Dulux Avista High Solids Epoxy Part B Hardener 4L — Heavy-Duty Internal Floor Coating

The Dulux Avista High Solids Epoxy Part B Hardener is the hardener component of a premium two-part, high-solids epoxy system designed for heavy-duty internal concrete floors. When combined with High Solids Epoxy Part A Resin (6L, sold separately), it initiates a rapid chemical cure that produces an exceptionally hard, chemical-resistant floor coating trusted in commercial kitchens, industrial workshops, and high-traffic retail environments.

This 4-litre hardener is precisely formulated to match the 6L Part A Resin — together they form a complete 10L kit with approximately 100 m² coverage per coat. The high-solids chemistry means more active material reaches the floor and less evaporates, delivering superior film build and protection per coat.

Important: This is Part B of a two-part system. You must also purchase Dulux Avista High Solids Epoxy Part A Resin (6L). Mix ratio: 1000 mL Part A to 650 mL Part B by volume. Pot life is only 25 minutes — plan your application carefully.

Key Features & Benefits

• Rapid Chemical Cure: Initiates fast cross-linking for a dust-free surface in ~8 hours and full cure in 10–12 hours.
• Complete Kit Match: 4L of hardener is the exact amount required for the 6L Part A Resin — no measuring needed for full-kit mixing.
• Exceptional Hardness: Produces a coating far harder and more durable than single-pack or waterbased alternatives.
• 5-Year Shelf Life: Excellent storage stability in original unopened packaging.

Application Notes

Add the entire contents of Part B (4L) to Part A (6L) for a full 10L kit, or measure smaller quantities at the ratio of 650 mL Part B per 1000 mL Part A. Mix thoroughly for 2–3 minutes. Apply immediately — the 25-minute pot life requires efficient work practices. A two-person application team is recommended.

Frequently Asked Questions

1. Why is the pot life so short compared to the waterbased epoxy?

The 25-minute pot life is a direct result of the high-solids, fast-curing chemistry that gives this system its superior hardness and chemical resistance. The rapid reaction means less waiting between coats (10–12 hours recoat vs 4 hours for waterbased) and faster return to service. The trade-off is that you must work efficiently — mix small batches and apply immediately.

2. Can I mix only part of the kit?

Yes, provided you measure accurately at the ratio of 650 mL Part B per 1000 mL Part A by volume. Use clean, graduated mixing containers. Do not estimate — incorrect ratios will result in soft spots or incomplete cure. For most users, mixing the full kit (4L Part B + 6L Part A) and working quickly with a two-person team is the simplest approach.

3. What happens if I do not use the mixed product within 25 minutes?

The mixture will begin to thicken, heat up (exothermic reaction), and become unworkable. Applying epoxy past its pot life results in poor flow-out, roller marks, and compromised adhesion. Do not attempt to thin expired mix with solvent — dispose of it and mix a fresh batch. Plan your work in manageable sections and mix accordingly.

4. How should I store unmixed hardener?

Store in a cool, dry place in the tightly sealed original container. Keep away from moisture, direct sunlight, and temperature extremes. Do not allow to freeze. With proper storage, the shelf life is an exceptional 5 years — among the longest in the Dulux Avista range.