Novol H5520 Hardener (200ml) – Essential Activator for Protect 330 & 390
The Novol H5520 is the dedicated hardener (activator) required to cure Novol’s professional-grade acrylic primers. This 200ml unit (Product Code: 35821) is specifically formulated to work with Protect 330 and Protect 390 HS (High Solid) primers, ensuring the mixture reaches its full chemical resistance and structural stability.
Using the correct H5520 hardener is critical for achieving a surface that is easy to sand and provides a secure foundation for your final paint layers.
Key Features & Benefits
- Precision Compatibility: Engineered specifically for the Novol Protect 330 and 390 primer series.
- Optimal Chemical Reaction: Ensures complete cross-linking of the acrylic resins for a tough, durable finish.
- Standard Curing Profile: Provides a balanced drying time suitable for a wide range of workshop temperatures (20°C–25°C).
- High-Gloss Foundation: Helps the primer maintain its high-solid properties, preventing "sinkage" or "mapping" after the topcoat is applied.
- Compact 200ml Size: Perfectly measured for smaller primer tins, reducing waste and ensuring the hardener stays fresh.
Professional Mixing Advice
To achieve the best results, always use a mixing stick or a graduated mixing cup to ensure the ratio of primer to H5520 hardener is exact. Incorrect ratios can lead to a "soft" primer that is difficult to sand or, conversely, a brittle finish that may crack.
Pro Tip: Once the hardener is added to the primer, the "pot life" (working time) begins. Typically, you will have approximately 45 to 60 minutes to apply the product at 20°C before it begins to thicken in the spray gun.
