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Zinc paint buying guide

Updated: October 2026

A hinge on a garden gate, a scuff on a trailer chassis or a bright scar on outdoor steel is often too awkward to send back to a galvaniser. You still need a can that matches the job, because the wording on the cap will not. This zinc paint buying guide is the check before you open the [zinc paint comparison](/hub/paints-and-varnishes/zinc-paint), so you can choose a silver colour match, a high dry-film zinc film, a grey primer or a weld-zone claim. Products Compared used amazon.co.uk listings and public UK notes in October 2026. A qualifying purchase through our links can earn a commission at no extra cost to you.

A hinge on a garden gate, a scuff on a trailer chassis or a bright scar on outdoor steel is often too awkward to send back to a galvaniser.

Our top picks

Action Can Action Can ZG-90 500 ml

Best overall

Action Can Action Can ZG-90 500 ml
9.4/10about £10.77
View offer
Hycote Hycote XUK207 twin pack

Rank 2

Hycote Hycote XUK207 twin pack
8.4/10about £19.12
View offer
Motip Motip M04061 400 ml

Best value

Motip Motip M04061 400 ml
8.8/10about £8.96
View offer
On this page
  1. 1.What you are actually buying
  2. 2.Dry-film zinc, not purity
  3. 3.Conductive or a colour-match barrier
  4. 4.Listing conflicts to settle before you pay
  5. 5.Which check comes next

What you are actually buying

These aerosols are paint for bare steel or a small repair on galvanised steel, not a molten-zinc bath and not a craft metallic. Titles such as cold galvanising spray, zinc rich paint and zinc primer aerosol cover four jobs here: a bright colour match, a high dry-film zinc film, a grey primer under a later colour, and a weld claim.

Dry-film zinc, not purity

Purity and zinc in the dry film are different, and the purity line is how a thin coat gets mistaken for a repair. The Institute of Corrosion describes zinc-rich behaviour as contact between zinc particles in the dried film, from about 77% zinc by weight, on steel blast-cleaned to Sa 2½. The Galvanizers Association looks for ideally at least 80% zinc by weight, built to about 100 micrometres, for a repair under EN ISO 1461. Motip's page for 04061 states more than 90% zinc in the dry film. Hycote states over 60% zinc metal in the dry coating, under the 77% line, so it is the grey primer here rather than the repair film.
Action Can Action Can ZG-90 500 ml

Testsieger

Action Can Action Can ZG-90 500 ml
9.4/10about £10.77
View offer

Conductive or a colour-match barrier

Cold galvanising on a label does not mean the dried film protects steel the way a zinc coating does. Action Can states that ZG-90 is non-conductive. Motip's amazon.co.uk listing speaks of cathodic prevention and says the spray is spot-weldable, while the dry-film figure above 90% sits on the maker page.

Listing conflicts to settle before you pay

A waterproof tick, a colour name and a coverage figure count only when the fields agree. On ZG-90, waterproof fields on the multipacks disagree with the single can of part 1785, so treat the tick as unproven until the listing and the maker's sheet match. OB41 was £13.00, with 4.5 from 39 reviews, yet one colour field says yellow and the colour code says grey metallic. Simoniz puts weld-through in the title, and reviews dispute it, so that job waits for its own page.

Which check comes next

If you want one can named for a colour match, a high dry-film zinc film, a grey primer or a weld zone, use best zinc paint. If the question is whether the whole gate or trailer should go back to a galvaniser, read zinc paint versus hot-dip galvanising. A weld, a drilled hole or a cut end belongs on zinc paint for welds and cut ends.

Common questions

What should you check before you buy zinc paint?
Check the job, then zinc in the dry film, then whether the maker calls the film conductive. A colour match, a repair near 80% zinc and 100 micrometres, a grey primer and a weld-zone can are four purchases. Then look for fields that disagree, such as a waterproof tick or a colour name against the colour code. A low price does not settle those checks.
Is zinc purity the same as zinc in the dry film?
No. Purity describes the zinc metal, and dry-film zinc is what remains after the solvents leave. The Institute of Corrosion puts zinc-rich contact near 77% zinc by weight in the dry film. A "98%" line is often purity only. Soudal's UK sheet pairs 98% purity with 20% solids, so the dried film can hold much less zinc than that purity figure suggests.
Does cold galvanising mean the can protects steel the way a zinc coating does?
Only if zinc particles in the dried film touch, near the levels those notes describe. The phrase on the cap does not prove it. Action Can states that ZG-90 is non-conductive, so it is a colour-match barrier in the maker's words. Motip's listing states cathodic prevention, and that claim still needs clean steel.
Which job is a colour-match spray, and which needs a high dry-film zinc figure?
Use a colour-match spray to hide a small bright scar on new galvanising when the look matters more than a conductive film. ZG-90 is that can here, hard dry in about twenty minutes at 20°C. Use a high dry-film figure on bare steel when you want the Institute and Galvanizers Association levels. Motip's maker page states more than 90% in the dry film, and Hycote's "over 60%" stays under 77%.
Why do waterproof ticks on the same part number disagree?
The amazon.co.uk fields for Action Can ZG-90 do not match across pack sizes. Multipack listings disagree with the single can of part 1785 on waterproof. That is a cataloguing conflict, not a water test. Until the listing and the maker's sheet agree, do not treat the tick as proof that one pack sheds water.
When is a grey primer enough, and when is it the wrong can?
A grey primer is enough when a colour will cover it and you are not chasing a zinc-rich repair thickness. Hycote's twin, at £19.12 with 4.5 from 107 reviews, states over 60% zinc metal in the dry coating. It is the wrong can near the Institute's 77%, or for a build of about 100 micrometres. The lower figure is the reason to leave it.

Related pages

How to apply zinc paint

Zinc paint

Best zinc paint: colour match, zinc film or primer

Zinc paint for welds and cut ends on galvanised steel

Zinc paint vs hot-dip galvanising for small repairs

Sources

Public UK sources used for the repair and safety points on this page. Prices, stars and review counts are from the amazon.co.uk listings on 16 October 2026.

  1. Galvanizers Association — Repair of galvanized steel (retrieved 16 October 2026)
  2. Galvanizers Association — Coating repair datasheet (retrieved 16 October 2026)
  3. EGGA — Specification guidance (retrieved 16 October 2026)
  4. Action Can — ZG-90 (retrieved 16 October 2026)
  5. Motip — Zinc spray 04061 (retrieved 16 October 2026)
  6. Institute of Corrosion — Zinc-rich coatings (retrieved 16 October 2026)
  7. VOC in Paints, Varnishes and Vehicle Refinishing Products Regulations 2012 (retrieved 16 October 2026)
  8. HSE — Respiratory protective equipment in bodyshops (retrieved 16 October 2026)