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Moisture Tolerant Primers
Moisture-tolerant metal primers offer a dependable solution for painting in damp or humid conditions, where traditional coatings might fail. These advanced formulations are part of our wider selection of metal primers designed to deliver effective corrosion protection across challenging industrial and outdoor environments.
Hydron Nu-Steel TP Aluminium Primer
Nu-Steel TP Aluminium Primer is a high build epoxybased coating, part of the Nu-Steel TP System. For use on properly prepared steelwork. Excellent opacity giving good obliterating power prior to the application of Nu-Steel TP Finish, and excellent adhesion to clean, bright galvanised steel For use on properly prepared steel such as...
Sherwin-Williams Macropoxy M111
Sherwin-Williams Macropoxy M111 is a 2-pack epoxy zinc phosphate primer for application to surfaces which have been prepared by wet abrasive blasting. It may also be applied to grit blasted surfaces and for surfaces prepared by UHP water blasting where existing blast profile is exposed. Please note: This product is made to order subject to...
Sherwin-Williams Macropoxy C402V2
Sherwin-Williams Macropoxy C402V2 is a high build 2-pack epoxy zinc phosphate primer/buildcoat, which provides anti-corrosive protection of carbon steel surfaces prepared by abrasive blast cleaning. Network Rail endorsed Touch dry in up to 90 minutes at 23°C For use in internal/external exposed conditions, including offshore,...
Rust-Oleum 769/780 Damp-Proof Rust Primer
Available in a wide range of colours. Ideal for application on slightly damp or dry metal surfaces. Requires minimal surface preparation. Durable corrosion protection. Optimal rust inhibition. Certified for C4 exposure conditions (ISO 12944) and VOC compliant (375 g/l). Buy A Paint Colour Sample
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Moisture-Tolerant Metal Primers for Wet and Humid Environments
Moisture-tolerant metal primers are specialist coatings developed to protect steel and other metals when traditional primers can't be applied due to damp conditions. Whether it’s condensation, residual humidity, or dew on the substrate, these primers adhere securely and resist corrosion in environments where drying times or surface blasting aren’t practical. Perfect for infrastructure, offshore, or reactive maintenance, they form a strong foundation even on pitted or lightly rusted steel. Used alongside compatible metal paints, they ensure long-term durability where rust risk is high and time is limited.
These primers bond to ferrous and non-ferrous substrates, including aluminium, galvanised steel, and stainless steel, making them especially useful for balcony steelwork, tank exteriors, and architectural façades. In areas where moisture lingers and traditional primers would fail, they help improve adhesion and prevent delamination. For projects like warehouse shutters or exposed doors, these products also pair well with garage door paints to ensure a durable finish, even in constantly changing weather conditions. Surfaces should still be properly cleaned using metal cleaners to remove oils and salts before priming, ensuring reliable coating performance.
Moisture Tolerant Metal Primer FAQs
Can I apply moisture-tolerant primers to wet metal?
These primers are designed for damp - not soaking wet - surfaces. Remove visible water before application and apply while the metal remains slightly damp.
What metals can moisture-tolerant primers be used on?
They’re suitable for steel, aluminium, galvanised steel, and stainless steel. Always confirm compatibility based on the surface and exposure conditions.
Do I still need to clean the surface before priming?
Yes. Moisture-tolerant doesn't mean contaminant-tolerant - use appropriate metal cleaners to remove grease, oil, and debris for best adhesion.
Are these primers compatible with all topcoats?
Not all. Check product data sheets or consult with Rawlins’ technical team to ensure compatibility with your chosen topcoat or paint system.
How long will these primers last?
When correctly applied and overcoated, they can protect surfaces for up to 10 years—even in aggressive coastal or industrial environments. Regular inspection is recommended.