Images for illustration purposes only New Concrete Primer will tolerate up to 98% RH. Watco New Concrete Primer can be overcoated with most types of floor paint after approximately 16 hours. The special formulation encourages penetration and good adhesion, and the flow control agents help resist air pinholes forming, essential in a damp proofing coating. Recommended areas of use Newly laid concrete Sand & cement screed Suitable for areas subject to heavy traffic Features Suppresses construction moisture which enables newly laid concrete floors to be painted and put into use quickly Virtually solvent free, epoxy resin liquid moisture barrier Withstands up to 98% RH (relative humidity) Only one coat normally needed for a completely sealed surface Ready for over coating in 16 hours Suitable for heavy wear areas Flexible Can be used with underfloor heating systems