Metal Primers
The Paint Shed supplies a range of trade-quality metal primers for both interior and exterior use. Our collection includes high-performance priming solutions from leading trade and designer brands, including Benjamin Moore, Armstead Trade, Little Greene, Coo-Var and Tikkurila.
Explore our other specialist ranges:
Protect metal surfaces and enhance adhesion with our range of metal primers. Order online today and enjoy free standard delivery on mainland UK orders over £50*.
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Johnstone's Trade Stormshield Aqua Guard Exterior Undercoat Brilliant WhiteSpecial Price £49.92 £41.60 Was £62.40Saving: £12.48-20% -
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Johnstone's Trade Stormshield Aqua Guard Exterior Undercoat Tinted Colour MatchFrom £60.96 £50.80 Was £76.20-20% -
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Metal primers are specially formulated to ensure paint will adhere properly on bare metal, previously painted surfaces and tricky substrates like galvanised metal and aluminium. Applied correctly, they create a smooth, stable foundation that helps your topcoat bond cleanly, resist corrosion and last longer on the job.
The right metal primer:
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Improves topcoat adhesion, ensuring paint bonds securely and resists peeling
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Provides corrosion resistance through zinc phosphate, red oxide or proprietary anti-rust technology
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Extends the lifespan of your finish coat, reducing the need for frequent repaints
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Creates a smooth, stable foundation for a professional-looking result
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Helps protect bare metal from moisture, oxidation and the elements
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Increases durability and extends coating lifespan, particularly on high-traffic surfaces like gates and railings
Choosing the best primer for your metal and environment is the difference between a finish that lasts and one that fails. Explore our range of specialist solutions to find the right primer for your metal type, environment and job.
Rust-Inhibiting Primers
For ferrous metals such as iron and steel, which are prone to corrosion, rust-inhibiting primers are the industry standard. Anti-corrosive primers like zinc phosphate and red oxide formulations both provide long-term protection against rust and moisture ingress, creating a stable base for your topcoat. Some of our most popular options include:
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Dulux Trade Metalshield Zinc Phosphate Primer: An oil-based, high-build primer with exceptional rust resistance. This quick-drying paint is suitable for hand-cleaned and blast-cleaned iron and steel, offering up to 8 years of rust protection when paired with a Dulux Trade Metalshield topcoat.
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Armstead Trade Metal Primer Zinc Phosphate: A professional-grade primer with excellent adhesion and heat stability for interior and exterior use. Its zinc phosphate formulation helps prevent rust and corrosion on ferrous surfaces.
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Coo-Var Red Oxide Metal Primer: Delivers long-lasting anti-corrosive protection for structural metals. Ideal for interior and exterior ferrous surfaces where a traditional red oxide base is required.
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Armstead Trade Red Oxide Metal Primer: A high-performance primer for ferrous metals, specially formulated to prepare iron and steel before decorative topcoats are applied.
All-Metal & Multi-Surface Primers
When your job spans multiple substrates, or you need a versatile primer for general use, multi-surface formulations provide flexibility without compromising on adhesion. These options work across ferrous, non-ferrous, and in some cases non-metal surfaces too.
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Coo-Var All Metal Primer: A water-based anti-corrosive primer for most metal surfaces, suitable for both interior and exterior use. Available in grey or red.
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Dulux Trade Metalshield Quick Dry Primer: A water-based primer suitable for ferrous and non-ferrous metal. Fast-drying and easy to apply, it pairs well with Dulux Trade Metalshield Gloss for a long-lasting professional finish.
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Little Greene Intelligent All Surface Primer: A reliable, virtually odourless primer that works across multiple surfaces, including wood and metal, providing a consistent base for your chosen topcoat.
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Farrow & Ball Metal Primer and Undercoat: Enhances colour depth and creates a durable, rust-resistant foundation on bare ferrous metal, ideal for downpipes, gates, radiators and ironwork.
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Tikkurila Everal Aqua Primer: A water-based primer undercoat for interior surfaces. Delivers superior adhesion across doors, windows, furniture and frames in both bare wood and metal.
Specialist Bonding & Non-Ferrous Primers
Our specialist bonding primers provide the extra adhesion that standard ferrous primers can't deliver. These are ideal for aluminium, galvanised steel, copper, brass, stainless steel and other hard-to-coat surfaces.
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Tikkurila Rostex Super Akva: A fast-drying, water-based primer with anti-corrosion properties. Specifically formulated for zinc-coated steel, aluminium, copper, brass and stainless steel.
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Benjamin Moore Insl-X Stix Primer: High-bonding primer for hard-to-coat interior and exterior surfaces, including glossy metal, plastic, ceramic tiles and melamine. Low-odour and low-VOC, making it ideal for occupied interiors.
Exterior Primer Undercoats
For exterior projects where colour consistency matters, or where metal and exterior wood are being painted together, water-based primer undercoats give you a weather-resistant, colour-matchable base before your topcoat goes on.
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Johnstone's Trade Stormshield Aqua Guard Exterior Undercoat: A fast-drying, water-based undercoat for exterior wood and metal. Its low-odour formula offers easy application and excellent opacity and can be custom-tinted to match your chosen topcoat.
Not sure which product is ideal for your project? Contact us or visit us in-store for product-specific advice.
FAQs
For most metal painting jobs, a primer is essential. Bare metal, rusted surfaces and non-ferrous substrates like aluminium all need a specialist primer to promote adhesion and block corrosion.
A good checklist to follow in deciding whether to use a metal primer is as follows:
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Is the metal in bad condition?
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Is this a new or bare metal?
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Is this metal located outside?
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Is this metal already rusted?
If you answered “Yes” to any of these questions, you should be priming. Previously painted metal in good condition can usually be cleaned and recoated directly, but any bare spots, rust patches or glossy surfaces should be spot-primed before you apply your topcoat.
Surface prep is critical for lasting results. Follow these steps before you open your primer:
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Remove loose rust using a wire brush or rust remover.
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Stabilise stubborn corrosion with a rust converter, a chemical treatment that stabilises rust on areas too heavy to brush off.
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Degrease the surface to remove any oil, grease or contamination that would stop your primer from bonding. Zinsser Universal Cleaner & Degreaser is a reliable option.
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Allow the surface to dry fully before applying your first coat.
Drying times vary by product, film thickness, temperature and humidity. Most trade metal primers are touch-dry within 30 minutes to 2 hours and ready for recoating within 2 to 4 hours at 20°C. Water-based options tend to dry faster than solvent-based equivalents. Always check the product d What paint should I use after priming metal? ata sheet for exact drying times.
After priming, apply a compatible metal paint or protective finish. It’s recommended to use a topcoat from the same manufacturer as the primer, where possible, as primer and topcoat systems are formulated to work together.
Both protect ferrous metals from rust, but they work differently.
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Zinc phosphate primers offer higher-performance corrosion protection and a harder, more durable finish, making them ideal for exterior steel, gates, fences, railings and machinery.
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Red oxide primers are a traditional, cost-effective choice for general ferrous priming. They're still highly effective, but typically lower-build than zinc phosphate. For heavy-duty or long-life jobs, zinc phosphate is the safer pick.
A primer prepares the surface, promotes adhesion, seals the substrate, and often blocks rust or stains. An undercoat builds film thickness, evens out the surface, and helps your topcoat achieve its intended colour and finish.
Shop Metal Primers at The Paint Shed
The Paint Shed is the UK's most recommended independent paint retailer. We aim to make it easier, quicker, fairer and simpler to buy trade-quality paint solutions at competitive prices.
Why choose us?
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Specialist paints from leading trade brands
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In-house colour-matching service
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Click & Collect available at 24 stores across Scotland and North England
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Expert tips and advice from our experienced team
Get the base right with specialised metal primers from The Paint Shed. Order online today and enjoy 5% off your first order when you sign up to our newsletter.