Marine-Grade Paint Now Available Across Strongdor Steel Door Range

Strongdor has introduced a marine-grade paint finish engineered to protect steel doors in harsh environmental conditions, such as coastal, marine, and heavy industrial settings. This coating is designed to resist corrosion, minimise surface degradation, and extend the lifespan of door sets installed in aggressive atmospheres.

Engineered for Coastal and Industrial Use

Strongdor’s marine-grade coating is developed for demanding conditions where exposure to salt, humidity, or chemicals can accelerate corrosion and compromise performance.

Protection Benefits

• Withstands prolonged exposure to salt spray
• Resists rust, surface pitting, and discolouration
• Offers high UV stability and weather resistance
• Minimises lifecycle maintenance in external applications

By applying the coating during manufacture, Strongdor ensures consistency, coverage, and long-term protection across all exposed steel components.

Backed by a 3-Year Extended Warranty

Each marine-grade door is covered by a 3-year no-quibble warranty, providing assurance for specifiers, contractors, and end users. The warranty is easy to activate:

How to Activate

• Scan the QR code on the door at delivery.
• Register the door online for warranty coverage.
• Access full care and maintenance resources as needed.

For full terms, visit our Door Care & Maintenance page.

Over 150 Colour Options, No Compromise on Aesthetics

Strongdor’s marine-grade finish is available in over 150 standard RAL colours, ensuring both design flexibility and long-term durability.
Whether blending with building façades or complying with branding requirements, this finish provides a clean, uniform appearance without compromising protective performance.

View finish options on our Steel Door Finishes resource page.

Available Across All Strongdor Door Sets

The marine-grade coating is now available as an option across Strongdor’s full product range: 

Compatible Door Types

• External Steel Doors
• Security Doors
• Fire Rated Doors
• Acoustic Doors

This ensures a consistent finish and corrosion protection for projects requiring multiple door types.

Specify with Confidence

For projects in marine zones, exposed coastal locations, or high-wear industrial areas, Strongdor’s marine-grade finish provides tested, warrantied protection* built for long-term performance.

To discuss your project requirements or add the marine-grade option to your next order, Request a Quote or call 01524 727000.

*terms and conditions apply