Novol N-Range Hard 90-850 Standard Hardener – 500ml
The Novol 90-850 is a professional-grade activator specifically engineered for use with the N-Range Dart Clear 8500 (N91093). This 500ml unit is the critical chemical catalyst required to trigger the "Dart" high-speed air-drying technology.
Designed for a precise 2:1 mixing ratio, this hardener ensures that the clearcoat reaches its maximum structural hardness and mirror-like gloss at ambient workshop temperatures, eliminating the need for expensive oven baking.
Key Features & Benefits
- Synergistic Rapid-Dry Chemistry: Tailored specifically to the resins in Dart Clear 8500, allowing the finish to reach polishing hardness in as little as 60–90 minutes at 20°C.
- Crystal Clarity: Formulated with high-purity solvents to ensure the mixture remains water-white, preserving the true depth and "pop" of metallic and pearl basecoats.
- High Gloss Stability: Supports the clearcoat in maintaining its "wet-look" depth during the rapid drying phase, preventing the surface from "dying back" or hazing.
- Optimal 2:1 Ratio: This 500ml bottle is perfectly measured to activate a 1.0-litre tin of Dart Clear, creating a convenient 1.5-litre ready-to-spray kit.
- Superior UV Resistance: Once cross-linked, it provides the clearcoat with excellent protection against yellowing and environmental degradation.
Professional Mixing & Handling
- The 2:1 Rule: Use a Novol N-Range 2:1 Measuring Stick. High-solids (HS) air-dry 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 90-850 to the clearcoat, stir thoroughly for at least 60 seconds, ensuring the mixture is completely homogeneous before pouring into the spray gun.
- Short Pot Life: Note the shorter pot life of approximately 1 hour. Only mix what you can use immediately. Do not leave this mixture sitting in your spray gun during a break.
- 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.
- Environmental Note: Ensure your workshop has good air circulation. As a rapid air-dry product, it relies on the evaporation of solvents to trigger the hardening process.
Why Is the 90-850 Hardener Essential?
The Dart Clear 8500 system is designed to save you time and energy costs. However, that benefit is only possible with the 90-850 catalyst. Using a standard hardener from a different line will result in significantly slower drying times and may compromise the final gloss and durability. By using this dedicated hardener, you guarantee that your paintwork is "dust-free" in minutes and ready for the next stage of the project.
