5. Glossary

Additives: products added to the base waterproofing material (polymer or bitumen) to form the waterproof compound.

Assembly: all the processes used to join panels (i.e. strips and/or sheets) to form a watertight seal.

Calendering: a geomembrane production method that involves passing a molten waterproof compound between parallel rotating cylinders.

Calender: machine comprising cylinders used to produce geomembranes by calendering.

Blistering: localized swelling of the top layer of a multi-layer geomembrane caused by the expansion of gas trapped between two layers of the geomembrane, particularly gas resulting from the vaporization of liquid...