Epoxypro EPH-220B Slow Cure Hardener 3:1

EpoxyPro EPH-220B

Deep-Cure 3:1 Hardener, Low Exotherm, Structural & Deep Casting Grade

EpoxyPro EPH-220B is a slow reacting 3:1 epoxy hardener engineered for deep sections, large casting volumes, transom rebuilds, structural grouting and heavy-duty industrial repairs.
When combined with EPR-100A, EPR-110A or EPR-150A resin, EPH-220B provides a controlled, low-heat curing profile designed for thick pours, high-mass fills and structural applications where dimensional stability and low shrinkage are critical.

EPH-220B’s extended pot life and reduced exotherm make it ideal for applications that would overheat, crack or distort with standard hardeners.

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KEY FEATURES

3:1 mix ratio with EPR-100A, EPR-110A or EPR-150A

Very low exotherm, safe for deep pours and large volumes

Long pot life for complex assemblies and large repairs

Low shrinkage and high dimensional stability

High compressive strength after full cure

Excellent adhesion to concrete, steel, timber and composites

Ideal for structural fills and thick casting applications

Smooth, even cure across large cross-sections

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TYPICAL APPLICATIONS

Marine & Structural

Transom rebuilds

Stringer replacement

Bulk fill in composite hulls

Structural bonding of heavy sections

Void and cavity filling in boats or FRP structures

Industrial & Civil

Grouting pockets and anchor blocks

Steel plate bedding

Machine base repairs

Heavy structural casting

Large mass stabilisation

Concrete & Flooring

Deep crack injection fills

Mortar replacement

Deep bedding repairs

Large-volume floor patching

Casting Applications

Deep casting blocks

Industrial tooling shapes

Thick decorative castings

Slow-cure colour and clear pours

EPH-220B is the preferred choice wherever depth, mass or structural thickness exceed the safe limits of standard 2:1 system.

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TECHNICAL PERFORMANCE

Mix Ratio:

3:1 by volume (EPR-100A/EPR-110A/EPR-150A: - EPH-220B)

Pot Life:

7–9 hours at 25°C
Allows safe large volumes without runaway heat.

Viscosity:

5–15 mPa @ 25°C
Almost water-thin — exceptional flow and penetration.

Cure Behaviour:

Very slow, controlled gel time

Excellent thermal stability

Low peak temperature even in large masses

Minimal shrinkage

High final crosslink density

Long open time allows repositioning and complex assemblies

Mechanical Properties:

High compressive strength after full cure

Strong adhesion to steel, concrete, timber and composites

Excellent dimensional accuracy in thick sections

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APPEARANCE

EPH-220B is a low-colour, slow-reacting hardener that cures to a smooth, high-strength finish with minimal heat distortion.
Suitable for Clear, White, Black and Grey UNI-SYSTEM™ resin blends.

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EPH-220B Controlled. Strong. Deep-Cure Engineering.

Designed for builders, fabricators, marine repairers and industrial professionals who need a slow, stable, structural-grade cure capable of handling high-volume pours, transom rebuilds and deep infills without overheating or compromising strength.