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.

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

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.

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

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.

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.