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We are now open and processing orders in line with Government advice. We are offering a 1-3 day delivery service and a contactless click and collect service from our Bristol Depot.
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£25.50 Ex VAT
£30.60 Inc VAT
A black Butyl tape for joining membranes along the flange where membranes overlap.

Membrane Jointing Tape

PermaSEAL damp proof membrane jointing tape is a black Butyl tape used for joining PermaSEAL membranes along the flange where they overlap.

It is used for abutting joints, for repairs or where membranes have been cut to enable them to overlap such as at corners, reveals, wall/floor joints or protrusions through the membrane.

It is an excellent general purpose sealing and repair product. It is also suitable for jointing green roof membranes as additional protection against roots.

PermaSEAL BBA approved waterproofing system

Our PermaSEAL waterproofing system has BBA approval, awarded by the UK’s leading building product certification body. Independent, expert-led and trusted by professionals, BBA certificates are a symbol of quality within the construction industry. You can use our PermaSEAL 8 and 20 membranes and related products safe in the knowledge they have been independently tested to ensure the highest quality levels.


  • Part of the PermaSEAL BBA Approved Waterproofing System
  • An excellent general purpose jointing tape
  • Ideal for abutting joints and for carrying out repairs
  • Can be used on all waterproofing membranes


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