Crommelin WB2K Epoxy Primer, Sealer And Moisture Barrier Grey

Crommelin WB2K Water-Based Epoxy Primer, Sealer & Moisture Barrier

Crommelin WB2K is a two-component, waterborne epoxy primer, sealer and moisture barrier designed to protect concrete and masonry surfaces while helping control moisture migration. Combining the adhesion and durability of epoxy resin with the convenience of a water-based formulation, Crommelin WB2K is suitable for a wide range of residential, commercial and industrial applications across Australia.

Designed for use as both a positive-side and negative-side moisture barrier, this versatile epoxy coating helps control rising damp and moisture vapour transmission before the installation of compatible waterproofing membranes, floor finishes and other coatings. It can also be used as an abrasion-resistant concrete floor sealer in areas requiring a tough, impervious protective coating.

Reliable Moisture Control for Concrete and Masonry

Crommelin WB2K is suitable for applications involving concrete floors, basements, tunnels, foundations, retaining walls, planter boxes, balconies, podium decks and water-retaining structures. It can also be used as a moisture vapour barrier beneath timber flooring, subject to confirmation of system compatibility and project requirements.

Its excellent adhesion to suitably prepared damp or dry surfaces makes it a practical option for many building, renovation and construction projects. Substrates must not be saturated with standing water, and moisture content must not exceed the manufacturer's specified limit of 30%.

Suitable for a Range of Substrates

Crommelin WB2K can be applied to suitably prepared concrete, cement render, brickwork, blockwork, metal, plaster, wet-area Gyprock, wet-area fibre cement, wet-area particleboard and Scyon substrates. Correct surface preparation is essential to achieve reliable adhesion and long-term performance. A trial application and adhesion test are recommended before coating the full area.

Key Features and Benefits

• Two-component, water-based epoxy primer, sealer and moisture barrier.
• Suitable for positive-side and negative-side moisture barrier applications.
• Helps control rising damp and moisture vapour before compatible floor finishes and waterproofing systems.
• Provides a tough, impervious and abrasion-resistant coating.
• Offers resistance to oils, fats, salts, hot water and a range of chemicals.
• Suitable for brush, roller or spray application.
• Low-sheen to semi-gloss finish in light grey.
• Water-based formulation with a reported VOC content of 48 g/L.
• Compliant with APAS 181 VOC limits and the stated Green Star – Design & As Built v1.1 indoor pollutant requirements.

Coverage, Mixing Ratio and Application

Crommelin WB2K requires two coats, with a recommended coverage rate of approximately 5–7 m² per litre per coat. The product has a 1:1 mixing ratio by volume and is supplied in pre-measured two-component kits. Allow approximately 4–6 hours between coats under suitable conditions, and allow 24 hours before applying compatible waterproofing membranes or other coatings. Full cure is approximately seven days at the stated test conditions.

Apply between 10°C and 25°C, avoiding relative humidity above 85% during the initial curing phase and conditions where rain is expected before curing. The mixed product has an approximate pot life of 25–45 minutes, depending on temperature and humidity.

Available Kit Sizes

Crommelin WB2K is available in 8 L and 20 L kits, making it suitable for a range of smaller waterproofing projects and larger commercial or industrial applications. Select the appropriate kit quantity based on the prepared surface area, substrate porosity, specified coverage and the requirement for two coats.

Buy Crommelin WB2K in Australia

Looking for a water-based epoxy moisture barrier for concrete floors, rising damp control or preparation before waterproofing? Crommelin WB2K offers a versatile solution for builders, contractors, applicators and property maintenance professionals working on residential, commercial and industrial projects throughout Australia.

For Australian projects, confirm substrate suitability, moisture conditions and compatibility with the intended waterproofing membrane or floor finish before application. Always follow the latest Crommelin technical data sheet and full application instructions.