, such as steel. Given sufficient time, oxygen, and water, any iron mass eventually converts entirely to rust and disintegrates. The final red product: Fe2O3.H2O
What should I do about existing rust?
Wire brush the worst and then apply a rust convertor like DINITROL RC900 aerosol or DINITROL RC800 sprayable/paintable. Allow to dry overnight and it will have turned the rust into a black stable organic compound ready for waxing.
- DINITROL RC900 penetrates rust 7-10 times deeper than standard rust convertors.
- Product is free of lead, zinc and chromium.
- Product is over-paintable.
- As the product dries it forms an impermeable barrier to oxygen and moisture
- DINITROL RC900 forms a dry and strong adhesive film which is suitable as a base for paintwork and other rust protection products.
What tools and sealants would you recommend for the removal and refitting of the rear screen of a 56 plate VW transporter?
We would suggest you remove the rear window with a fibre cord. You will need a T handle with a hole to get the cord through the urethane and a pair of handles to hold both ends of the cord. A Dinitrol PUR500 fitting kit will be needed to replace the glass. DINITROL 500 is an adhesive for bonding windscreens.
The PUR500 kit contains: 1 x 310ml Polyurethane, glass & body primer 30ml, glass cleaner/activator 30ml, 1 x pre-cut nozzles, 2 x primer applicators, fitting instructions and a pair of Nitrile gloves.
Will Dinitrol ML3125 damage rubber and plastic under the vehicle bushes and flexible pipes etc?
No it will not damage these parts but we would recommend you wipe any overspray off to stop the solvent drying out any rubber parts.
What do you recommend for cleaning grease and oil off metal parts?
Dinitrol Autocleaner efficiently cleans and dissolves fats, waxes, engine and diesel oils. Dinitrol Autocleaner can be used on most metal parts. It can also be used for cleaning equipment and removal of overspray.
If water based waxes have been used them simply wash off with warm water.
What is ML3125 (Dinitrol rust preventative fluid) used for?
This product can be sprayed inside cavities, doors and sills but we also recommend applying a very thin coat onto the chassis prior to applying the underbody wax.
ML3125 is a rust preventive fluid with good film building properties for open surfaces as well as for cavities i.e. chassis box sections. It is capable of good penetration into crevices and joints, preventing further corrosion even on damp or dirty surfaces.
Available in 500ml aerosol spray can and 1 litre can (with Schutz style screw cap).
Do any of Dinitrol rust treatment products help with sound deadening?
DINITROL 445 is a black, permanently elastic rust prevention product which also offers additional stone-chip protection.
Dinitrol 445 has a sound deadening effect and can be overpainted. It is free of aggressive solvents like chlorinated hydrocarbons and is compatible with PVC coatings. DINITROL 445 is used for repair work in visible areas where bituminous products are not desirable such as door sills, spoilers, rear skirts, engine housings and vehicle bonnets.
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?
No, the recommended way is to apply DINITROL ML3125 first then DINITROL 4941/4942 underbody wax. For extra rust protection against stone chip and abrasion, particularly if you drive "off-road", then spray DINITROL 447 under the wheel arches only.
DINITROL DIY Rust Proofing Kits contain all you need to protect your vehicle from corrosion. These Stone Chip Kits are designed for off-road and high mileage vehicles.
Will ML3125 stop rust?
Yes, as it contains rust inhibitors and will form a waxy, water repellent coating.
This product offers super penetrating rust prevention and stops existing rust.
Do you have a clear underbody wax?
Yes, we stock Dinitrol High Performance Underbody Wax 500ml aerosol. This product is a transparent, low viscous underbody rust prevention wax for application on all types of cars and commercial vehicles as well as for machines and types of equipment where corrosion is a problem.
Dinitrol high performance underbody wax is:
water repellent and high penetrating.
offers self-healing properties.
it is resistant to temperatures up to 180°C thus making this product also suitable for applications on engine compartments.
odourless after drying even when exposed to high temperatures.
Which is the best clear wax product for the underbody?
DINITROL 4010 is a clear high temperature wax - up to 200 degrees centigrade - which dries to a hard finish.
This product can be sprayed on the entire underneath of the vehicle, taking care to avoid electrical components and pulleys where the belts run.
What are the best rust protection products for under the wheel arches?
The best treatment for rust protection on wheel arches is Dinitrol 447 and Dinitrol 445.
Dinitrol 447 is a rubber-synthetic, resin based, quick drying underseal. This product contains zinc which improves rust protection properties thus delaying the onset of rust. It is of particular value when applied to places where the coating has been damaged such as a vehicles wheel arches.
Dinitrol 447 does not contain aggressive solvents such as chlorinated hydrocarbons, esters, ketones or aromatics and is therefore the ideal treatment on car body works.
Dinitrol 447 stays permanently elastic and protects against stone and salt damage.
Dinitrol 445 is a synthetic resin/plastic based anti-drone or sound deadening product. It is solvent based and ideal for wheel arches.
Why should I protect my vehicle?
Crash tests have proved that the risk for severe or fatal injuries is by far higher, when travelling in a corroded vehicle.
What is the difference between Waxoyl and DINITROL?
DINITROL is a wax which dries to leave a cured soft outer layer where as Waxoyl is a mixture of wax and oil which never cures and continues to be liquid even after many months.
What happens when a stone chips the wax?
The wax stays soft underneath the surface thus allowing the wax to migrate back to cover the damage. This ability also allows for expansion and contraction of steel without cracking.
How do your products compare with Waxoyl 120-4?
DINITROL 3125 compares very favourably with Waxoyl 120-4. It has high creep getting into all the nooks and crannies. It also contains a rust inhibitor to neutralize any surface rust it comes in contact with. The big difference is Waxoyl is oil and wax mixed so it never cures and on hot days continues to drip out of any holes left and you will get an odour from the oil.
DINITROL is wax and solvent so when the solvent evaporates it leaves only wax which expands and contracts with temperature changes and no smell as we use aromatic solvents.
When DINITROL cures it leaves a skin and stays soft underneath allowing it to self heal in all temperatures.
Does Dinitrol make a high temperature wax?
Yes, DINITROL 4010 is a high temperature, clear wax for use around the engine compartment and is resistant to temperatures up to 2000 .
DINITROL 4010 is available in aerosol cans or Schutz style tins for use with an airline or compressor.
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?
DIN3654 (rust prevention cavity wax) was designed specifically with new metal in mind. It is used at factory level on new production lines and is ideal for cavities on new vehicles. DIN4941 is suitable for both new and older vehicles as an underbody rust protection wax.
How do anti-corrosion waxes protect?
Waxes work by creating a barrier to keep out both air and moisture.
What is VCI?
VCI means Volatile Corrosion Inhibitor, in other words a volatile prevention of corrosion or anticorrosive. The term VCI inhibitor is understood to mean the working of special volatile linkages into differing carrier materials. Inherent inhibitor vapour pressure causes them to evaporate out of the carrier material and to diffuse within the packaging. They are absorbed onto metal surfaces in the form of an invisible film. Once there, they provide active protection against the breakdown of the passive layer. MORE DETAIL