Single pack moisture suppressant for floors and walls

Introduction and applications

Vapourstop is a specially prepared liquid applied membrane for use on floors, under or above screeds to provide a damp proof membrane. On walls under render or plaster as a water barrier. Protection from UV light is recommended. Under ceramic tiling as a secondary protection in wet areas, e.g. bathroom’s, showers and food processing areas. Vapourstop is supplied as viscous liquid and has a similar consistency to thick emulsion paint (in the order of 4000 mP.a.s). The membrane dries to form a tough semi-gloss finish.

Features

• Low odour
• Tough, high flexibility
• Shortens the construction time
• Minimal waste, just seal the container after use
• Alkali resistant
• Non toxic, non hazardous, solvent & plasticiser free

Packaging

Vapourstop is supplied in 15 litre containers.

Useful information

Barrier properties
A 0.6mm thick dry film of Bis-Watertite which has been allowed to cure by air at a temperature of 23 oC/50 and R/H for 7 days.

Resistance of water penetration (positive head pressure) on a porous tile biscuit prevented water at 0.2N/mm² pressure from penetrating into the tile during the 24 hour test period. This is equivalent to a 20 metre head of pressure.

Resistance of water penetration (negative head pressure). When using the membrane on the interior of basements the membrane should be overcoated with render, in order to prevent hydrostatic pressure causing localised bond failures of the membrane to the background.

Water vapour permeability
Is 4g/m 2 / 24hours at 25 oC/75%RH. As measured by BS3177.

Tensile strength (testing speed 500 mm/minute)
Tensile strength at break 4 N/sq.mm.

Elongation (testing speed 500 mm/minute)
Elongation at break 350%.

Crack bridging
Tests carried out over both cracked and uncracked mortar specimens indicate a crack bridging potential at 23 oC of at least 2mm.

Shore hardness
The membrane gives a shore hardness value of 70.

Low temperature flexibility
The membrane passes the severe mandrel test of BS3900 Part E at temperatures down to 0°C.