Novol 35836 Protect Hardener H5530 (1L) – High-Capacity Activator for Protect 333
The Novol H5530 is a professional-grade hardener specifically engineered for use with Novol Protect 333 acrylic primers. This 1-litre unit is the "Standard" speed variant, providing a balanced curing profile that ensures optimal flow, excellent chemical cross-linking, and a surface that is easy to block-sand once cured.
Using the dedicated H5530 hardener is essential to maintain the high-build characteristics and anti-corrosive integrity of the Protect 333 system.
Key Features & Benefits
- System-Specific Formulation: Optimized for the resin chemistry of Protect 333, ensuring a rock-hard finish that won't "sink" over time.
- Large Format Efficiency: The 1-litre size is ideal for full-vehicle resprays or high-volume workshop use, offering better value than smaller 200ml units.
- Balanced Drying Profile: Provides a consistent "pot life" (working time), allowing you to spray large panels or multiple parts without the primer thickening prematurely in the gun.
- Enhanced Sanding Properties: Works with the primer to create a crisp, dry-sanding surface that won't clog fine-grit abrasives.
- High Chemical Stability: Contributes to the overall solvent resistance of the primer layer, protecting the repair from "mapping" when the topcoat is applied.
Professional Mixing Strategy
Because hardeners contain isocyanates, they are sensitive to air and moisture. To ensure a perfect cure every time:
- Seal Immediately: Always replace the cap tightly after pouring to prevent the hardener from "skinning" or losing its potency.
- Mixing Order: Always mix the Primer and Hardener thoroughly before adding any acrylic thinner.
- Induction: While not strictly required for all acrylics, letting the mixture sit for 5 minutes before spraying can help stabilize the chemical reaction.
- The Ratio: If you are using the 1L hardener with a 4L or 5L tin of Protect 333, use a graduated mixing stick or a mixing cup to ensure the volumes are exact.
Pro Tip: If you are working in exceptionally cold conditions (below 15°C) or very hot conditions (above 30°C), Novol also offers "Fast" and "Slow" versions of this hardener. The H5530 Standard is the most versatile choice for year-round use in a controlled shop environment.
