Description Product Overview ARDEX P 51 is a concentrated, water-based primer, bonding agent, and pore sealer designed for preparing internal floor and wall substrates prior to the application of levelling compounds, adhesives, and screeds. It is a solvent-free synthetic resin dispersion that penetrates and seals porous surfaces, improving adhesion and preventing defects in subsequent layers. When applied correctly, it reduces substrate absorbency and prevents air bubbles rising through levelling compounds, helping maintain flow and finish quality. ARDEX P 51 is suitable for a wide range of substrates including concrete, timber, tiles, and plasterboard, making it a standard primer for flooring preparation across residential and commercial applications. Key Features Improves adhesion of levelling compounds and adhesives Seals porous substrates and reduces absorbency Prevents air bubbles forming in levelling systems Water-based, solvent-free, low VOC formulation Suitable for a wide range of substrates Easy to apply by brush or roller Can be diluted depending on substrate requirements Low odour and suitable for internal environments Applications Priming concrete subfloors prior to levelling compounds Preparation of timber, plywood, and particleboard substrates Sealing ceramic and porcelain tiles before smoothing Priming plasterboard and cement sheeting Use prior to ARDEX levelling compounds and adhesives General floor and wall preparation in residential and commercial projects Notes Apply by brush or roller evenly across substrate Dilute with water depending on substrate porosity Allow to dry to a clear film before applying leveller Typical drying time minimum 3 hours (site dependent) Ensure substrate is clean, dry, and free of contaminants Internal use only Technical Information Technical Specifications: Type Water-based synthetic resin primer Form Liquid (blue dispersion) Function Primer, bonding agent, and pore sealer Coverage Approx. 8–16 m² per litre (substrate dependent) Drying Time Minimum 3 hours to clear film (max 24 hours) Application Method Brush or roller Substrates Concrete, timber, tiles, plasterboard, cement sheet Location Internal use only VOC Low VOC, solvent-free Packaging 5L bottle, 20L container Shelf Life Approx. 12 months (unopened) This primer is designed to ensure reliable bonding and consistent performance of levelling systems by controlling substrate absorbency and improving adhesion. It is a standard preparation step for professional flooring installations where surface integrity and finish quality are critical.
