HPR5B Toughened Epoxy Hardener Part B (Slow)

HPR5B Slow is the extended pot-life Part B hardener for the HPR5 toughened epoxy system. When combined with HPR5A resin, it delivers the same exceptional peel and impact strength as standard HPR5B, but with a longer working time — ideal for large assemblies, complex bonding operations, or warm working environments.

• Slow cure rate — extended working time for large or complex assemblies
• Same outstanding peel, impact, and thermal shock resistance as standard HPR5B
• Room-temperature cure — no oven or press required
• Suitable for metal bonding, composite structures, and high-toughness castings
• Use with HPR5A resin at specified mix ratio
• Available in 1.30KG and 5KG sizes

For faster cure, see HPR5B (Standard). Refer to the HPR5 technical data sheet for mix ratios and cure schedules.