A waterproofing membrane made of polyethylene (HDPE or LLDPE), bicolour, with a white upper surface and black underside.
The white surface is UV-stable, and is ideal for waterproofing tunnels and spaces with poor visibility and high temperatures.
The white surface accumulates less heat than a black surface, with a difference between the two of between 20 and 23º C. As a result, it is possible to work for longer periods, and the number of geomembrane waves or wrinkles is reduced.
Characteristics and advantages
|Thicknesses||From 0.75 mm to 3.00 mm|
|Width||7.5 m and 5.8 m – Other widths available upon request|
|Ambient air temperature (ºC)||HDPE geomembrane lining||Temperature of HDPE geomembrane lining (ºC)||ºC difference with smooth black lining|
|HDPE geomembrane lining||C (X10 / ºC)||AT (ºC)||L (mm)||AL (mm)||d AL|
|Black||2,4 x 10-4||67-25=42||100 x 103||630 mm||–|
|White||2,4 x 10-4||43-17=26||100 x 103||390 mm||-240 mm|
Source: Cadwallader, Cranston y Peggs 1993