1. Sealing membranes

A number of different coatings are available in thin sheets of thermoplastic polymers (1 to 2 mm thick):

• Plastic-coated PVC :

  • chlorinated polyethylene (CPE),

  • ethylene-bitumen copolymer (ECB), rarely used,

  • chlorosulfonated polyethylene (CSPE) in Hypalon from DuPont,

  • thermoplastic polyolefins (TPO) ;

• elastomer membranes or sheets :

  • polyisobutylene (PIB),

  • butyl rubber,

  • EPDM rubber = ethylene-propylene-diene monomer.