(Shelterbit Mineral Membrane) 4.5kg/m2 mineral coated APP
bitumen membrane Excellent resistance to atmospheric agents Resistant to
chemical attacks High puncture resistance
WPM 185 (Shelterbit Mineral) is an A.P.P. (Atactic
Polypropylene) Plastomeric type modified bitumen membrane, consisting of a
specially formulated bituminous compound of distilled asphalt modified with
selected high grade visco-elastic polymers and reinforced with a combined
reinforcement (Polyester and Fibreglass). WPM 185 is coated with a slate
mineral granule topping, while the bottom surface is embossed and protected by
a heat sensitive polythene film. This type of finish for the lower surface has
been chosen for two specific purposes:
1. To act as a temperature gauge during application. When
the film melts it shows that the compound is at the correct temperature.
2. The embossing is to allow the gases to rapidly escape
when heated to its correct installation temperature avoiding possible problems
of bubbling and blistering.
Features and Benefits
Positive vapour barrier.
Excellent resistance to atmospheric agents.
Cold flexibility 5oC.
Resistant to chemical attacks.
Withstand thermal shocks.
Heat welded laps provide homogenous joint.
High puncture resistance.
WPM 185 is used as a cap layer in exposed membrane
systems (allowing light foot traffic for maintenance). WPM 185 is available in
The application of WPM 185 should be carried out by an
accredited applicator. Installation shall be strictly in accordance with the
manufacturerâ€™s recommendations. All surfaces to which the Shelterbit systems
are installed must be properly prepared prior to installation. All surfaces
must be clean, dry, smooth and free of sharp edges, fines, loose or foreign
materials, oil, grease and other materials which may damage the membrane. New
concrete must be cured a minimum of 28 days prior to the installation.
Apply to all surfaces one coat of WPM 240 Bituminous
Primer at a coverage rate of 5 square metres per litre and allow to dry
Note: when used as an intermediate layer over a base
sheet, primer is not required.
A layer of WPM 185 (Shelterbit Mineral) shall be
installed over all surfaces to be treated by LPG torch application techniques
by an accredited applicator. The WPM 185 (Shelterbit Mineral) must be fully
bonded with side laps of 7.5cm and end laps of 10cm. The membrane must be
detailed in accordance with recommendations. Overlaps shall be sealed by
WPM 185 is non-hazardous; non-dangerous goods. However
during installation exercise caution when working with open flame. Examine all
surfaces to which the flame has been applied for smouldering or burning
conditions. Do not use open flame on or near highly combustible materials.
Follow all local fire codes.
All rolls of WPM 185 should be stored in a covered area
protected against sunlight and UV radiation. Rolls should be stored in a
vertical position on a smooth floor so as not to damage the
Roll size: 1m x 8m
Roll weight: Approximately 36kg.