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Product Description

  • Outperforms all other high performance flexible DPCs
  • Contains no hazardous pitch or PVC plasticizers
  • Excellent tear resistance under high compressive loads
  • Low permeability to Radon and Carbon Dioxide gases
  • BBA Certificate No.94/3059

Visqueen Zedex CPT High Performance Damp Proof Course (DPC) and cavity tray system is manufactured from co-polymer thermoplastic (CPT) providing all the characteristics necessary for it to perform effectively for the lifetime of the building in which it is incorporated. Visqueen Zedex CPT DPC provides superior strength, tear resistance and flexibility and is compatible with all other Visqueen damp proofing, gas proofing and tanking protection systems.


Visqueen Zedex CPT DPC is suitable for use as a DPC in all types of building construction and can be used in vertical, horizontal, stepped and cavity tray applications.

On Site

High tear and puncture resistant characteristics help avoid the failures caused by damage during installation, such as clearing mortar droppings out of the cavity, general manhandling on site and during transport. Independent testing shows the tear strength of Visqueen Zedex CPT DPC to be many times that of traditional pitch polymer DPCs.


Visqueen Zedex CPT DPC is also available in a range of colours, subject to minimum order quantities and lead times, to match the mortar or outer leaf. The most popular colours are white and sandstone. Our technical department will be happy to assist you with product specifications.

Mortar adhesion

Visqueen Building Products commissioned Ceram Building Technology to test Visqueen Zedex CPT DPC under BSI’s DD86 Part 1 1983 for flexural bond strength and shear strength. These independent tests show that Visqueen Zedex CPT DPC has excellent mortar adhesion characteristics. With DPCs being used extensively outside the original ground level applications, understanding the effect of a damp proof course on wall strength becomes increasingly important.


Visqueen Zedex CPT DPC avoids the risks of any incompatibility between the damp proof course and other damp or waterproofing materials. It can be used with a wide range of products such as silicon mastics without causing discolouration, and bituminous liquid DPMs. Such compatibility is essential to ensure a continuous waterproof barrier for the lifetime of the building. Clean and safe to handle, the materials used in Visqueen Zedex CPT DPC are chemically stable and inert, free of both solvents and aggressive chemicals. Visqueen Zedex CPT DPC is also clean and safe to use, requiring no special conditions for storage, transportation, handling, usage or recycling.

Fully recyclable. Strong and flexible. Robust and puncture resistant. High tear strength. Excellent workability in winter conditions.