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High Density Polyethylene Root-Proof Liner

CP640 is a High Density Polyethylene (HDPE) sheet used to provide an impermeable root-proof barrier.

CP640 is used in conjunction with the CP250 waterproofing system. Once installed over the cured membrane, CP640 protects the membrane from root penetration in green roof systems, planters and similar installations.

  • Extremely durable protection against root penetration in green roof systems
  • Ideal protection for CP250 waterproof membranes
  • Lightweight and flexible material is easy to handle and install
  • Excellent chemical, biological and mechanical resistance

Method of Application

CP640 is installed over the cured membrane. Cut to length and / or shape using a sharp knife. To achieve a high integrity barrier, all seams should be thermally welded. In less critical situations a 600 mm overlap can be used, or 150 mm with overlap and taped seams.

For full application details, contact tremco illbruck customer services on 01942 251400.

Technical data

CompositionHigh Density Polyethylene (HDPE)
Mass0.8 kg/m²
(@2 kPa to EN 964-1)
0.85 mm
Service Temperature Range-20°C TO +80°C

Chemical Resistance
(EN 14030)

Excellent resistance to common chemicals
StorageStore in shaded dry conditions between +5°C and +25°C
Shelf Life12 months when stored as recommended in original unopened containers
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