Novol 35646 H5120 Fast Hardener (2.5L) – High-Capacity Activator for 2K Clearcoats
Accelerate your booth throughput with the Novol H5120 Fast Hardener. This 2.5-litre bulk unit is a high-performance chemical activator specifically engineered for use with Novol Novakryl 570, 580, and 590 High Solid (HS) clearcoats.
The "Fast" formulation is the professional choice for cooler workshop conditions (below 20°C) or for "SMART" repairs where a rapid curing cycle is required to move the vehicle to the next stage of assembly.
System Compatibility & Mixing
This hardener is designed for the standard 2:1 mixing ratio found in the Novakryl HS clearcoat range.
- The "Perfect Match": This 2.5L hardener is precisely sized to activate a 5.0 Litre tin of Novakryl clearcoat, resulting in 7.5 Litres of ready-to-spray material.
- Mixing Ratio: 2:1 (2 parts Clearcoat : 1 part Hardener).
- Speed Profile: Optimized for rapid cross-linking, reducing the "dust-free" and "tack-free" times significantly compared to standard H5110 hardeners.
Key Features & Benefits
- Rapid Initial Set: Reaches a dust-free state in approximately 15–20 minutes, minimizing the window for airborne contaminants to ruin the finish.
- Excellent Gloss Retention: Despite the faster cure, it is formulated to allow the clearcoat to level perfectly, maintaining a deep, glass-like shine without "die-back."
- Cold Weather Performance: Provides a reliable and consistent cure in environments where standard hardeners might struggle to react fully.
- High Chemical Stability: Ensures the clearcoat reaches its maximum hardness and UV resistance quickly, protecting the underlying basecoat.
- Bulk Value: The 2.5L container is the most cost-effective solution for high-volume body shops performing multiple full-vehicle resprays.
Expert Insight: Use H5120 Fast Hardener for vertical panels (doors/wings) to prevent runs, or when you are painting in a booth without a bake cycle. If you are painting a full roof or bonnet in temperatures above 23°C, you might prefer the Standard H5110 to allow the paint more time to flow out smoothly.
