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PermaSEAL 20 Floor Membrane 2m x 20m x 5 rolls

£695.00 Ex VAT
£834.00 Inc VAT
Big savings on bulk buy pallets of PermaSEAL 20 Floor cavity drain membrane. A 20mm stud profile gives it a high drainage flow rate of 36,000 litres per hour for each square metre of membrane.

Bulk Buy Basement Floor Cavity Drain Membrane - 40m² x 5 rolls

The 20mm stud profile of the PermaSEAL 20 cavity drain membrane creates a large 14 litre per square metre void, ideal for areas of high levels of water ingress and water movement.

It can be used as a high performance drainage membrane solution for walls or vaulted soffits where extremely high levels of water ingress are a problem. PermaSEAL 20 is also used in tunnels, civil construction and for commercial properties.

It is guaranteed against deterioration for 30 years and with a life expectancy of at least 50 years (DIN: 9001:2000).

Buy PermaSEAL 20 Direct

Permagard is able to offer contractors huge savings when they buy our Floor membranes by the pallet. All pallets are available with next day delivery when ordered before 1pm. The PermaSEAL 20 floor membrane comes in a 5 roll pallet with a hefty bulk discount.

PermaSEAL waterproofing system

Our PermaSEAL waterproofing system is trusted by professionals. You can use our PermaSEAL 8 and 20 membranes and related products safe in the knowledge they meet the highest quality levels.

Technical Support

If you haven’t used PermaSEAL cavity drain membranes before or have any technical questions, then Permagard is more than happy to help. We pride ourselves on offering you the information you need both before and after any purchase. Call us on 0117 982 3282.


  • Suitable for high levels of water ingress
  • High drainage flow rate
  • Guaranteed against deterioration for 30 years
  • Life expectancy of at least 50 years (DIN: 9001:2000)
  • Highly resistant to water, alkalis, saline solutions & organic acids
  • Resistant to bacteria, fungi and other small organisms
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