STOPGAP F77 is a solvent free two part epoxy resin system which cures to provide a high performance waterproof surface membrane. It impedes the passage of residual construction moisture and rising damp from affecting subsequent floorcovering installations, therefore allowing early installation of floorcoverings in fast track building programmes.
STOPGAP F77 is black in colour which allows the user to visually control application coverage and ensure uniformity. You can use it to isolate residual construction moisture where relative humidity values are up to 98%, providing a moisture management solution for a wide range of environments.
You can apply our high performance waterproof surface membrane directly over underfloor heating screeds, using a coverage of 1.8m²/kg where readings are up to 90% RH. This makes it suitable for use in new builds and modern renovation projects.
It has a working time of 30 minutes and a cure time of approximately 3 hours when at an ambient temperature of 20ºC, offering both speed and efficiency. It has a shelf life of 18 months in unopened containers stored in good conditions. This makes it a reliable product for both current and future projects.
Coverage:
Applications up to 98% RH – 1.8m²/kg
Applications with underfloor heating up to 90% RH - 1.8m²/kg
Applications up to 85% RH – 2.5m²/kg