Novol N91437 Novakryl H5160 Standard Hardener - 2.5 Litre
The Novol N91437 Novakryl H5160 is a professional-grade, high-solids (HS) activator specifically engineered for use with the Novakryl 560 Air-Dry Clearcoat (N91436). This 2.5-litre unit is the essential chemical component required to trigger the rapid air-drying technology of the Novakryl series, ensuring a factory-standard finish without the need for oven baking.
Formulated for a precise 2:1 mixing ratio, this hardener ensures that the clearcoat reaches its maximum structural hardness, UV resistance, and "mirror" gloss at ambient workshop temperatures.
Key Features & Benefits
- Synergistic Air-Dry Chemistry: Tailored specifically to the resins in Novakryl 560, allowing the clearcoat to reach polishing hardness in just 90-120 minutes at 20°C.
- High-Volume Efficiency: The 2.5-litre size is perfectly measured to activate a 5-litre drum of Novakryl 560, creating a massive 7.5 litres of ready-to-spray premium clearcoat.
- Crystal Clarity & Transparency: High-purity solvents prevent the mixture from "yellowing" or clouding, ensuring the basecoat's color and metallic flake remain vibrant.
- Balanced Flash-off: Provides enough "open time" for the clearcoat to flow out smoothly (reducing orange peel) while still maintaining its ultra-fast through-cure properties.
- Climate Stability: Designed for standard workshop conditions (18°C - 22°C), offering a predictable and reliable curing cycle.
- Long-Term Durability: Once cross-linked, it provides the clearcoat with superior resistance to bird droppings, fuel spills, and mechanical scratches.
Professional Mixing & Application Tips
- The 2:1 Rule: Use a Novol 2:1 Measuring Stick. High-solids (HS) systems are chemically sensitive; an incorrect ratio can result in a finish that remains "soft" or loses its gloss over time.
- Stirring: After adding the H5160 to the clearcoat, stir thoroughly for at least 60 seconds, ensuring the mixture is completely homogeneous before pouring into the spray gun.
- No Substitute: Do not attempt to use standard 2K hardeners with Novakryl 560. The air-drying technology relies entirely on the specific catalyst found in the H5160.
- Humidity Awareness: Because this system reacts with air to dry, very high humidity can accelerate the skinning process. Ensure your spray area is well-ventilated but not damp.
- Airtight Storage: Hardener is highly moisture-sensitive. Always replace the cap immediately after pouring to prevent the product from "seeding" or hardening inside the tin.
Why Is the H5160 Hardener Essential?
The Novakryl 560 system is designed to save you money on energy costs by eliminating the spray booth's "bake" cycle. However, that benefit is only possible with the H5160 catalyst. By using this dedicated hardener, you guarantee that your paintwork is "dust-free" in minutes and ready for the next stage of the project while the shop is still at room temperature.
