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
Product specifications
| Thicknesses | From 0.75 mm to 3.00 mm |
| Width | 7.5 m and 5.8 m – Other widths available upon request |
Additional information:
| Ambient air temperature (ºC) | HDPE geomembrane lining | Temperature of HDPE geomembrane lining (ºC) | ºC difference with smooth black lining |
| 30 | Smooth black | 67 | – |
| Textured Black | 64 | -3 | |
| Grey/White | 49 | -18 | |
| White | 43 | -24 | |
| 18 | Smooth Black | 25 | – |
| White | 17 | -8 |
| 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
