Dulux Avista Waterbased Epoxy Part B Hardener 5L — Professional Internal Floor Coating

The Dulux Avista Waterbased Epoxy Part B Hardener is the hardener component of a premium two-part, water-based epoxy coating system designed for internal concrete floors. When combined with the Waterbased Epoxy Part A Resin (sold separately) in a 1:1 ratio by volume, it initiates the chemical curing process that transforms the liquid resin into a tough, durable, seamless floor coating.

This hardener is specifically formulated for the Dulux Avista waterbased epoxy system and must not be substituted with other hardeners or used with different resin systems. The resulting cured coating delivers excellent adhesion to concrete, broad chemical resistance, and a professional self-smoothing finish suitable for garages, workshops, retail showrooms, and residential interiors.

Important: This is Part B of a two-part system. You must also purchase Dulux Avista Waterbased Epoxy Part A Resin to create a working coating. Mix equal volumes (1:1) of Part A and Part B immediately before use. Pot life after mixing is 2–3 hours at 25 °C.

Key Features & Benefits

• Two-Part Curing System: Chemically cross-links with Part A Resin to produce a hard, durable coating far tougher than single-pack alternatives.
• Water-Based: Low VOC formulation suitable for indoor application with minimal disruption.
• Excellent Compatibility: Formulated exclusively for Dulux Avista Waterbased Epoxy Part A Resin — guaranteed chemical compatibility.
• Good Pot Life: 2–3 hours working time at 25 °C allows unhurried application of mixed product.
• Fast Return to Service: Light foot traffic after 24 hours; full vehicle traffic after 4 days.

System Specifications (when mixed 1:1 with Part A)

• Mix Ratio: 1:1 by volume
• Pot Life: 2–3 hours at 25 °C
• Track Free: 2–4 hours
• Recoat: 4 hours
• Light Traffic: 24 hours
• Full Cure: 4 days
• Application Temperature: 10 °C – 35 °C

Application Guidance

Pour the entire contents of Part B into the Part A container (or measure equal volumes into a clean mixing vessel). Mix thoroughly for 2–3 minutes using a mechanical mixer. Mix only what can be applied within the pot life. Pour onto the prepared floor, spread with a squeegee, and back-roll for a uniform finish.

Frequently Asked Questions

1. Can I use this hardener with a different brand of epoxy resin?

No. This hardener is formulated exclusively for Dulux Avista Waterbased Epoxy Part A Resin. Epoxy chemistry is highly specific — mixing different brands or systems can result in incomplete curing, soft spots, poor adhesion, or hazardous chemical reactions. Always use matching Part A and Part B from the same manufacturer and product line.

2. What happens if I mix the wrong ratio?

The 1:1 ratio is critical. Too little hardener and the coating will not fully cure — it may remain soft, sticky, or fail to harden. Too much hardener can cause brittleness, discolouration, or accelerated curing that prevents proper flow-out. Measure carefully and mix thoroughly.

3. Can I store leftover mixed epoxy for later use?

No. Once Part A and Part B are mixed, the chemical reaction begins and cannot be stopped. Any mixed product not used within the 2–3 hour pot life must be disposed of. Only mix what you can apply within this window.

4. How should I store unmixed Part B hardener?

Store in a cool, dry place in the original unopened container. Keep the lid tightly sealed when not in use — exposure to moisture and air can degrade the hardener over time. Do not allow the product to freeze. Shelf life is approximately 2 years in proper storage conditions.

5. Does the hardener have a strong smell?

No — this is a water-based system with minimal odour. Unlike solvent-based epoxies, it can be applied in enclosed spaces without overwhelming fumes. Basic ventilation is recommended during application and curing, but the low-odour formulation causes far less disruption to occupied homes and businesses.

6. Is this product suitable for outdoor use?

No. The waterbased epoxy system is formulated for internal use only. It is not UV stable and will degrade (chalk and discolour) if exposed to direct sunlight. For exterior applications requiring a two-part system, consider Dulux Avista 2 Pack Urethane or Polyaspartic Sealer.