Vandex Expaseal N


An expanding waterstop for construction joints. Consists of a hydrophilic chloroprene rubber with versatile swelling properties.


  • Highly flexible; easy application.
  • Resistant to water pressure up to 2.5 bar.
  • Suitable for zones with tidal water movement and contact with sea water.
  • Temporary swelling protection in case of premature water contact.
  • Swelling process is reversible.

Used to waterproof construction joints and pipe inlets in concrete structures which are exposed to permanent or temporary hydrostatic pressure.

General information

Uniclass 2015

Pr_35_90_15_74 Rubber hydrophilic waterstopsPrimary


D40/565 Proprietary waterstops

E40/320 Hydrophilic waterstops

Specification data - Rubber hydrophilic waterstops

Product Reference

Vandex Expaseal N 2005

20 x 5 mm.

Vandex Expaseal N 2010

20 x 10 mm.

Standard product features




  • Expaseal N 2005: 166 g/m.
  • Expaseal N 2010: 342 g/m.

Technical characteristics:

  • Density: 1.65 kg/dm³.
  • Tensile strength: 1.2 MPa.
  • Elongation at rupture: 525%.
  • Swelling capacity (by weight): ≥ 155%.
  • Application temperature: -15°C to +50°C.


  • For joint widths of 200–400 mm, Vandex Expaseal N is fixed in the middle of the joint.
  • Thicker walls can be fitted with two Vandex Expaseal N waterstops.
  • Product is set into the joint with Vandex Uniflex or another suitable adhesive, or mechanically fixed in the construction joint with nails (4–5 nails per linear meter), or a fixing rail.

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