The best radiator spray paints, compared.
Top pick: PlastiKote Trade Gloss 400 ml Best value: Rust-Oleum Gloss 400 ml – Gloss white at about £10.56 with 4.4 from 561 reviews and a stated heat-resistant claim, not the cheapest can. Updated October 2026.
Radiator spray paint is heat-tolerant enamel sold in a 400 ml aerosol for wet central-heating radiators, pipes, and sometimes storage-heater covers. It is not wall emulsion and it is not a general hobby spray. You want a hard-wearing white, magnolia, or chrome-effect finish on fins and column sections, without brush marks, and you still have to mask, ventilate, and live with overspray. This comparison holds six amazon.co.uk aerosols after a fit check: satin white, gloss white, and four lines, including trade gloss and satin chrome. We judge them on the coverage the listing states, finish, dry and cure times, heat-resistance wording, and what reviews say about fumes and mist. They do not replace the safety data sheet or a maximum surface temperature on the tin. What to check on the tin before you order is set out in the [radiator spray paint buying guide](/hub/heating/radiator-spray-paint/sub/radiator-spray-paint-buying-guide).
Radiator spray paint is heat-tolerant enamel sold in a 400 ml aerosol for wet central-heating radiators, pipes, and sometimes storage-heater covers. It is not wall emulsion and it is not a general hobby spray.
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Personal buying guide
Question 1 of 2
What are you painting?
PlastiKote Trade gloss white at about £8.49 is the lowest price in these six cans, but amazon.co.uk shows only three ratings at 5.0 stars on the October 2026 listing. That star figure is not comparable with Hammerite's 1,155-review depth. You are largely buying on listing claims and brand familiarity. Coverage is quoted at about 1.25–1.75 m² per 400 ml can, among the smallest areas here, and heat-resistance and anti-yellowing were not stated in the listing bullets. Listing text flags fast drying, waterproofing, and good vertical stability, which matters if you spray column sections, yet there is little UK review detail on long-term yellowing or heat cycles. For a landlord touch-up on one flat panel the price is attractive if you buy a spare can for a second coat. For a whole house or a bathroom with poor ventilation, a better-reviewed satin white may be the safer default.
Pros
Cons
Best for: Budget gloss on one or two flat panels when you can buy a second can.
Less suitable: Heat-yellowing worries or jobs where you need proven UK review depth.
Specifications
Common questions
What coverage does the listing state?
The listing states about 1.25–1.75 m² per 400 ml can. That is one of the smaller areas in this comparison, so a second coat can need a second can.
Is this sold as radiator spray?
The amazon.co.uk title positions it for radiators or heated metal surfaces.
What finish is listed?
Gloss white. The listing does not state a heat-resistance figure in the bullets we read.
PlastiKote satin chrome is an effect finish rather than a white repair. The listing positions a chrome look with bullets citing heat resistance up to 300 °C and a non-yellowing formula. The October 2026 listing shows a single amazon.co.uk rating at 5.0 stars, so treat buyer satisfaction as anecdotal, not a trend. Coverage, touch-dry, and full-cure fields were not on the listing, which makes can-count planning guesswork unless you read the physical tin. At about £12.68 it is the most expensive aerosol in this comparison and suits statement radiators or matching metal accents more than hiding yellowed bedroom panels. Chrome spray shows every prep flaw under side light, so keying and degreasing matter as much as on gloss white. If you need a conventional white wet-system radiator, the satin or gloss white cans are the sensible starting point.
Pros
Cons
Best for: Feature radiators or metal-look schemes where chrome is intentional.
Less suitable: Standard white panel refreshes or buyers who need coverage data before ordering.
Specifications
Common questions
What coverage does the listing state?
Coverage is not stated on the October 2026 listing fields. Read the tin before you plan how many cans a column radiator needs.
Is this sold as radiator spray?
The amazon.co.uk title positions it for radiators or heated metal surfaces. The finish is satin chrome, not a white repair.
What finish is listed?
Satin chrome. A listing bullet cites heat resistance up to 300 °C. That is not a lab heat-cycle result.
Across 1,155 amazon.co.uk ratings at 4.6 stars, Hammerite's satin white aerosol is the most reviewed dedicated radiator spray in this set. UK buyers often report that two or three light coats over wet-and-dry prep make yellowed panels look new again, and many use leftover paint on visible pipes. The listing positions the can for water-filled radiators and pipes, with heat-resistant and anti-yellowing bullets, though that is marketing wording rather than a lab heat-cycle result. Coverage is quoted as 10–12 square metres per litre, which scales to roughly 4–4.8 m² from a 400 ml can on paper; reviewers still budget multiple cans once fins, backs, and overspray are counted. The recurring complaint is indoor solvent smell and mist that travels a metre or more, so masking must extend well beyond the radiator. Runs show up if coats are heavy or the metal was still warm. At about £9.23 it sits in the entry band for this comparison.
Pros
Cons
Best for: Column or fin-heavy radiators where you can mask widely and ventilate for several hours.
Less suitable: Small flats with poor ventilation or a single flat panel where a brush tin may be cheaper per square metre.
Specifications
Common questions
What coverage does the listing state?
The listing states 10–12 square metres per litre. On a 400 ml can that is about 4–4.8 m² on paper. Reviewers still budget extra cans for fins and the back.
Is this sold as radiator spray?
The amazon.co.uk title positions it for radiators or heated metal, including water-filled radiators and pipes.
What finish is listed?
Satin white enamel in a 400 ml aerosol.
Rust-Oleum's gloss white radiator enamel aerosol holds 561 amazon.co.uk ratings at 4.4 stars and is the best-value pick in this comparison, set against Hammerite. Reviewers who prep and mask properly often describe a smooth, even film that beats earlier brush attempts on living-room radiators. The listing coverage field is explicit at about 2 m² per 400 ml can, one of the smallest stated areas in this comparison, so a double panel with two light coats can empty a single tin. A manufacturer data sheet for this line cites roughly 2.5 m² per can, which is in the same ballpark but still not a promise on rust-heavy or finned steel. Mist travelling several metres and occasional nozzle failure mid-job appear in UK reviews, which is awkward when you have already keyed the surface. Touch-dry is listed at 24 hours on amazon.co.uk while full cure shows as 1 hour in the listing fields, so follow the tin you receive rather than this table alone. The October 2026 price is about £10.56.
Pros
Cons
Best for: Gloss white on a single or double panel when you accept two cans for larger jobs.
Less suitable: Whole-house refreshes on one purchase or rooms where overspray cannot be contained.
Specifications
Common questions
What coverage does the listing state?
The listing states about 2 m² per 400 ml can. A data sheet for this line cites about 2.5 m² per can. Neither figure is a promise on rusty fins.
Is this sold as radiator spray?
The amazon.co.uk title positions it for radiators or heated metal surfaces.
What finish is listed?
Gloss white enamel in a 400 ml aerosol.
PlastiKote's Twist & Spray white radiator line scores 4.3 from 732 amazon.co.uk ratings and is popular for speeding up fin work versus hand painting. Reviewers often mention a finer mist and relatively lower odour compared with some rival enamels, provided you hold the can at the distance on the sheet and keep passes light. Listing bullets cite heat resistance up to about 100 °C and a non-yellowing formula, with coverage quoted as 4–4.8 m² per litre. The colour story is mixed: several UK reviews say the result reads cream, magnolia, or clotted cream rather than brilliant white, while the finish field is semi-gloss. Runs on vertical faces and thick droplets when sprayed too close come up repeatedly, so the job takes longer than the can marketing suggests. At about £11.67 it sits above Hammerite and Rust-Oleum in these October 2026 prices. One buyer reported an empty can on delivery, though a replacement was sent quickly according to that review.
Pros
Cons
Best for: Fin-heavy radiators when you want semi-gloss and can accept a warmer white tone.
Less suitable: Matching fresh brilliant-white walls or jobs needing the brightest white in one can.
Specifications
Common questions
What coverage does the listing state?
The listing states 4–4.8 m² per litre, not a finished area for one 400 ml can. Do not read that line as 4 m² of radiator from a single tin.
Is this sold as radiator spray?
The amazon.co.uk title positions it for radiators or heated metal surfaces. Bullets cite heat resistance up to about 100 °C.
What finish is listed?
Semi-gloss white. Several UK reviews say the dried colour reads cream rather than brilliant white.
PlastiKote's magnolia gloss radiator spray is a deliberate colour choice, not a failed white. The listing names magnolia gloss and quotes modest coverage of about 1.5 m² per 400 ml can. With 62 amazon.co.uk ratings at 4.3 stars the evidence base is thinner than Hammerite or the white Twist & Spray line, but satisfied buyers describe a glossy magnolia finish on radiators and storage-heater covers after rust prep. Bullets repeat the non-yellowing wording and heat resistance up to about 100 °C seen on the white variant. Strong solvent smell during spraying and overspray beyond the masked zone appear in critical reviews, so the whole room needs covering, not just the floor under the panel. At least one UK review reports the nozzle blocking after a single use, which wastes paint if the job is not finished in one session. The October 2026 price is about £11.91. If you wanted brilliant white, choose this can only when magnolia matches your walls.
Pros
Cons
Best for: Radiators or heater covers that must match magnolia woodwork or walls.
Less suitable: Brilliant-white rooms or large doubles without buying several cans.
Specifications
Common questions
What coverage does the listing state?
The listing states about 1.5 m² per 400 ml can. A double panel with two coats can need more than one tin.
Is this sold as radiator spray?
The amazon.co.uk title positions it for radiators or heated metal. The colour is magnolia gloss, not brilliant white.
What finish is listed?
Magnolia gloss. Bullets cite a non-yellowing formula and heat resistance up to about 100 °C.
Six amazon.co.uk aerosols are compared from listings read for October 2026. The score weights the Amazon average and review count at 35%, stated heat resistance and radiator positioning at 20%, coverage per can at 15%, price within these six cans at 15%, and review comments on overspray and prep at 15%. There is no heat-cycle lab test. A coverage line or a temperature bullet is the seller's text. The top pick is Hammerite satin white, the highest score and the largest review file. Best value is Rust-Oleum gloss white, for a stated heat claim and review depth at a mid price, not because it is the cheapest can.
Amazon rating and reviews
35%Stars and review count come from the amazon.co.uk listing for that ASIN. Hammerite is 4.6 from 1,155 reviews. Twist and spray is 4.3 from 732. Rust-Oleum is 4.4 from 561. A 5.0 average on three reviews, or on one, is not the same evidence.
Heat claim and radiator fit
20%The title should position the can for radiators or heated metal. Bullets that state heat resistance, including up to 100 °C or 300 °C, score here. A missing heat line does not. None of this is a lab heat-cycle result.
Coverage per can
15%The coverage figure is the one printed for that listing, whether per can or per litre. Rust-Oleum states about 2 m² per 400 ml. Hammerite states 10–12 m² per litre. A blank coverage field cannot be filled in.
Price in this set
15%Shelf price is the October 2026 amazon.co.uk figure, from about £8.49 to about £12.68. The lowest price does not win best value. That badge is Rust-Oleum gloss white at about £10.56.
Overspray and prep reviews
15%UK reviews are read for fumes, mist travel, runs, nozzle faults, and whether light coats over a keyed, cool radiator are what buyers describe. Those comments do not replace the safety data sheet.
Radiator spray paint is a 400 ml aerosol for a cool, degreased radiator, not a wall emulsion and not a brush tin. The choice is finish and colour, then the coverage figure on that listing, then whether you can mask and ventilate. Prices and stars here are amazon.co.uk listings from October 2026. This is not a heat-cycle lab test.
A radiator spray paint in this comparison is a 400 ml aerosol of heat-tolerant enamel for a wet central-heating radiator, the pipes you can see, and sometimes a storage-heater cover. It is not wall emulsion, not a general hobby spray, and not a brush tin. The six cans are Hammerite satin white, Rust-Oleum gloss white, and four PlastiKote lines: twist and spray white, magnolia gloss, trade gloss white, and satin chrome.
Cool the appliance first. Heavy coats on warm metal run, and heat before the film has cured softens it or traps odour. Follow the tin, not a single field, when touch-dry and full cure disagree.
Coverage on these listings is often about 1–2 m² per 400 ml can, or a per-litre figure that is not the same thing. Column radiators and a second coat need a spare can.
Reviews describe solvent mist a metre or more from the radiator. Mask walls and valves, open windows, and keep ignition sources away. The can does not fix a leak.
Confirm the aerosol is sold for radiators or heated metal, then read coverage on that listing only. Rust-Oleum states about 2 m² per 400 ml can. Magnolia states about 1.5 m². Trade gloss states about 1.25–1.75 m². Hammerite states 10–12 m² per litre, which is about 4–4.8 m² from a 400 ml can on paper. Twist and spray states 4–4.8 m² per litre. Satin chrome has no coverage figure in this set of listings. A rule of thumb is one 400 ml can for one medium radiator in two light coats.
Cool the radiator, degrease, and key the surface. Primer belongs on bare rust when the tin asks for it. Mask walls, floors and TRVs. Crown and DIY Doctor both start from a cold appliance. Solvent mist travels, which is why reviews complain about smell beyond the radiator, and why a short indoor job still needs open windows. UK aerosol rules cover flammable contents. Keep ignition sources away. Leave the heating off until the tin's cure time, not merely until the paint feels dry.
Three typical situations, each with a recommendation from this comparison.
You are spraying a column or a finned radiator, and brushing the gaps would take all day. Hammerite satin white is the top pick at about £9.23, with 4.6 from 1,155 reviews. Mask well past the radiator. Reviewers still use more than one 400 ml can once the back and the fins are included.
You want a yellowed panel to look fresher and you can open a window. PlastiKote Twist & Spray is about £11.67, with 4.3 from 732 reviews. Reviewers often mention a finer mist and comparatively lower odour. Several also say the white reads cream. The heat bullet cites about 100 °C. That is listing text, not a lab result.
You need a visual refresh on one or two flat panels, and you can wait for the tin to cure before the heating goes back on. PlastiKote Trade gloss white is about £8.49, the lowest price here, with three reviews at 5.0 stars on the October 2026 listing. Buy a second can. The listing does not state a heat-resistance figure.
The top pick is Hammerite satin white at about £9.23. It has the highest score in this comparison and the largest review file, 4.6 from 1,155 reviews, with satin white positioned for water-filled radiators and pipes. Best value is Rust-Oleum gloss white at about £10.56, with 4.4 from 561 reviews, a stated heat-resistant claim, and about 2 m² listed per 400 ml can. Skip Hammerite if you cannot ventilate, or if one flat panel would be simpler with a brush. Skip Rust-Oleum if one can has to cover several doubles, or if you want the lowest shelf price.
Rust-Oleum Gloss 400 ml
Gloss white at about £10.56 with 4.4 from 561 reviews and a stated heat-resistant claim, not the cheapest can.
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 UK sources named below. amazon.co.uk prices, stars and review counts on these six listings were taken from the listing files read for October 2026. Page updated October 2026.
This page contains affiliate links to amazon.co.uk (tag pcuk26-21). If you buy through them, we may earn a commission at no extra cost to you. Prices, stars and review counts are taken from those listings. We did not run a lab test.
