Description Product Overview ARDEX PU 30 Rapid is a one-component, ready-to-use polyurethane primer and green slab sealer designed for use on internal and external porous and non-porous substrates. It penetrates the surface of the substrate, consolidating and strengthening it while blocking capillary moisture up to 98% relative humidity. The formulation allows it to function as both a primer and moisture suppressant, improving adhesion of polyurethane and MS-based adhesives as well as supporting levelling compound applications when used with a sand broadcast system. It is suitable for use over a wide range of substrates including concrete, green concrete, levelling compounds, fibre cement, timber, tiles, and terrazzo. Key Features One-component polyurethane primer – ready to use Suitable as a green slab sealer up to 98% RH Penetrates and consolidates substrates to approx. 2mm depth Blocks capillary moisture and improves bond performance Suitable for porous and non-porous substrates Compatible with polyurethane and MS flooring adhesives Low VOC, solvent-free formulation Internal and external application capability Applications Priming concrete and green concrete slabs Moisture suppression prior to flooring installation Preparation for polyurethane and MS adhesives Use over levelling compounds and smoothing cements Priming fibre cement, timber, tiles, and terrazzo Subfloor preparation in residential and commercial environments Notes Insert tool carefully behind moulding to avoid surface damage Apply gradual leverage rather than sudden force Use nail slots to remove fixings cleanly where possible Work progressively along the length of the trim for best results Protect finished surfaces where required during removal Inspect tool edges regularly to maintain performance Technical Information Technical Specifications: Type One-component polyurethane primer / moisture suppressant Form Liquid Application Method Roller (short nap or foam) Coverage (Primer – 1 coat) 100–150 g/m² (approx. 110 m² per 11kg) Coverage (Moisture Suppressant – 2 coats) 250–350 g/m² (approx. 44 m² per 11kg) Drying Time Approx. 45 minutes per coat (23°C, 50% RH) Moisture Control Up to 98% RH Penetration Depth Up to approx. 2mm Substrates Concrete, green concrete, timber, fibre cement, tiles, terrazzo Location Internal and external VOC Low VOC, solvent-free Packaging 11kg container Shelf Life Approx. 12 months (unopened) This product is designed for situations where both priming and moisture control are required prior to flooring installation. Its ability to seal green concrete and improve adhesion makes it suitable for fast-track projects and challenging subfloor conditions.
