The best Anti-rust paints, compared.
Top pick: Hammerite smooth black 750 ml – Deepest review sample on the gloss black 750 ml colour coat. Two other tins share 94, so the badge is not repeated. Best value: Hammerite Kurust 90 ml – Lowest price for a reviewed spot converter, at about £7.20, and not the highest score. Updated October 2026.
Anti-rust paint is a coating for ferrous iron and steel that already shows rust. Shoppers use it on steel gates, railings and garden metal, or on a small spot before a topcoat. You tell a suitable tin by the metal it names, how much loose rust is left, the finish, and whether the brush cleans in solvent or water. The metal check comes first. A direct-to-rust colour coat is for rusted or bare ferrous metal. Bare zinc, aluminium and galvanised steel need a special primer, not the same first coat. Loose flakes and grease still come off. Direct to rust does not mean painting over scale. Sound old paint can take a test patch. Bare or rusty metal usually wants two coats. Those checks are in the [anti-rust paint buying guide](/hub/paints-and-varnishes/anti-rust-paint/sub/anti-rust-paint-buying-guide). Smooth gloss hides stains. A hammered pattern can hide pits if the texture forms. Pale colours need extra coats. Solvent enamel needs a through-draught. A water-based converter is not the finished colour. Nothing here is for permanent immersion, food contact or a stove. This category was not lab-tested.
Anti-rust paint is a coating for ferrous iron and steel that already shows rust. Shoppers use it on steel gates, railings and garden metal, or on a small spot before a topcoat.
28 products checked · 56 hrs invested · +18,600 readers
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Personal buying guide
Question 1 of 2
What are you coating?
Hammerite smooth black 750 ml, model 5158235, is listed at £20.43 on amazon.co.uk with 4.7 from 7,075 reviews, and the bullets call it a primer, undercoat and topcoat. The title says 750 ml, the size field says 1 L, and the volume field stays at 750 ml, so treat the tin as 750 ml until you open it. UK reviews praise a smooth gloss on prepared iron gates and railings, and one reviewer used a 750 ml fill for two coats on a garage door and a wooden frame. The same reviews call the enamel very thick: it dries on the brush in warm weather, one reviewer says keep the job under about 20°C, and overloaded drips set in seconds. Bare metal can need a thin coat plus two more, so one tin goes quickly, and one buyer says a listed brush was missing. Hammerite’s UK figure is about 5 m² per litre, against a listing coverage of 12 m² per litre and a dry-time field of 48 hours. It is the top pick here for gloss black on outdoor ferrous steel, not for a water-based cleanup or a 90 ml chip.
Pros
Cons
Best for: Gloss black on outdoor ferrous gates and railings when you want the largest review sample in this comparison.
Less suitable: A hammered look, white or silver, water-based brush cleaning, or a small chip you will overcoat.
Specifications
Common questions
Does Hammerite 5158235 need a primer?
The bullets say it performs as a primer, undercoat and topcoat. A UK review of bare railings still used a thin first coat plus two more. The listing question about primer is unanswered.
Is the 5158235 tin 750 ml or 1 litre?
The title says 750 ml. The size field says 1 L and the unit count is 1000 ml, while item volume is 750 ml. Reviews describe a 750 ml tin with 33% extra free.
Does this tin include a brush?
The included-components field says brush. One UK review says a brush was advertised and was not in the parcel.
Hammerite hammered black 250 ml, model 5084792, is £10.49 with 4.7 from 4,738 reviews, and the finish type is textured for exterior metal. Reviewers say one 250 ml tin covered front railings, a garden gate or a bench after loose rust was brushed off, and they like the hammered black on gates and plant supports because it is not a flat plain black. One coat is often described as enough on light rust, while a very rusty shed roof and plant supports took two. The bullets on this ASIN only say premium product, so the primer sentence on the smooth black tins is not printed here. One buyer expected a hammered pattern and got a smooth result, which matches the maker’s note that a thin or cold coat can show little texture. Others call it more runny than older Hammerite, thick and gloopy if the brush stops, and still dependent on old rust coming off first. The coverage field says corrosion protection rather than a rate, and 250 ml is a small job beside a 750 ml gate tin.
Pros
Cons
Best for: A small ferrous frame or a short run of railings where you want a textured black look.
Less suitable: A full gate that needs the film from a 750 ml tin, or a guaranteed hammered pattern in the cold.
Specifications
Common questions
Does the hammered black 250 ml state a coverage rate?
No. The coverage field is the words corrosion protection. Reviews describe one 250 ml tin covering front railings or a garden gate after loose rust was brushed off.
Will the hammered finish always look textured?
The finish type is textured and the item type is hammered metal paint. One UK review expected a hammered pattern and says the result came out smooth.
Is this tin listed as waterproof?
Is Waterproof is not specified. Water Resistance Level says waterproof. The listing question is unanswered.
Hammerite Direct to Rust smooth black 750 ml, model 5092966, is £22.00 with 4.7 from 1,454 reviews, and the bullets say you can paint directly onto rust with an up-to-8-years line that is the maker’s claim. Reviewers use the smooth black on fence railings, posts, patio sets and wrought-iron fencing, and one two-year side-by-side showed rust through a cheaper retail paint only. They also call it very thick, like treacle, and pricey against other shops, including one return because it was cheaper elsewhere. Prep is still required: a coastal-gate review used heavy rust removal and an oxidising coat first. One review describes a matte black result while the bullets say a smooth glossy finish. Coverage on the listing is about 10–12 m² per litre, while Hammerite’s UK page and a trade sheet for this manufacturer ID sit nearer 5 m² per litre. At £1.57 more than the top-pick tin, with fewer reviews, it is the same gloss-black job rather than a stronger enamel.
Pros
Cons
Best for: The same gloss black outdoor steel job when this exact 750 ml listing is the one in stock.
Less suitable: Choosing on review depth or price, or a white, silver, hammered or converter job.
Specifications
Common questions
Can you paint Hammerite 5092966 straight onto rust?
The bullets say paint directly onto rust and call it a primer, undercoat and topcoat. Reviews still describe sanding or cleaning rust, and one coastal-gate review used a red oxide coat first.
Is the 750 ml smooth black waterproof?
The listing says Is Waterproof false and Water Resistance Level water resistant. The waterproof question on the page is unanswered.
How much area does the 750 ml tin claim?
The coverage field says approximately 10–12 square metres per litre. It does not state how many coats that figure assumes.
Hammerite smooth white 250 ml, model 5084857, is £9.99, listed as high-gloss and direct to rust, with an up-to-8-years line that remains the maker’s claim. The star line is 4.6 from 20,430 reviews, the same figure as the silver 250 ml ASIN, and the captured reviews name white, red, yellow, blue and other colours, so treat that count as a shared parent pool. In that pool, wire-brushing then two thin coats is the method reviewers describe, and a garage-door review still used an undercoat. Pale colours in the same set hide poorly and need at least two coats. The paint is called very thick, hard to brush, and liable to dry on the brush. Coverage is stated as 3 m² per 250 ml, which scales above Hammerite’s UK figure of about 5 m² per litre, and the dry-time field says 1 hour while the full-cure field says 8 years. Heat resistance is asked and not answered. At 250 ml it is a small white repair on ferrous metal, not a gate tin.
Pros
Cons
Best for: A small ferrous item that has to stay white, if you budget two coats and ignore the shared review total.
Less suitable: A black gate, bare galvanised steel, or a stove that needs a stated temperature limit.
Specifications
Common questions
Does the smooth white 250 ml need a primer?
The bullets say direct to rust. The primer question is unanswered. One garage-door review in the shared set still used an undercoat.
Is Hammerite smooth white heat resistant?
The listing asks the question and does not answer it. No temperature limit is in the specification table. Reviews mention a radiator and a fireplace.
Are the 20,430 reviews only for white?
The saved listing’s first 50 reviews are the shared Direct to Rust smooth parent. Reviewers name red, yellow, blue and other colours as well as white.
Hammerite smooth silver 250 ml, model 5084894, is £10.25, and the bullets say no primer, paint straight onto rusty metal, and up to 8 years, naming gates, railings, garden furniture, doors and fences. The coverage field is 5 m² per litre, which matches Hammerite’s UK figure, unlike the 10–12 m² lines on the black 750 ml listings. The 4.6 from 20,430 reviews is the same parent pool as the white tin. Only one of the 50 captured reviews clearly describes silver: callipers restored with one thin coat, with a warning not to over-apply. The title says indoor and outdoor, the indoor/outdoor field says outdoor, and heat resistance is unanswered. Dry time is listed as 24 hours and the full-cure field as 1 hour. The paint-type field says oil and a brush is listed. It is the small silver colour coat in this set, still a 250 ml repair, and still the wrong first coat for bare galvanised steel.
Pros
Cons
Best for: A small ferrous fitting where silver is the colour and one thin coat is enough.
Less suitable: A full black gate, bare zinc or galvanised metal, or anyone reading 20,430 as reviews of this tin only.
Specifications
Common questions
Can the silver 250 ml go straight onto rust?
The bullets say no primer and paint straight onto rusty metal, for gates, railings, garden furniture, doors and fences.
Is this silver tin for indoor metal?
The title and bullets say indoor and outdoor. The indoor/outdoor field says outdoor. Heat resistance is asked and not answered.
Do the 20,430 reviews describe this silver tin?
The first 50 reviews match the white ASIN. One of them describes silver callipers in one thin coat. The count is the shared parent total.
Hammerite Kurust 90 ml, model 5092819, is £7.20 with 4.6 from 4,655 reviews, sold as a water-based blister rather than a coloured enamel. Reviewers describe remaining rust turning dark or blue-black within minutes, including a washing-machine panel in 10 to 15 minutes, and they overcoat in about 3 hours. The jobs are small: a tow bar, a door, a bench, a fence patch, car stone chips and a motorbike. A little goes a long way once you accept the size, and several buyers call it good value for that reason. The same reviews say 90 ml is smaller than expected, the liquid is runny and messy, and it can lift the black coating on pliers. One buyer received a brick-red liquid when they wanted a body-colour match, which this blister does not claim. Listing coverage is 0.9–1.08 m² per 90 ml, while Hammerite’s Kurust page quotes 20–25 m² per litre. It is the best value here for a small ferrous spot you will still paint over, not the finish for a gate.
Pros
Cons
Best for: A chip or a small rust pit on ferrous metal that you will overcoat the same day.
Less suitable: A whole gate in gloss black, or a job where the liquid itself has to match the body colour.
Specifications
Common questions
Is Hammerite Kurust 90 ml a coloured topcoat?
No colour-coat claim is in the bullets, which only say premium product. Reviews describe a blue-black or dark reaction on rust, then a topcoat. One reviewer says overpaint after 3 hours.
Can you use Kurust indoors?
The indoor question is unanswered. The indoor/outdoor field says indoor, and specific uses say interior/exterior. Reviews include a washing machine, a window reveal and a bath.
How far does 90 ml go?
The listing coverage is 0.9–1.08 m² per 90 ml. Reviewers use it on small patches and several say the bottle is smaller than they expected.
Rustins rust converter 250 ml, RUSC250, is £9.00 with 4.4 from 582 reviews, and the bullets limit it to ferrous iron and steel, not aluminium or other non-rusting metals. Reviewers say it turns rust black and can be overpainted, the watery liquid spreads a long way, and brushes clean in water. One reviewer treated the rust on a garage door with 250 ml after wire-brushing. The bullets say about 30 minutes at 15–25°C and a topcoat after a minimum of 3 hours, ideally the same day. Results are the limit: one review calls conversion inconsistent on a van and a bike unless the coat is thick or repeated, one saw rust again after a few months, and one expected blue-black and got a pale, yoghurt-like colour. A thick coat left grey bubbles for another buyer. The listing colour field says red, the dry-time field says 4 hours, and there is no coverage rate. It is the larger water-based converter when 90 ml will not reach the pits, and it is still not a coloured topcoat.
Pros
Cons
Best for: Corroded iron or steel that needs more than 90 ml of converter before a colour coat, at 15–25°C.
Less suitable: Aluminium, a gloss black finish from this bottle alone, or a surface you will not check for a colour change.
Specifications
Common questions
Does Rustins rust converter work on aluminium?
The bullets say ferrous iron and steel only, not aluminium or other non-rusting metals. Named uses include automotive parts, garden furniture, tools and radiators.
When can you paint over the Rustins converter?
The bullets say it dries in around 30 minutes and a topcoat goes on after a minimum of 3 hours, ideally the same day. Reapply if the area has not turned blue-black.
Is a primer still required?
The bullets say no separate primer. Some UK reviews still applied primer or red oxide before the finish coat.
Vividye’s 2 litre rust converter and metal primer, model V181uk, is £29.99 with 4.2 from 50 reviews, listed as water-based matte black for indoor and outdoor iron and steel. Reviewers brush it onto a trike frame, outdoor chairs, a side gate, garden railings and a barbecue, and several treat the matte black as the visible coat as well as a primer. The bullets say light rust at or under 120 μm can be coated directly, severe rust wants loose scale sandblasted off first, and you wait a minimum of 2 hours between coats. The same bullets call the flat black film a base for topcoats. Against that, one review says the paint is peeling off, one says rust came back through after two days, and several say outdoor durability is still unproven. The container-type field says aerosol can, while reviews describe a plastic bag inside a bucket that is awkward to open. Coverage is not a square-metre rate, waterproof is false, and the listing origin is China. It is the volume option for a large ferrous base coat, not the top pick for a garden gate.
Pros
Cons
Best for: A large ferrous area, such as a chassis or trailer, where a matte black base is the goal and you accept a thin review sample.
Less suitable: A gloss garden gate, galvanised or aluminium metal, or anyone who needs a proven winter from this listing.
Specifications
Common questions
Can Vividye go on heavy rust?
The bullets say remove loose scale by sandblasting on severe rust, and apply directly on light rust at or under 120 μm. Iron and steel are named. Aluminium and galvanised metal are not stated.
Is the 2 litre pack a spray can?
The container-type field says aerosol can. The form is liquid, the volume is 2 litres, and reviews describe a plastic bag inside a bucket plus brush application.
Is Vividye a finished decorative coat?
The bullets say the flat black finish is a base for topcoats. Reviews also leave it as the visible coat on gates and railings. One review reports peeling and one reports rust back in two days.
Eight amazon.co.uk anti-rust paint listings were scored from the stored listing files, the UK review texts captured for each ASIN, and the maker pages named below. This was not a lab test. Stars and review depth take the largest share: a 4.7 from thousands of reviews sits above a 4.2 from 50. A colour coat and a converter are scored as different products, so a high star line on a 90 ml blister does not outrank a 750 ml enamel for a gate. A coverage figure you can use, a named metal limit and a stated overcoat time come next. Price is judged against the job, so a spot treatment can be best value without the highest score. Conflicting size, dry-time, coverage or container fields are deducted, as are a shared review pool, a thin sample, peeling, or rust returning in the captured reviews. A listing that omits the primer or metal limit the rest of the range states is deducted. The up-to-8-years line stays a maker claim and is not added to a score. The top pick is the gloss black 750 ml tin with the deepest review sample at that score. Two other tins share 94, and the badge is not repeated. The best value is the lowest price for a reviewed spot converter, not the highest score.
Stars and review depth
40%The largest share of the score. A 4.7 from thousands of amazon.co.uk reviews sits above a 4.2 from 50. Stars are the listing average, not a lab corrosion test.
Fit for the job
25%A colour coat and a converter are scored as different products. A high star line on a 90 ml blister does not outrank a 750 ml enamel for a gate.
Spec you can use
20%A coverage figure that matches the maker’s about 5 m² per litre, a named metal limit, and a stated overcoat time. Conflicting size, dry-time, coverage or container fields are deducted.
Price against the job
15%Price is scored against the job in front of you. A spot treatment at the lowest price in this set can be best value without holding the highest score.
Start with the job, then the metal, then how much loose rust is left, then finish and pack size, then whether you are using solvent enamel or a water-based converter. The notes below follow that order. None of these listings was lab-tested.
Anti-rust paint on amazon.co.uk splits into a decorative direct-to-rust colour coat and a rust converter you still have to overcoat. UK buyers in this set are mostly painting steel gates, railings and garden metal, or dabbing a small rust spot before a topcoat. Quality starts with the metal. A direct-to-rust colour coat is specified for rusted or bare ferrous metal, not for bare zinc, aluminium or galvanised steel without the maker’s special primer or galvanised paint.
Direct to rust is not a licence to paint over loose scale. Flakes and grease still come off. Severe scale is not a brush-over. Sound old paint can take a test patch. Bare or rusty ferrous metal wants two coats.
Hammerite’s UK figure for Direct to Rust is about 5 m² per litre. Listing fields of 10–12 m² per litre conflict with that. A rule of thumb: 750 ml covers about 3.75 m² for the system. A 250 ml tin is a repair, not two coats on a pair of gates.
Bare zinc, aluminium and galvanised steel need the maker’s special primer or galvanised paint. Putting a direct-to-rust tin straight onto fresh galvanising is the wrong first coat. Call a professional if you do not have that primer.
Decide the job before the tin. A colour coat, smooth or hammered, is the finish you see. A converter is a treatment you still topcoat: a 90 ml water-based blister, a 250 ml ferrous-only liquid, or a 2 litre matte black base. The metal check is next. Direct-to-rust colour coats in this set are for rusted or bare ferrous iron and steel. Bare zinc, aluminium and galvanised steel are the wrong first coat unless you have the maker’s special primer or galvanised paint.
Smooth gloss black hides stains. A hammered pattern can hide pits if the texture forms, and a thin or cold coat can come out smooth. White and silver need more coats, and the 4.6 from 20,430 reviews on those two 250 ml listings is one shared parent pool, not a count for each tin. Read pack size against about 5 m² per litre, the maker’s UK figure for Hammerite Direct to Rust. Ignore a listing field of 10–12 m² per litre except as a conflict.
Three typical situations, each with a recommendation from this comparison.
You are painting ferrous gates or railings in gloss black. Hammerite smooth black 750 ml, model 5158235, is the top pick, at about £20.43 with 4.7 from 7,075 reviews. The title says 750 ml and the size field says 1 L. Listing coverage of 12 m² per litre conflicts with the maker’s about 5 m² per litre.
You have a chip or a small rust pit on ferrous metal and you will paint over it the same day. Hammerite Kurust 90 ml is the best value, at about £7.20 with 4.6 from 4,655 reviews. It is a water-based treatment, not a colour coat. Reviewers describe a dark reaction and an overcoat in about 3 hours.
You want a matte black base on a large ferrous area, such as a chassis or trailer. Vividye 2 L is about £29.99 with 4.2 from 50 reviews. The bullets allow light rust at or under 120 μm and call the flat film a base for topcoats. Fifty reviews do not prove a winter outdoors.
The top pick is Hammerite smooth black 750 ml, model 5158235, at about £20.43. It has 4.7 from 7,075 reviews, the deepest sample on a gloss black 750 ml colour coat. Two other tins share the score of 94, and the badge is not repeated. The title says 750 ml while the size field says 1 L, and listing coverage of 12 m² per litre conflicts with the maker’s about 5 m² per litre. The best value is Hammerite Kurust 90 ml at about £7.20, with 4.6 from 4,655 reviews. It is the lowest price for a reviewed spot converter, not the highest score, and you still overcoat it.
Hammerite smooth black 750 ml
Deepest review sample on the gloss black 750 ml colour coat. Two other tins share 94, so the badge is not repeated.
Hammerite Kurust 90 ml
Lowest price for a reviewed spot converter, at about £7.20, and not the highest score.
Editorial
Peter F. is the editor for DIY & tools at productscompared.co.uk. Comparisons in this category are checked against amazon.co.uk listings, review evidence and public UK sources.
Guides on what to look for, how to use a product, and common mistakes.
Public sources from the research digest, last checked on 22 October 2026. Shelf prices and star lines are the amazon.co.uk figures in the display file. The price band is this set, not a market average. No listing was lab-tested.
This page contains affiliate links to amazon.co.uk. If you buy through them, we may earn a commission at no extra cost to you. Prices, stars and review counts are the stored amazon.co.uk figures, not a live crawl. We did not lab-test these coatings.
