is a liquid applied, latex modified bituminous elastomeric waterproofing membrane which, when fully cured, forms a permanently flexible waterproof lining to most building surfaces including reinforced concrete, block work, brick work and cement render. Clean up with water before dry.Package: 20 litres.
Single component, user friendly.
Simple application - brush, roller or spray
Low odour, non toxic water based
Purple when wet , dries black
Should be protected from sunlight
2-4 hours @25C
4-6 hours @25C
Masonry - 1.8-2.0L/ m2 or 3 coats @ 0.6L/m2 each
Concrete - 1.5-1.8L/ m2 or 2 coats @ 0.9L/m2 each
Wet Film per coat
Dry Film Thickness
Elongation @ break
>300% at 25C
58% by volume
12 months in unopened container @20C
Concrete must be cured for a minimum of 28 days and render 7 days. Remove dirt, dust, loose particles, oil and unsound concrete etc. Water blast if necessary. Surface must be dry. Fill holes and open joints in block work or concrete prior to application of membrane.
It is self priming when used on most surfaces e.g. Sound concrete, block work. Surfaces may be primed with BLW thinned with 50% water. Areas subject to rising damp should be first sealed with an epoxy coating.
Apply a bead of elastomeric sealant (eg. Neutral-cure silicone) to the following areas: Wall / footing junction where movement is expected and expansion joints, generally to all places where movement is likely to occur.
A reinforcing fabric such as 140-200mm wide polyester bandage should be used over the following areas: expansion joints, cracks, footing / floor to wall junctions, around floor/wall penetrations, and any other area movement will occur. Reinforcement is also required over construction joints in walls.
Reinforced: To the prepared surface apply a heavy coat of BLW by brush or roller at approximately 2m2/litre. Immediately lay the reinforcing fabric into the wet surface, then apply another coat and work in carefully by brush or roller to saturate the fabric. When dry apply one or more coats to give a fully waterproof lining. Ensure a minimum coverage of 1.6litres/m2. When dry, check for pinholes or misses and recoat if necessary.
Un-reinforced: To areas where a reinforcing fabric is not utilised apply 3 coats of BLW at a total rate of 1.8 litres/m2 ensuring full coverage, by brush, roller or spray (use 21 thou Min tip size + airless spray).
Porous Surfaces (Masonry): May require 3 coats to obtain a satisfactory dry film thickness.
Do not apply above 32 C or below 10 C ambient temperature. Be sure coating will cure before contract with water. Wash equipment with water before dry. Protect BLW from extended sunlight exposure. Planter box membrane must be fully cured before being subject to moisture or soil. Protect membrane against damage before and during backfilling or covering. Wrimco protection board may be used where suitable. Use an approved drainage system and protection board in planter boxes and retaining walls before filling to protect membrane from any damage. Do not expose to solvents