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Convert rusted surfaces and protect with Neutrarust 661®

Trusted by professionals around the world for over 40 years, Neutrarust 661® is the British-made, non-toxic, water-based rust converter that delivers proven, industry-grade performance. Convert rust corrosion, stop it in its tracks, and protect equipment metal surfaces with lasting results.

  • Fast-acting rust converter
  • Converts rust into a durable sealed ready-to-paint surface
  • Water-based, non-hazardous and easy to apply
  • Cost-effective corrosion protection with minimal preparation
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  • Approved by the British Ministry of Defence and NATO, it’s the professional’s choice for effective corrosion control.

Neutrarust Customers

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Professional rust
treatment products

Convert

Neutralise and stabilise rust with Neutrarust 661®. Creates a hard, paint-ready coating for long-lasting protection.

Rust converters

Protect

Seal and protect metal with durable wax coatings. Repels moisture and prevents future corrosion.

Rust Preventative wax

Remove

Dissolve rust quickly with our liquid and gel removers. Ideal for heavy corrosion and surface restoration.

Rust Removers

Neutrarust 661® –
The complete rust treatment solution

Rust can quickly destroy ferrous metal if left untreated. Neutrarust 661® stops the corrosion process and converts rust into a stable, paint-ready surface that’s built to last. The formulation produces a durable, water-insoluble coating while remaining water-based, mineral acid-free and safe to use.


Fast-acting and easy to apply, Neutrarust 661® has been tested to MOD and NATO standards and proven in harsh marine and industrial environments. By converting rust into a strong, resilient layer, it creates the perfect foundation for long-term protection and reliable performance.


When you need a rust converter you can trust, Neutrarust 661® does the job — simply and effectively.

Converts and stabilises rust

Chemically neutralises corrosion and forms a durable, paint-ready surface.

Creates a hard, water-resistant coating

Produces a long-lasting hydrophobic film that protects against moisture.

Water-based and non-hazardous

Mineral acid-free, easy to apply and safe to use in most environments.

Works with minimal preparation

Simple, direct-to-rust application with strong adhesion to most paint systems.

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Where Neutrarust 661® is used

Neutrarust products are relied on across a wide range of industries, from marine and offshore structures to automotive restoration and heavy engineering. Below are some of the key applications where Neutrarust delivers proven results.

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Proven results from Customers

  • Verified purchase

Magic in a bottle – used on dumper to treat rust, fantastic product!

Neutrarust 661 Rust Converter & Primer Treatment – 1 Litre
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Excellent product, exceeded all my expectations

Excellent product!

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Results are visible within minutes

I had been looking for a good rust treatment for a while and had tried a few over the years with differing levels of success. I wanted something to use on a motorhome which had surface rust on a few places, mainly where steel meets aluminium along the chassis and the brake units. Coming from an ex-military background and as this is MOD and NATO approved I thought I would give it a go. Got to say, it’s easy to apply straight out of the bottle, and the results are visible within minutes.

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This product is one of the best you can use to prevent further rust development

I have seen this product for many years in an offshore/marine environment and it works! You get what you pay for applies here.

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Good quality product

Used this product on a narrowboat and it does exactly what it is supposed to do. Easy to use and perfect results.

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Kills rust

An excellent product, it does a great job at killing the rust and makes a good base for paint.

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Rust converter

This rust converter is really good you get plenty for your money and it goes a long way

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Great product at the right price!

Excellent product!

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Great product

This works really well. I can’t believe how effective it is against rust. Quick to dry and really easy to apply. I used this to refurbish old cast iron gutters.

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Does what it says

This is quite an amazing product since it does not destroy rust – and therefore rusty metal – but arrests the process and converts the rusty metal to a metallic substance, providing a good base to overpaint with primer or topcoat, which can be applied within a short time…

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Rust Converter/Primer

What I wanted at a fair price. Recommended Seller

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It does what it says on the….. plastic container

I bought this to use in the refurbishment of a 1958 Massey Ferguson tractor and thought a 5l tub might just last, well I did it all with less than 1 litre. It goes on like very thin emulsion paint and looks like milk when first applied, but then turns a shade of blue before finally returning to its original metallic shade but with a slight appearance of being varnished…

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A little goes a long way

We used this on our shipping container to take the rust from the door surrounds, it worked instantly and turned the rust areas into a smooth black workable surface, ready for painting. Really good product.

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Does what it says on the tin

Excellent result. Make sure you clean and prepare the surface before treatment.

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Excellent

I’ve been using this on my old van, and it seems to do what it claims. It seems expensive but a little goes a long way. I have developed confidence in it in comparison to other anti-rust treatments; so much so that I’m going to stay with it and buy more. In other words, “highly recommended.

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Excellent

So easy to apply, just wire brush off excess surface rust and apply really goes a long way, dries quickly and turns black, I have coated mine after a day with some black chassis paint.
Very pleased, did all 4 corners and still have half a container left.
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Brilliant for rust prevention maintenance

After a heavy salting on the roads this winter, my vehicle was rusty underneath.
I jacked it up, took off the wheels, power washed, then a good coat of Neutrarust 661 on everything I could see including exhaust. It turned the rusty surfaces a nice black colour and treated the surfaces well,
A great tidy-up and rust-prevention measure for MOT inspection

  • Verified purchase

Miracle worker

I have just done my motorhome with this product its 18 years old and had a lot of rust i tried to spray it on but gave up after 1 minute I then used a brush along with gloves and goggles 24hrs later it looked like a new van it was very hard work lying on my back and getting into all the grooves but well worth it, I finished it off with lanoguard which I did use the spray provided and it was a doddle.

  • Verified purchase

Best marine anti-rust treatment for steel and iron

I believe that this product was originally developed for the Royal Navy to use on their nuclear submarines. It is excellent too for less exacting jobs such as treating corroded steel, wrought and cast iron objects exposed to the elements.

Questions About NeutraRust 661 ® Products?

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