HPR5B is the standard Part B hardener for the HPR5 toughened epoxy system. When combined with HPR5A resin, it delivers exceptional peel strength — up to 30 times greater than conventional epoxies — making it ideal for shock-critical structural bonding of metals, composites, and mixed substrates.
Standard cure rate hardener for the HPR5 toughened epoxy system
Produces bonds with outstanding peel, impact, and thermal shock resistance
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 130G, 260G, 1.04KG, and 5.2KG sizes
For slower working time, see HPR5B (Slow). Refer to the HPR5 technical data sheet for mix ratios and cure schedules.
