Do not use on sulfite liquor and soft bitumen adhesives. Thomsit R 790 is not a seal against moisture. Very low-emission, two-component polymer dispersion special cement primer as a joint filler and bonding bridge for Thomsit fillers, as well as for firmly locking metal angles on absorbent and dense substrates, such as: Wooden floorboards, chipboard V 100, OSB boards, parquet floors and other wooden substrates with joints Previously mentioned substrates as old substrates with firmly adhering, waterproof adhesive/filler residues Do not use on sulphite waste and soft bitumen adhesives. The filling primer is not a seal against moisture. Thomsit R 790 meets the highest requirements for occupational safety, indoor air quality and environmental compatibility. Benzisothiazolin-3-one, reaction.