IMPA: 812211

Plastic Steel Marine-Grade Epoxy Putty

Our Plastic Steel marine-grade epoxy putty is a two-part metal repair compound that cures to a steel-hard, machinable material. Perfect for on-board repairs of hulls, decks, piping, and machinery. It bonds strongly to steel, aluminum, brass, wood, and more, creating a watertight seal that withstands harsh marine conditions.

This versatile putty can be used to fill cracks, patch holes, rebuild worn parts, and even seal leaks in engine compartments. It is resistant to salt water, fuels, lubricants, and most solvents, making it an essential item for any ship's maintenance locker.

With a working time of approximately 30 minutes, it allows for easy application and shaping. Full cure is reached within 24 hours at room temperature, after which it can be drilled, tapped, machined, and painted.

Key Features

Technical Specifications

SpecificationValue
Product TypeTwo-part epoxy putty
CoverageApprox. 15 in³ per pound
Working Time20–30 minutes at 70°F
Handling Cure1–2 hours
Full Cure24 hours (at 70°F)
Compressive Strength10,000 psi
Service Temperature-40°F to 250°F
ColorSteel gray
IMPA Code812211

Frequently Asked Questions

What is Plastic Steel used for?

Plastic Steel is a metal repair putty used to patch holes, fill cracks, rebuild worn parts, and seal leaks on ships. It cures to a hard, machinable material that can be drilled and tapped.

How do I apply it?

Cut off equal parts of the two compounds and knead them together thoroughly until a uniform color is formed. Apply within the working time to the cleaned surface, then allow to cure.

How long does it take to cure?

It typically sets within 1–2 hours and fully cures in 24 hours at room temperature. Curing accelerates at higher temperatures.

Is it resistant to saltwater?

Yes, once cured, this putty is highly resistant to saltwater, fuel, oils, and most chemicals, making it suitable for long-term marine exposure.

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