Novol 35626 H5110 Fast Hardener (2.5L) – Specialized Activator for Novakryl 520
The Novol H5110 Fast Hardener is the dedicated chemical partner for Novol Novakryl 520 clearcoat. This 2.5-litre unit is specifically formulated to provide a rapid cure and high-gloss stability. As a "Fast" version, it is the professional's choice for cooler environments or when you need to minimize the "tack-free" time to get the vehicle out of the booth and into assembly.
While some hardeners are universal, the H5110 is chemically optimized for the specific resin structure of the 520 series, ensuring the clearcoat reaches its maximum hardness and UV resistance without becoming brittle.
The Perfect Mix: 2:1 Ratio
This hardener is designed to work with the standard High Solid (HS) mixing requirements.
- The "Perfect Match": This 2.5L tin is the exact volume needed to activate a 5.0 Litre tin of Novakryl 520.
- Mixing Ratio: 2:1 (2 parts Clearcoat : 1 part Hardener).
- Yield: Mixing the full 2.5L of hardener with 5L of clearcoat results in 7.5 Litres of ready-to-spray material.
Key Features & Benefits
- Accelerated Drying: Significantly reduces the "Dust-Free" time, making it ideal for workshops without high-end filtration where airborne dust is a concern.
- Brilliant Clarity: Formulated to prevent "clouding" during the fast evaporation phase, ensuring the clearcoat remains crystal clear over metallic and pearl basecoats.
- Low Temperature Reliability: Designed to perform consistently in standard workshop temperatures (15°C – 20°C) where standard-speed hardeners might stay "soft" for too long.
- High Chemical Cross-linking: Despite the speed, it ensures a dense molecular bond that resists stone chips, bird droppings, and fuel spills.
- Bulk Shop Value: The 2.5L size is the most economical choice for high-volume refinishing centers.
Professional Application Strategy
Because this is a Fast hardener, timing and environment are everything:
- Pot Life Warning: Once mixed, the chemical reaction begins immediately. Do not leave the mixture in your spray gun for more than 30 minutes, or it will begin to "gel" and ruin your finish.
- Agitation: Always stir the clearcoat and hardener together thoroughly for at least 60 seconds before pouring into the spray gun.
- Flash-off: Even with a fast hardener, you must allow 5–10 minutes between coats. If you spray the second coat too soon, you risk trapping solvents which causes "pinholing" or "die-back" (loss of gloss).
- Storage: Keep the tin tightly sealed. Fast hardeners are extremely sensitive to humidity; moisture in the air can cause the liquid to crystallize inside the tin.
Expert Insight: If you are painting a very large surface (like a full van) in a warm booth, the H5110 Fast might dry too quickly, leading to "dry spray" where the paint doesn't flow together. In those specific cases, the Standard H5110 would be a safer bet to maintain a wet edge.
