The Novol N90041 Classic Epoxy Hardener is a high-quality activator specifically designed for use with smaller quantities of Novol Classic Epoxy Primer. This 340ml unit is the essential chemical partner required to trigger the cross-linking process, turning the liquid epoxy resin into a rock-hard, non-porous, and anti-corrosive shield.
When mixed at the precise 3:1 ratio, it ensures your primer achieves its maximum laboratory-tested adhesion and moisture-exclusion properties.
Key Features & Benefits
- Small-Batch Precision: The 340ml volume is perfectly measured to pair with a 1-Litre tin of Novol Classic Epoxy Primer, ensuring you have exactly the right amount for a complete 1.34L mixing kit with zero waste.
- Deep Chemical Cure: Ensures the epoxy primer cures evenly through the entire film thickness, preventing "skinning" or soft spots that can lead to delamination.
- Maximum Corrosion Resistance: Activates the specific anti-corrosive inhibitors in the epoxy resin, creating a permanent barrier against water, salt, and oxygen.
- Exceptional Adhesion Support: Helps the primer bond aggressively to challenging substrates like bare steel, aluminum, and galvanized surfaces.
- Long Shelf Life: Packaged in a high-quality, airtight tin to prevent moisture contamination (isocyanate/epoxy activators are sensitive to humidity once opened).
Application & Mixing Guidelines
- The 3:1 Rule: Use the Novol N39699 (2:1 / 3:1) Measuring Stick. Epoxy systems are unforgiving with "eyeballed" ratios; too much or too little hardener will compromise the rust-proofing.
- Induction Time: After mixing the hardener into the primer, stir thoroughly and let the mixture sit for 10–15 minutes before spraying. This "induction period" is critical for epoxy chemistry to stabilize.
- Thinning: If you need to thin the mixture for a smoother finish or "wet-on-wet" application, only add Novol N65521 Epoxy Thinner after you have mixed the primer and hardener.
- Temperature Warning: Do not use epoxy products if the ambient or metal temperature is below 15°C, as the chemical reaction may stall, resulting in a failed coating.
Why Choose the N90041 Hardener?
If you are performing a spot repair or restoration on a single panel (like a wing or door), a 1-litre hardener is often too much. The N90041 340ml size allows you to keep your chemicals fresh. Since epoxy hardeners can degrade once exposed to air, buying the smaller size for smaller jobs ensures every drop you use is at peak potency for maximum rust protection.
