Gurit AMPREG 31 Epoxy Resin and Hardener Kit

Gurit AMPREG™ 31 Epoxy Resin and AMPREG™ 3X Hardener Kit

Gurit AMPREG™ 31 is a two-component epoxy wet laminating system developed for the manufacture of large composite structures. The system is suitable for hand lay-up and vacuum bagging processes and is designed for composite laminate manufacturing.

The viscosity of AMPREG™ 31 resin is optimized to support effective wet-out of fiber reinforcements while maintaining resistance to drainage on vertical surfaces. These properties make the system suitable for laminating large composite components and structures with complex geometries.

The resin is used with a compatible AMPREG™ 3X hardener at a weight ratio of 100:26. The system supports ambient-temperature curing as well as elevated-temperature post-curing. Working time and curing characteristics depend on the selected hardener speed and application conditions.

Gurit AMPREG™ 31 is formulated with Light Reflective Technology (LRT). Under UV light, the resin exhibits fluorescence, helping identify resin contamination and unintended resin deposits during composite manufacturing.

Technical Specifications

Property	Value
Product type	Two-component epoxy laminating system
Resin model	AMPREG™ 31
Hardener	AMPREG™ 3X series
Mixing ratio	100:26 by weight
Resin colour	Yellow
Resin viscosity (25°C)	2,000–2,800 cP
Recommended application temperature	18–25°C
Minimum recommended mixing temperature	15°C
Minimum recommended curing temperature	18°C
Post-curing options	16 hours at 50°C or 5 hours at 70°C

Application Methods

• Hand lay-up
• Vacuum bagging

Key Features

• Optimized viscosity to support fiber wet-out.
• Resistance to drainage on vertical surfaces.
• Suitable for hand lay-up and vacuum bagging.
• Ambient-temperature curing capability.
• Elevated-temperature post-curing options.
• Gurit LRT technology helps detect resin contamination under UV light.

Application Instructions

1. Measure the resin and hardener at a weight ratio of 100:26.
2. Ensure the mixing environment is at least 15°C. The recommended application temperature is 18–25°C.
3. Mix the resin and hardener thoroughly for at least two minutes.
4. Ensure that the sides and bottom of the mixing container are properly scraped and mixed.
5. Apply the mixture to the fiber reinforcement using a foam roller or brush.
6. Carry out curing according to the manufacturer's specified temperature and time conditions.

Storage and Safety

• Store the resin and hardener separately in their original containers.
• Maintain storage temperatures between 10°C and 25°C.
• Protect from direct sunlight, moisture and freezing conditions.
• Follow the specified mixing ratio. Incorrect proportions may adversely affect cured properties.
• The chemical reaction begins after mixing and generates heat.
• Consult the SDS and TDS documents for both components before use.

Package Contents

• Gurit AMPREG™ 31 Epoxy Resin
• Compatible AMPREG™ 3X Hardener