| abstract |
The present invention relates to a flexible sealing membrane particularly useful for covering roofs. Flexible waterproofing membrane suitable for use in the sealing of substantially flat surfaces such as roofs or the like, said membrane being substantially watertight and water vapor-proof, characterized in that it does not contain any bitumen or bituminous derivative and in that it consists essentially of at least one thermoplastic (co) polyurethane or a thermoplastic (co) polyamide, ensuring the essential of said sealing functions, said thermoplastic or (co) polyurethane or (co) thermoplastic polyamides each containing at least one monomer of natural origin integrated into the (co) polymer during their (co) polymerizations. |