Coletanche BGM is a waterproofing composite geosynthetic lining system made with a long-fiber unwoven polyester geotextile as reinforcement, impregnated with an elastomeric bitumen compound that provides the waterproofing properties and ensuring the geomembrane’s longevity by fully impregnating the geotextile. For over 40 years, Bituminous Geomembranes (BGM) has been a practical solution for protecting the environment in Mining, Hydroelectric, Irrigation, Oil and Gas and many other civil engineering applications.