MR. JO JH 8380 – Balanced Phenalkamine for Performance & Versatility
MR. JO JH 8380 – Balanced Phenalkamine for Performance & Versatility
When projects demand not just fast reactivity but also balanced working time and excellent long-term performance, JH 8380 becomes the applicator’s go-to choice. Designed as a phenalkamine curing agent comparable to GX5368, it offers the best of both worlds — reliable cold-weather curing with user-friendly handling on site.
What is JH 8380?
JH 8380 is a medium-to-high reactivity phenalkamine designed for coatings, flooring, and repair applications where pot life, adhesion, and moisture tolerance need to be finely balanced. Unlike ultra-fast hardeners that limit working time, 8380 gives applicators enough application window while still ensuring quick return-to-service — a true performance-oriented curing agent.
Technical Profile
- Amine Value (mg KOH/g): 340–370
- Viscosity @ 25 °C: 2,100–2,600 mPa·s
- Color (Gardner): ≤14
- Density @ 25 °C: 0.93–0.97 g/cc
- Mix Ratio (phr with Bis-A epoxy resin): 50–55
- Pot Life (100 g @ 25 °C): ~35–40 minutes
- Tack-Free Time: ~6–7 hours (thin film)
- Hardness (Shore D): 78–82 after cure
This profile makes JH 8380 a robust and flexible hardener that balances productivity on site with reliable curing performance.
Applications
- Epoxy flooring – ideal for self-leveling and screed systems, especially in humid environments.
- Industrial coatings – bridges, refineries, and marine steel structures.
- Repair mortars & grouts – strong adhesion to damp concrete for structural repairs.
- Protective linings – chemical-resistant coatings for tanks and processing plants.
Why Choose JH 8380?
- Balanced Reactivity – gives applicators more working time compared to ultra-fast phenalkamines.
- Cold & Damp Surface Tolerance – cures reliably in real-world site conditions.
- High Strength Development – reaches excellent hardness and durability.
- Versatility – works across coatings, flooring, and repair applications.
The Bottom Line
JH 8380 is the right choice when you need reliability, versatility, and balanced reactivity. It delivers on performance in flooring, coatings, and repair jobs — making it the preferred workhorse phenalkamine for applicators who need one hardener that does it all.
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