Primers & Undercoats

Rawlins Paints stock an excellent range of high-quality marine grade primers and undercoats for use on a range of surfaces including metal, wood and fibreglass prior to the application of the selected topcoat. Primers and undercoats improve coating adhesion to a surface or substrate, coverage rates and the overall durability of the system. We offer primers and undercoats for surface areas above and below the waterline – please note the importance of choosing the right product to ensure longevity of your subsequent coats of paint. If you have any questions regarding primer, undercoat and topcoat compatibility in a full system installation, contact Rawlins Paints’ Technical Support Team.

With corrosion potentially costing the marine industry millions of pounds per year, effective corrosion control measures, including the correct choice of a primer or undercoat as part of a maintenance system, should be very carefully considered.

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Teamac Marine Primer Undercoat

Teamac Marine Primer Undercoat, is an interior and exterior, oil based marine undercoat. It is a high opacity undercoat with good flow characteristics for use with Teamac Marine Gloss.  It has been designed to reduce topcoat sinkage and to retain a high gloss finish. Primes and prepares - easy to use Protects and enhances –...

Price £19.27 (ex. VAT)
In Stock and Available for Delivery

Teamac Metaclor Antifouling Primer

Teamac Metaclor Antifouling Primer is a strong, versatile, chlorinated rubber based coating for Wood, Metal & GRP.  Suitable for Narrowboats, Cruisers, Barges, Yachts and Marine Applications.  Can be used above and below the waterline, on mixed material surfaces and over any existing antifouling. Versatile Primer for Antifoulings Use...

Price £21.57 (ex. VAT)
In Stock and Available for Delivery

Teamac Duracote Red Oxide Paint

Teamac Duracote Red Oxide Paint, is a general purpose primer and finish in one. Teamac Duracote Red Oxide Paint can be used coat on coat direct on to metal and can be used indoors or outdoors and is a very good protector of metals. All round metal protector Use indoor or outdoor Self overcoatable For greater protection apply over Teamac...

Price £18.08 (ex. VAT)
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Jotun Vinyguard Silvergrey 88

Jotun Vinyguard Silvergrey 88 is a one component physically drying vinyl coating that is fast drying and can be used as primer or mid coat in atmospheric and immersed environments. Suitable for properly prepared carbon steel substrates. Recommended for topside, deck and superstructure or as a tie coat for anti-fouling systems in the marine...

Price £45.08 (ex. VAT)
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Jotun Safeguard Universal ES

Jotun Safeguard Universal ES is a two component polyamide cured vinyl epoxy based coating. Specially designed as a tie coat between epoxy primers and antifouling systems but can be used as tie coat for a wide range of topcoats. To be used as tie coat in atmospheric and immersed environments. Coverage Calculator More Information Delivery Info

Price £162.00 (ex. VAT)
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International Intershield 300

With a proven 21 years` track record on over 8,700 projects, International Intershield 300 is the offshore industry benchmark in anti-corrosive performance. This unique abrasion resistant, pure epoxy coating, with an aluminium content >9%, offers long term asset protection to offshore structures Unparalleled long term corrosion and...

Price £509.06 (ex. VAT)
In Stock and Available for Delivery

Sherwin-Williams Kem-Kromik 671

Ken-Kromik 671 (formerly known as Sherwin-Williams M671 and as Leighs M671) is a high quality undercoat/tiecoat developed for marine use on above waterline areas but also suitable for normal interior and exterior use. It is a single component, conventional quick drying undercoat/tiecoat. Ken-Kromik 671 may also be used as a wood primer for...

Price £73.54 (ex. VAT)
In Stock and Available for Delivery

Carboline Carboguard 690 GF

Carboline Carboguard 690 GF is a glass-flake filled, cold cure epoxy having excellent film strength and resistance to water, salt water and wastewater exposures. Can be used on a variety of surfaces including structural steel, piping, pilings, ships, offshore structures, and other equipment exposed to industrial or marine environments....

Price £258.75 (ex. VAT)
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Carboline Carboguard 890 GF

Carboline Carboguard 890 GF is a glass reinforced chemically resistant epoxy coating with wide versatility in all industrial markets, including marine applications. Surface tolerant characteristics for less severe applications Low-temperature version: 890 LT GF Self-priming and primer/finish capabilities Excellent abrasion to...

Price £110.25 (ex. VAT)
In Stock and Available for Delivery

Carboline Carbomastic 18 FC

Carboline Carbomastic 18 FC is a two-component, fast-curing, heavy-duty, high-build anti-corrosive epoxy coating with a broad and versatile list of uses in marine and other corrosive environments. Excellent immersion performance in both fresh and sea water Suitable as a rust preventive coating in ballast tanks and hull applications...

Price £91.50 (ex. VAT)
In Stock and Available for Delivery

PPG SigmaShield 1200

PPG SigmaShield 1200 is a two-component, abrasion-resistant, solvent-free, amine-cured phenolic epoxy coating. This single coat system is designed for under water hull of ice going and ice breaking vessels and is recognised by Lloyd`s register as an abrasion resistant ice coating. Excellent resistance to crude oil up to 120°C (250°F)...

Price £759.80 (ex. VAT)
In Stock and Available for Delivery

PPG Sigma EP 111 Primer

PPG Sigma EP 111 Primer, a two-component general-purpose epoxy primer or buildcoat in protective coating systems, for steel and concrete structures in atmospheric exposure. The high solids polyamide cured recoatable zinc phosphate epoxy primer can be recoated with various two-component and conventional coatings, even after long weathering...

Price £377.18 (ex. VAT)
In Stock and Available for Delivery

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Marine primers and undercoats can protect submerged areas of vessels including newbuilds, ships, yachts, boats, narrowboats, canal boats along with offshore structures, providing resistance against:

  • Salt water
  • Temperature changes
  • Reinforcement against impact damage and abrasion
  • Rust, corrosion and substrate oxidisation
  • Pitting and bacterial corrosion
  • Colour loss

Mild steel, for example, corrodes easily in saltwater, and unless it is adequately protected and reinforced with a primer or undercoat along with a topcoat, it can rapidly lose its strength – which may result in structural failure.

Corrosion is caused by the spontaneous reaction between a material and its environment – salt or freshwater submersion, for example, or docklands and related areas of heavy wave impact – which results in the degradation of the material. In metals, this can result in the deterioration of the mechanical properties of the metal.

Marine primers and undercoats are a core part of a full system installation to tackle, treat and prevent corrosive damage to a structure from fouling. They can greatly improve the lifespan of a structure, the mechanical integrity of a surface material, and improve colour retention on aesthetically proud areas.

Marine fouling is the term generally used to describe the corrosive settlement and growth of marine plants and animals on submerged structures. There are specialist anti-fouling coatings available which target this specific form of surface and substrate damage. Offshore structures around the UK coastline typically include:

  • Ships’ hulls
  • Piers
  • Piling
  • Oil rigs
  • Offshore wind turbines

Along with the internals of pipework used to carry water as a coolant for industrial power plants.

On ships hulls, fouling type, extent and severity depends upon many factors - water salinity, light, temperature, pollution and nutrient availability. The severity of fouling tends to be a seasonal phenomenon governed by geographical location.

Corrosion, and the rate at which corrosion occurs in seawater for example is dependent upon many factors, including oxygen concentration, pH (acidity/alkalinity), water temperature and the presence of dissolved salts such as chloride, sulphate, and sulphites. 

Corrosion attacks also occur in oil tanks, ballast tanks and cargo pipework, all of which can be protected with a basecoat or primer from International, Jotun, Sherwin-Williams, or Teamac, as part of their full system ranges for metal.

Corrosion Prevention

Proper surface preparation prior to the application of a primer or undercoat is essential for the success of any marine coating system. The importance of removing oil, grease, old coatings and surface contaminants (such as millscale and rust on steel, and zinc salts on zinc containing primers or galvanised surfaces) cannot be over emphasised.

The performance of any primer or paint coating is directly dependent upon the correct and thorough preparation of the surface prior to coating. The most expensive and technologically advanced coating system will fail if the surface preparation is incorrect or incomplete.

The main objective of surface preparation is to ensure that all such contamination is removed to reduce the possibility of initiating corrosion and to create a surface profile that allows satisfactory adhesion of the coating to be applied.

Marine Primers and Subsequent Coatings

The effectiveness of all coatings applied – including primers and undercoats - in preventing corrosion depends upon many factors, for example, coating type, end use and operating environment.

Coatings in service - cargo hold coatings, deck coatings and hull coatings - will be subjected to mechanical damage. Corrosion protection can therefore best be achieved by using a primer or undercoat that strengthens the mechanics of a full marine coating system.