For absorbent and impervious substrates

Properties

• Universal use    
• Reliably seals against moisture
• Prevents plasticizer migration    
• Fully cured after only one hour

Description

Very low-emission, water-free, one-component polyurethane primer used for:

• Sealing old, existing substrates and mastic asphalt before direct bonding with elastic wood flooring adhesives (plasticizer barrier)
• Protecting moisture-sensitive substrates such as firmly adhering adhesive residues, dry building boards, wooden substrates, magnesia screeds and magnesium oxychloride screeds
• Sealing against capillary rise of moisture or residual moisture in concrete floors and cement screeds with a moisture content up to 4 % CM (heated cement screeds: 3 % CM)

Thomsit R 740 can be universally applied as a fast-drying priming coat before carrying out screeding work on absorbent and impervious substrates. It can also be applied before the direct bonding of wood flooring using reaction resin adhesives. It is also suitable for strengthening highly absorbent and not sufficiently stable or dusting substrates.