Concentrated primer used as a bonding course for THOMSIT leveling compounds on:

• absorbent substrates (e.g. cement screeds, calcium sulfate screeds and pre-fab screeds)
• non-absorbent substrates (e.g. tiles and terrazzo floors)
• chipboards (P4 to P7) and OSB boards (OSB2 to OSB4)
• firmly adhering, waterproof residues of adhesives and leveling compounds
• reaction resin layers that are used as intermediate priming coat

Do not use on substrates with remains of sulfite liquor adhesives or soft bitumen adhesives.