Very low-emission, water-free, one-component polyurethane primer that can be used as a:

• plasticizer barrier for old substrates and mastic asphalt before the direct bonding of parquet with elastic parquet adhesives
• protection of moisture-sensitive substrates, e.g. firmly adhering residues of adhesives and levelling compounds, prefabricated screeds made of plasterboards/fiberboards, wooden substrates, magnesia screeds
• barrier against capillary rise of moisture or residual moisture in cement screeds with a moisture content of up to 4% CM (heated cement screeds: 3% CM) and for concrete floors up to 5 wt-%

THOMSIT R 740 offers versatile use as a fast-drying primer before applying levelling compounds on absorbent and impervious substrates. It can also be applied before the direct bonding of parquet with reaction resin adhesives. It is also suitable for strengthening highly absorbent and not sufficiently stable or dusting substrates. 
THOMSIT R 740 meets the highest demands for occupational safety, indoor air quality and environmental compatibility.