Moisture Control
Stopgap F77
High Performance Rapid Curing Waterproof Surface Membrane One-Coat Application System
STOPGAP F77 is a solvent free two part epoxy resin system which cures to provide a waterproof surface membrane. STOPGAP F77 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 pigmented black to allow the user to visually control coverage uniformity.
It can be used to isolate residual construction moisture where relative humidity values are up to 98% (ASTM F2170).
- Impedes the passage of construction moisture and rising damp up to 98% RH with a single coat application
- Colour pigmented to aid coverage uniformity
- Can be applied direct over underfloor heating screeds using a coverage of 1.8m²/kg where readings are up to 90% RH
STOPGAP F77 is a solvent free two part epoxy resin system which cures to provide a waterproof surface membrane. STOPGAP F77 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 pigmented black to allow the user to visually control coverage uniformity.
It can be used to isolate residual construction moisture where relative humidity values are up to 98% (ASTM F2170).
- Impedes the passage of construction moisture and rising damp up to 98% RH with a single coat application
- Colour pigmented to aid coverage uniformity
- Can be applied direct over underfloor heating screeds using a coverage of 1.8m²/kg where readings are up to 90% RH
Stopgap F77 Overview Data sheets and Downloads
STOPGAP F77 BASE PREPARATION
It is essential that STOPGAP F77 is applied to a clean and absorbent substrate. Any surface contaminants such as surface hardeners, cement laitance etc., should be removed to produce a slightly textured surface. The surface strength of the substrate should be greater than 1.5 N/mm2. Power floated concrete should be mechanically prepared. New concrete should be left for a minimum 7 days before surface preparation and application of the membrane.
For further guidance please refer to the F. Ball Subfloor Preparation Guide.
Rough, uneven or damaged concrete screeds must be smoothed/repaired with STOPGAP 1500 or STOPGAP 460 EXTERIOR REPAIR. Joints between bays where continual movement of the base is not anticipated or small hollows may be filled with STOPGAP F77 mixed with clean dry sand and allowed to fully cure before applying the membrane.
Care must be taken to minimise the occurrence of pinholes in the compound when pre-smoothing.
It is essential that hygrometer readings in accordance with ASTM F2170 are taken and recorded prior to commencing the installation.
For details on other subfloors, contact our Technical Service Department.
Videos
How to mix and apply Stopgap F77 - High Performance Waterproof Surface Membrane
STOPGAP F77 is a solvent free two part epoxy resin system which cures to provide a waterproof surface membrane. STOPGAP F77 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 pigmented black to allow the user to visually control coverage uniformity.
It can be used to isolate residual construction moisture where relative humidity values are up to 98% (ASTM F2170).
