Solvent-free acrylic primer with a very low emission level of volatile organic compounds (VOC) for absorbent and non-absorbent substrates also with residual of old adhesives. Suitable also as adhesion promoter for levelling compounds onto substrates threated with epoxy or polyurethane primers. TECHNICAL DATA: Consistency: fluid liquid. Colour: white. Dilution rate: as is on non-absorbent surfaces, 1 : 1 or 1 : 2 on absorbent surfaces. Waiting time before applying smoothing compounds: 1-5 hours according to the surrounding conditions and the absorption of the substrate. EMICODE: EC1 Plus - very low emission. Storage: 12 months. Application: roller or brush. Consumption: 0.10-0.20 kg/m². Packaging: 5 and 20 kg tanks.