LIQUID ROOFING MEMBRANE

Product Description -

A water based roofing membrane with very high performance, it ensures easy, reliable finishes for new roofs, as well as durable renovation of old, defective roofs.

Excellent weather resistance.

Easy applied: Brush, roller or spray application, with no need for heating, no limited pot life, no cutting or fitting, and no after sealing of joints.

Easy cleaning: All equipment is easily cleaned with water before the compound dries.
Highly durable: Proven in the UK and Australia: no brittlement, takes up movement in the substrate.

Highly water resistant: Specially developed for use where "ponding" may persist on flat roofs, giving resistance to at least 10cm (4 inches) of water over 4 months and retaining adhesion during immersion.

Colours Available: White, Black, Tile Red, Green, and Light Grey

Recommended Substrate: Good bonding can be obtained on all sound surfaces with adequate roughness and porosity; e.g slate, burnt clay and concrete tiles, bituminous roofing felt, asbestos -cement, concrete, concrete and cement render, plastics: whether expanded, foamed or in sheet form, may provide insufficient key, and should be checked carefully, possibly with a small trial to assess adhesion.

Cracked roofing, or roofs with expansion joints or other structural joints prone to movement must be treated with a reinforcing scrim using the procedure prescribed below. The application of a scrim in this way is always beneficial, and may be used to increase the strength and wearing properties of the roofing membrane in all situations.

After appropriate cleaning, disinfecting and priming (see table) a heavy brushed coat or liquid membrane is applied; the polyester scrim is then pressed into the wet coat, without being pushed into any wide gaps. The membrane should should then be left to dry before being finished with 2 brushed coats or one spray coat.

Special treatment for particular types of roofing material, and for certain common defects in old roofs is outlined in the table.

The liquid membrane can be applied by brush or spray; two brushed coats or one spray coat should give the required minimum coating thickness of 0.4mm (0.015 in) corresponding to a total maximum spreading rate of 0.5 1/m2 (15 yd2/ gallon).

Whenever more than one coat is applied i.e. with brush and when scimming over joints and cracks, there must be an adequate interval to ensure good drying, but successive coats must be applied within three days of each other.

Do not apply if rain or frost (roof temperature below 5ºC) are likely before drying is complete, although once dry, the membrane is fully resistant to frost and rain.

Minimum/maximum period allowed for overcoating:

Minimum- 2-3 hours
Maximum 72 hours
Recommended 24 hours

Water vapour transmission rates at appropriate dry film thickness based on 400 microns per coat. WFT (after 11 days at the rate 13g/m2/24 hours.  After 24 days at the rate of 10g/m2/24 hours.

Tensile strength at similar thickness (breaking strength - 67n/m2 (20º)

Elongation (at break 812%(20º) (elongated at 5cm/minute, using a 2kg load cell.

Life expectancy at stated thickness: 10-15 years.

Health & Safety

Before use please request, our latest Health and Safety Data Sheet

This information is given in good faith for the guidance of users, but is without warranty or liability.