Vapourguard is a special dual membrane floating foil/cover which is used to collect rainfall water and eliminate water evaporation. Millions of small air cells keep the foil afloat.
The white top surface is designed to reflect the suns heat away while the dark underside of the material is designed to prevent light penetrating the surface, thus reducing algae growth in the water.
Small drainage holes allow rainwater to be harvested through the material. The material is highly UV-resistant and reduces contamination.
It is made from low density polyethylene and linear low density polyethylene with special formulated UV stabilisers, additives and colorants.