Choosing the Right MR. JO Phenalkamine Hardener – A Practical Guide
Choosing the Right MR. JO Phenalkamine Hardener – A Practical Guide
When it comes to epoxy curing agents for real-world projects, few options offer the versatility and reliability of phenalkamines. Their ability to cure in cold, damp, or even high-humidity conditions makes them indispensable for flooring, coatings, and civil applications.
At JPOXY, we offer a complete range of Phenalkamine Hardeners in user-friendly project packs, ensuring contractors and applicators can access exactly what they need, without the burden of bulk-only supply. But with six different grades available, which one should you choose? Let’s break it down.
The MR. JO Phenalkamine Range at a Glance
| Product | Comparable Grade | Amine Value (mg KOH/g) | Viscosity (mPa·s @25 °C) | Phr (Bis-A resin) | Best For |
| JH 8361 | NC541 | 300–335 | 25,000–50,000 | 50–55 | Ultra-strong adhesion, primers, damp substrates |
| JH 8362 | NC541LV | 320–345 | 1,500–3,000 | 50–55 | Easier handling vs 8361, floor coatings, damp cure |
| JH 8378 | NC558 | 320–360 | 500–1,500 | 50–55 | Fast cure, repair mortars, quick return-to-service |
| JH 8379 | NX5198 | 270–320 | 80–200 | 45–50 | Low-viscosity injection & crack repair, easy mixing |
| JH 8363 | NC540i | 390–420 | 1,800–2,200 | 40–45 | High chemical resistance, protective coatings |
| JH 8380 | GX5368 | 340–370 | 2,100–2,600 | 50–55 | Balanced reactivity, versatile flooring & coatings |
How to Select the Right Grade
- For Primers & Damp Surfaces → Choose JH 8361 if maximum adhesion is your priority, or JH 8362 for easier handling with similar performance.
- For Fast Repairs → JH 8378 gets the job done quickly, making it ideal for patching, grouts, and mortars where downtime is minimal.
- For Injection & Low-Viscosity Applications → JH 8379 flows easily, making it perfect for crack injection or sealing.
- For Harsh Chemical Environments → JH 8363 delivers superior chemical resistance for tanks, marine coatings, and industrial linings.
- For All-Round Flooring & Coatings → JH8380 strikes the best balance between working time and reactivity, making it a versatile workhorse.
The MR. JO Advantage
- Available in small & project-friendly packs – unlike many global suppliers (Cardolite, Kukdo, Admark, etc.), we make phenalkamines accessible for applicators.
- Tailored formulations – optimized for Indian site conditions.
- One-stop selection – whether you need fast cure, low viscosity, or chemical resistance, there’s a MR. JO hardener designed for it.
In Summary
Choosing the right phenalkamine hardener doesn’t have to be complex. With MR. JO Phenalkamine Hardeners, you get a clear, structured range that allows you to pick exactly what your project demands — without overstocking or compromising on performance.
From JH 8361 for strong primers to JH 8380 as the all-rounder, every grade is designed to give applicators the Strength to Bond – Power to Protect.
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