Calendering

A continuous process in which heated rollers squeeze a polymer or rubber compound into sheet of closely controlled thickness. It is widely used to produce single-ply roofing and waterproofing membranes, including EPDM and PVC sheet, as well as many industrial rubber products.

Related terms

EPDM

Ethylene propylene diene monomer (M class) rubber, a synthetic elastomer with excellent resistance to ultraviolet light, ozone and weathering. In roofing it is used as a single-ply waterproofing membrane, often supplied in large prefabricated sheets, and it is also widely used for seals, gaskets, hoses and glazing profiles in the automotive, marine and industrial sectors.

Roofing & waterproofingMaterials science (general)ConstructionAutomotiveMarineIndustrial

Single-ply membrane

A factory-manufactured polymeric waterproofing sheet, typically EPDM, TPO or PVC, installed in a single layer and joined at laps by welding, adhesive or tape. Single-ply systems may be mechanically fastened, fully adhered or ballasted, and are widely used on flat and low-pitched roofs.

Roofing & waterproofingConstructionIndustrial

Vulcanisation

The chemical crosslinking of rubber, traditionally with sulphur under heat and pressure, which converts a mouldable compound into a durable elastomer. Cured EPDM roofing membranes and many sealing profiles are vulcanised during manufacture.

Manufacturing processesRoofing & waterproofingMaterials science (general)ConstructionAutomotiveIndustrialMarine

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