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RIW Structureseal - Waterproof membrane system

RIW Structureseal - Waterproof membrane system

Third party certifications:
  • BBA Agrément Certificate

    BBA Agrément Certificate

    Certificate type


Pre-applied, composite waterproof membrane system.

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+44 (0)1344 397777 www.riw.co.uk

RIW Structureseal is a CE marked waterproofing composite of high swelling sodium bentonite encapsulated between a non-woven and woven geotextile. A needle-punch process interlocks the geotextiles together forming an extremely strong composite that maintains a consistent layer of bentonite, as well as protecting it from inclement weather and construction related damage. When wetted, unconfined bentonite can swell up to 15 times its dry volume. When confined under pressure within a structure, the swelling is controlled, forming a dense, monolithic, impervious waterproofing membrane.

Fixing to vertical/ sloping surfaces:

RIW Washers as required, to suit background.

Fixing on horizontal surfaces:

RIW Staples, through laps, at maximum 400 mm centres.

Joint laps:

Side and end laps minimum 100 mm are recommended; end joints staggered. Sealing not required.


RIW Waterstop, RIW Sealing Compound and RIW Granules.

General information

Pre-applied tanking systems; Suitable for wet weather and low temperature applications; Quick and easy to apply; Does not require additional drainage or protection; Primers and adhesives not required


Sodium bentonite


1.1 x 5 m


RIW Limited’s waterproofing products will, subject to normal service conditions, provide an effective barrier to the transmission of liquid water and water vapour for the life of the building in which they are incorporated., The products must be installed in accordance with RIW written instructions, and following installation must not be subjected to any damage or long-term UV exposure

Uniclass 2015
Pr_15_57_27_39 Geosynthetic clay liners (GCLs)Primary

J40/285 Loose laid bentonite damp proofing/ tanking

Specification data - Geosynthetic clay liners (GCLs)
Product Reference

RIW Structureseal

Standard product features


6.4 mm

Digital objects
PlatformCompatibleVersionCertified to
Revit 2016 2 2.0
IFC2X3 1 1.3
Download now from NBS National BIM Library
Third party certifications
  • 02/3953 : Product sheet 1