Bona D515 MultiPrime is a water-based, low-emission primer designed for improving adhesion on absorbent and non-absorbent subfloors before the application of adhesives or levelling compounds. It regulates surface absorption, binds residual dust and ensures a stable, uniform base for further installation layers. Fast-drying and easy to apply, Bona D515 is ideal for professional floor preparation, providing a reliable bonding surface for Bona adhesives and smoothing systems. Key Features Water-based acrylic primer Improves adhesion on a wide range of subfloors Regulates absorbency of porous substrates Binds dust and stabilises weak surfaces Low emission and easy to apply Fast drying for efficient workflows Compatible with Bona adhesives and levelling compounds Recommended Uses Priming concrete and cement screeds Preparation before applying levelling compounds Use prior to Bona adhesive systems Improving bonding on porous and slightly absorbent substrates Application Instructions Ensure substrate is clean, dry, solid and free from grease, oil and dust. Apply evenly using a roller, brush or suitable applicator. On highly absorbent substrates, dilution with water may be required. Allow to dry completely before applying the next layer. Drying Time Ready for next stepApprox. 1–2 hours (depending on conditions) Coverage Approx. 100–150 g/m², depending on substrate porosity and application method. Technical Data BrandBonaProductBona D515 MultiPrimeTypeWater-based acrylic primerPackaging10 kgApplication rate100–150 g/m²UseSubfloor priming and preparationSubstratesConcrete, screeds, porous mineral floorsCompatibilityBona adhesives & levelling compoundsSKUUFSBONAD51510KG FAQs Is Bona D515 a moisture barrier?No — it is a primer, not a DPM. For moisture protection use Bona R540 or R590. Do I need to dilute it?Only on highly absorbent substrates; otherwise it is ready to use. Can it be used before levelling compound?Yes — it is ideal for preparing the surface before applying smoothing compounds. What is the main benefit?It ensures strong adhesion and a stable, uniform substrate.
