Polyurethane Primer (PU Primer)
Plan substrate preparation, priming, moisture control and levelling before the final floor finish.
Polyurethane Primer is a single-component installation product used to prepare concrete and comparable absorbent mineral substrates identified in its technical data for polyurethane-based flooring systems. It helps regulate porosity, control surface dusting and support adhesion of the following layer. The substrate must be sound, clean and dry; moisture, dew point, absorbency, coverage, overcoating interval and any sand broadcasting must be verified against current product data and project conditions.
Selection and technical review
Provide the concrete or screed type, strength, moisture measurement, surface profile, existing finish and planned top layer. Primers, moisture barriers and levelling products do not perform the same function. Verify application limits, thickness, consumption and recoating intervals against the current TDS/SDS for the supplied product.
Application and handover preparation
Assess weak layers, contamination and old residues using an appropriate method; detail cracks, joints and active water problems separately. Record preparation checks, the trial area, batch and application conditions. Determine next-coat timing and compatibility from the technical system instructions.
