Sherwin-Williams Acrolon C137V2

Sherwin-Williams Acrolon C137V2 (formerly Resistex C137V2) is a high performance, fast drying acrylic urethane gloss finish for use where long term exterior gloss and colour retention characteristics are required. Acrolon C137V2 is suitable for use as a final coat(s) in conjunction with epoxy or polyurethane based protective systems for new...

Price £71.95 Regular price £79.94
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Sherwin-Williams Macropoxy 400

Macropoxy 400 (formerly known as Sherwin-Williams Macropoxy C400V3) multi-functional epoxy zinc phosphate coating is suitable for the protection of steelwork in a range of exposure environments from C1 to C5. It was recently used on The Shard (London) for corrosion protection. Recommended Uses Buildings Car parks Petrochemical plants...

Price £58.12 Regular price £64.58
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Thermoguard Thermocoat W

Thermoguard Thermocoat W is a White Intumescent Paint for steel, structural steel and cast iron:  Up to 90 minutes’ fire resistance Can be overcoated with compatible decorative topcoat Water-based Low odour Environmentally friendly Cost effective for large projects Certificate of supply available on request Can be applied by brush,...

Price £46.80 Regular price £52.00
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Rust-Oleum 7100NS Anti-Slip Floor Coating

Rust-Oleum 7100NS Anti-Slip Floor Coating is an easy to apply, solvent based anti-slip floor coating: For foot traffic, interior and exterior Anti-slip additive is premixed in the coating For use on old concrete (>2 yrs), metal and wood Unique uniform appearance, high gloss Touch dry: 6 hours, coverage: 8m² per litre Available in...

Price £34.36 Regular price £38.18
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Primers & Undercoats

The range of rust inhibiting primer and undercoats for metal available at Rawlins Paints are compatible with products from the range of topcoats available by the same manufacturer (please refer to product datasheets for product combination recommendations) and provide the perfect start to any painting project. Using the correct metal primer with not only give superior adhesion, allow better coverage, and stain hiding power, it will also protect the underlying metal from rust.

It’s important to choose the right metal primer or undercoat for a project, whether you're looking for something to adhere to a difficult surface, prevent rust from forming, stabilise existing rust or a high-performance system that is going to stand the test of time we have a product suitable. Many of the primers and undercoats available from Coo-Var, International, Jotun, Sherwin-Williams and Rust-Oleum, amongst other manufacturers, have impressive certificates and approvals - including hygiene ratings, fire ratings, Network Rail approval, Highways Agency approval, London Underground approval and more. Ask our Technical Team for help in choosing the right primer or undercoat for your project.

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Rust-Oleum 3369/3380 CombiPrimer Anti-Corrosion

Rust-Oleum 3369/3380 CombiPrimer Anti-Corrosion is a high quality anti-rust primer for Rust-Oleum CombiColor. The Anti-Corrosion Primer will ensure an even longer anti-rust protection on new or rusted steel surfaces and provides and enhances protection against corrosion. Recoatable after 2 hours For new / slightly rusted surfaces Grey for...

Price £7.47
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Rust-Oleum 3302 CombiPrimer Adhesion

A primer from Rust-Oleum to make difficult smooth surfaces coatable. CombiPrimer Adhesion is ideal for use on galvanised steel, stainless steel, aluminium, copper, glass, porcelain and other smooth, dense surfaces that normal paints cannot stick to. Easy to apply Transparent blue finish Ideal for galvanised steel Also adheres to...

Price £7.47
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Rust-Oleum Mathys Pegalink Universal Adhesion Primer

Rust-Oleum Mathys Pegalink Universal Adhesion Primer is a water based primer for indoor and outdoor use. Adheres to many surfaces: wood, gypsum, cement, bricks and especially on smooth and difficult to adhere to surfaces like: galvanised steel, copper, zinc, polycarbonate, hard PVC, Pegagraff Hydro, etc. Excellent adhesion Flexible UV-resistant Excellent...

Price £14.97
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Rust-Oleum Hard Hat 2185/1085 Galva Zinc

Rust-Oleum Hard Hat 2185/1085 Galva Zinc is the No.1 high zinc content coating providing superior protection and durability for metals exposed to the elements or adverse artificial conditions. Can be used as a primer or as a single coat in light industrial exposures, corrosive environments and high humidity areas. 90% zinc content, touch dry...

Price £10.24
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Rust-Oleum Hard Hat 2117/1017 Galva Zinc Alu

Rust-Oleum Hard Hat 2117/1017 Galva Zinc Alu is an esthetically pleasing cathodic protection for damaged galvanised steel. A fast drying, zinc rich coating based on an epoxy ester resin, this product contains pure zinc and aluminium as pigments and provides cathodic protection. Zinc coating with sparkling aluminium particles Resists 340...

Price £9.84
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Rust-Oleum 569/580 Quick Drying Metal Primer

Rust-Oleum 569/580 Quick Drying Metal Primer is a single pack quick drying metal primer for bare and lightly rusted metal. It should be used on new, blasted or slightly rusted steel surfaces. Depending on the exposure conditions, it can be recoated with a variety of Rust-Oleum Systems assuring the appropriate protection. Available in 150+...

Price £17.29
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Rust-Oleum 769/780 Damp-Proof Rust Primer

Rust-Oleum 769/780 Damp-Proof Rust Primer is a single pack rust primer for direct application on slightly moist or dry metal surfaces. It is specially developed to be applied on hand tool prepared sound rusted steel surfaces. Available in 150+ RAL colours Requires minimal surface preparation Penetrates deep into the rust for optimal...

Price £15.47
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Rust-Oleum 9169 Epoxy Rust Primer

Rust-Oleum 9169 Epoxy Rust Primer is a low viscous epoxy rust-primer with outstanding adhesion and corrosion protection for manually derusted metals and can be recoated with Rust-Oleum 9100 topcoats. Can be applied directly to sound rusted surfaces (less work) Penetrates through rust onto sound metal Contains a high amount of rust...

Price £118.52
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Rust-Oleum 9170/9180 Epoxy Metal Primer

Rust-Oleum 9170/9180 Epoxy Metal Primer is a fast drying metal primer based on two-component epoxy resin offering extra protection against corrosion on bare or blasted metal, also ideal for galvanised metal under severe conditions. High build primer for optimal opacity with topcoat 9100 Touch dry after just 1 hour Contains a high amount...

Price £118.52
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Rust-Oleum 3202 Galvinoleum Primer

Rust-Oleum 3202 Galvinoleum Primer is a single pack super adhesion primer for galvanised steel, plastic or other smooth surfaces. Should be used on galvanised steel, stainless steel, aluminium, copper, glass, porcelain and other smooth, dense surfaces. Only intended for brush application and can be recoated with Rust-Oleum 7500 Alkythane....

Price £16.07
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Rust-Oleum 1060/1080 High Build Metal Primer

Rust-Oleum 1060/1080 High Build Metal Primer is for extra protection of bare or blasted metal, offers maximum durability under severely corrosive conditions. It assures appropriate protection under light industrial exposure conditions, if applied on a Rust-Oleum metal primer followed by Rust-Oleum 7500 Alkythane. Available in 150+ RAL...

Price £91.31
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407 Multi Surface Primer

407 Multi Surface Primer is a primer/sealer which offers excellent stain blocking and alkali resisting properties across substrates such as tiles, wood, metal (including galvanised), plaster, existing paint, masonry and most plastic. Single pack Internal or external use Gives excellent coverage to a multitude of stains Touch dry in just...

Price £23.39
In stock

Rawlins Paints stock over 150 metal primers and undercoats, for any scaled project or environment – no matter how extreme the weather conditions are for external application. These range from Rust-Oleum’s CombiPrimer products for smaller surface areas, to Jotun’s Penguard, Pilot and Barrier ranges for larger surface areas in less hospitable environments – such as offshore areas. With many factors determining which primer will be best suit requirements, these may include one or more of the following:

  • Heat resistant surface requirements
  • Full anti-corrosive or chemically resistant system installation
  • Minimum business downtime on a maintenance or extension build
  • A new, submerged environment installation
  • Surface rust present
  • Exposure to high winds, rain, damp/moisture, or sunshine/UV
  • Flexibility and extra durability to protect against light vehicular traffic

Each product page will contain at least one datasheet documenting touch-dry times, surface preparation requirements, storage and application cleaning advice, and when the primer can have additional product coatings applied. Incorrectly applied coatings on-top of the primer/undercoat can drastically jeopardise its protective, rust-inhibiting, chemically resistant properties – so always follow application guidelines in the datasheets.

Rawlins Paints’ blog features many articles detailing how rust-inhibiting primers work, full system installations from primers to topcoats, product recommendations for specialist or unusual environments, as well as topics including how to paint on or over stainless steel.

When to Use Metal Primers

Metal primers may not always be required on a project, but will always remain a recommendation to improve surface and substrate protection, as well as extend the lifespan of the topcoat or full system installation.

A metal primer’s primary job is to stop the metal from getting wet, or coming into direct contact with any form of moisture, damp or humidity. Whilst some metals contain anti-corrosive materials (such as the addition of zinc – which oxidises first, before the metal substrate does), without using a primer as an added precaution, over time the paint system will age and may decay or begin to deteriorate. When this happens, oxidation will begin, and can quickly lead to rust forming on the surface. Flaking and peeling paint on a surface is most commonly caused from a primer not being used. Stripping back topcoats from metal that has begun to peel can be a large and expensive task – colours may fade on larger surface areas over time, and simply treating and recoating smaller areas is not a ‘colour matching’ option.

Please note that not all metal primers are rust-inhibiting. Some provide other forms of surface protection and topcoat/system installation preparation. Red oxide primers are rust-inhibitive and should be used on ferrous metals to prevent rust and substrate surface oxidisation.