COVERAGE - A 6KG Kit of Stopgap F78 will cover approximately 20m2 up to 95% RH (Two coat application). STOPGAP F78 is a solvent free, one component, ready to use system which dries rapidly to provide a waterproof surface membrane. STOPGAP F78 impedes the passage of residual construction moisture from affecting subsequent floorcovering installations, therefore allowing early installation of floorcoverings in fast track building programmes