Keytec 642

Reinforced Polyethylene Membrane

Keytec 642 is used in the construction of reed beds, lakes, ponds, slurry pits and SUDS


  • Raw material reinforcement
  • Raw material coating both sides
  • Polyester multi-split fibre
  • LDPE

A fabric made with polyester reinforcement sandwiched between two polyethylene films.

Suggested specification

Keytec 642 is made from low-density polyethylene with 1000 denier polyester scrim reinforcement. The performance values of tensile strength are 24kN/m EN ISO 10319.96 and a drop cone test result in no greater than 8mm.The durability performance to be > 90% UV exposure to BS EN 1224 -2000 and oxidation resistance age test of less than 12% to ISO 13438.

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Material specification CE MARK to EN 13967
PropertyUnitValueTest method
Unit weightg/m²628BS ISO 965-95
Thickness (2 KN/m² pressure)1.03BSEN 964-1-95
Tensile strength at breakMDkN/m24.7EN ISO 10319-96
CDkN/m24.34EN ISO 10319-96
Elongation at strainMD%33EN ISO 10319-96
CD%31EN ISO 10319-96
Trapezoid tear strengthMDN545A STM D4533-96
CDN381A STM D4533-96
Puncture resistanceN273.3A STM D4833
Oxidation resistance testage-%11.58I SO 13438-2004
UV - exposure resistance%90BS EN 12224-2000
Determination of Resistance to Roots PASSDD CEN/TS 14416:2005