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Immersed Environment Primers
Immersed environment metal primers are designed to protect steel and alloy surfaces that are constantly exposed to water or aggressive chemicals, such as in marine or industrial settings. These primers form the critical first layer in high-performance metal paint systems built for long-term durability below the waterline.
International Intergard 269
International Intergard 269 is a quick drying two component epoxy primer suitable for overcoating after prolonged periods of weathering, for use at both new construction and maintenance. As a blast holding primer suitable for use in immersed and exposed conditions and overcoatable with a wide range of high performance systems. For use at...
Jotun Penguard Primer
Jotun Penguard Primer is a two component polyamide cured high molecular weight epoxy coating designed as a primer for new construction. It can be used as a primer as a part of a complete system in atmospheric and immersed environments. Suitable for properly prepared carbon steel, stainless steel, aluminium, concrete, galvanised steel, shop...
Teamac Metaclor Underwater Primer
Matt grey modified chlorinated rubber primer. For multi-purpose use on steel, wood, and GRP. Can be applied underwater on prepared steel or as a sealer coat. Includes Zinc Phosphate for enhanced protection.
Rust-Oleum 9180 Epoxy Metal Primer
High-build two-component anti-corrosion primer available in Grey. For bare or blasted steel, galvanized substrates, and as an intermediate coat. High amount of rust inhibitors for enhanced protection. 1:1 mixing ratio. Touch dry in just 1 hour. Applied by brush, roller, or spray.
Tikkurila Temacoat SPA Primer
Tikkurila Temacoat SPA Primer, a two-component resin modified epoxy primer with anti-corrosive pigments with excellent adhesion to steel, zinc and aluminium surfaces, that can be applied in thick layers, thus enabling faster production. Has high solids content Used as a primer or an intermediate coat in paint systems exposed to abrasion...
PPG SigmaCover 295
Low-sheen red-brown epoxy primer. Good adhesion to steel and galvanized steel, industrial and marine applications. Suitable for touching up of weld seams and damages of epoxy coatings during construction. Can be overcoated with most alkyd-, chlorinated rubber-, vinyl-, epoxy- and two-component polyurethane coatings. Suitable on wet blast...
Jotun Jotacote F60 6A
A pure epoxy outfitting primer, suitable for use on a wide range of metal substrates as a primer, midcoat or finish coat in both atmospheric and immersed environments. Can be applied to carbon steel, stainless steel, galvanised steel, aluminium, GRP and thermally sprayed zinc Suitable temperature range from -196°C to +210°C Please note:...
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Durable Primers for Submerged Steel, Galvanised and Alloy Surfaces
Immersed environment primers are specialist coatings developed for use on metal structures in continuous contact with water or chemical solutions. These primers are often applied to steel used in docks, bridge supports, submerged tanks, and pipelines, providing the first layer of defence against aggressive corrosion. Available in epoxy and chlorinated rubber formulations, they are designed to prevent moisture, oxygen, and contaminants from degrading the substrate beneath. Their high chemical resistance and strong adhesion make them ideal for demanding sectors such as marine, wastewater, and oil and gas. Many systems also meet strict standards for water treatment, with some products suitable for use in potable water tanks.
These primers are frequently specified beneath stainless steel paint to protect high-performance alloys in chloride-heavy environments, or under galvanised steel paint where intercoat adhesion is critical. They also serve as a reliable base for aluminium paint systems in marine and chemical applications. These coatings can be brush, roller, or spray applied and are available in both single- and two-pack formats, with recoating times ranging from four to 24 hours. For submerged or splash-zone steelwork, these primers provide long-term protection against rust, pitting, and chemical attack when surface preparation and system compatibility are properly managed.
Immersed Environment Metal Primer FAQs
Can these primers be applied to damp metal?
Yes, many immersed primers tolerate marginally damp surfaces, but standing water and contaminants must be removed. Always confirm product suitability in the technical datasheet.
Are they compatible with stainless steel?
Yes. Stainless steel may still corrode in submerged or high-moisture conditions, and these primers ensure strong adhesion and corrosion control when applied correctly.
Do these primers resist chemicals as well as water?
Absolutely. Immersed primers are formulated to withstand a wide range of chemicals, including acids, solvents, and hydrocarbons, making them suitable for tanks, process equipment, and offshore platforms.
Are they suitable for potable water contact?
Only if the product has WRAS, NSF, or similar certification. Always check the datasheet before using in drinking water tanks or systems.
What surface preparation is required?
For steel, abrasive blasting to Sa 2.5 is usually necessary. Stainless steel and aluminium may require grinding or mechanical abrasion to ensure proper adhesion.