Vapour Barrier
F.i. Vapour Barrier is a waterborne 2-part epoxy coating specifically designed as a single coat construction primer and a dual coat negative hydrostatic membrane for use prior to the installation of waterproofing membranes, self-levelling underlayments and tile and stone installation materials.
2-part epoxy · 1:1 mix · ASTM 7088
Key features
- Single coat construction primer
- Dual coat negative hydrostatic membrane
- Waterborne two-part epoxy
- Mixed 1:1, Part A to Part B
Suitable substrates
- Concrete
- Cement composite board
- Cement masonry
- Tile
Technical data
| Standard | ASTM 7088 |
|---|---|
| Water vapour transmission | 1.33 g/m²/24 h |
| Permeance | 0.0013 µg/N.s |
| Colour | Light grey |
| System | 15 litre Part A + 15 litre Part B |
| Mix ratio | 1 part A to 1 part B |
| Pot life | Approx. 2 hours |
| Coverage · single coat | 90 m² |
| Coverage · dual coat | 45 m² |
| Wet film per coat | 1.5 mm |
| Dry film per coat | 0.625 mm |
| Dual coat minimum dry film | 1.25 mm |
| Overlay | After 24 hours at 22 °C and 50% RH, within 5 days |
| Application temperature | 8–32 °C ambient and surface |
| Humidity limit | Not to be used above 90% |
Figures summarised from the current Technical Data Sheet. The TDS is the controlling document. Confirm against the download above before specifying.
Where it is used
- Prior to waterproofing membranes
- Under self-levelling underlayments
- Before tile and stone installation
- Damp and high moisture substrates
Application
| Mixing | Mix 1 part A to 1 part B. Pot life is approximately 2 hours. |
|---|---|
| Overlay window | Overlayments may be installed after 24 hours at 22 °C and 50% RH, and must be installed within 5 days. |
| Conditions | Apply between 8 °C and 32 °C ambient and surface. Not to be used when humidity exceeds 90%. |
| Thinning | Single priming coats can be thinned with up to 15% potable water. This will not be considered as the first coat of a dual coat negative membrane. |
Limitations
- Not for use as a positive waterproofing membrane
- Not stable to ultraviolet light
- Not to be used as a trafficable finish
- Not for covering or bridging over cold, construction, control or expansion joints
- Not for preventing moisture over existing cracks or new cracks that develop after installation
- Not for installation on substrates below 8 °C and above 32 °C
- Not to be used when humidity is above 90%
- Overlayments must be installed within 5 days
Reproduced from the current Technical Data Sheet. Read the full sheet before specifying.
In the system
Pairings named in the range’s own data sheets.
F.i. Vapour Barrier technical and safety data sheets, and the full range library.
Covered by the Fliese Imports warranty, seven (7) years from the date of purchase.