The adhesion-improving primer for absorbent surfaces Butadiene-styrene-based synthetic resin dispersion Pretreatment for OTTOFLEX® liquid film on absorbent and highly absorbent substrates, such as gypsum plasterboard, gypsum components, plaster, concrete, aerated concrete, masonry, stone, screed, chipboard or wood fiberboard In combination with OTTOFLEX® liquid film, it meets moisture resistance classes A0 according to the ZDB data sheet and A according to abP Tested in conjunction with OTTOFLEX® liquid film in accordance with the testing principles for issuing a general building inspection certificate for liquid-processed sealing materials in conjunction with tile and slab coverings Corresponds to stress classes W1 and W2 according to ÖNORM B 3407 Always read the label and product in.