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A thick sectioned, hydro-expansive waterstop for preventing water entry through joints in concrete sub-structures.

The swellable polymer/ butyl rubber waterstop strip expands in contact with water, and when fully encapsulated by poured concrete, will form a seal against concrete faces.

The seal resists hydrostatic pressure, stopping water from entering sub-structures. Developed to provide higher performance than conventional bentonite or swellable rubber waterstops.

Features and benefits:

  • Controlled, reproducible, volumetric expansion, which reduces the risk of concrete spalling.
  • Cohesive strength maintained after volumetric expansion.
  • Malleable and plastic, enabling easy application to a variety of concrete profiles.
  • Can be installed into a variety of irregular substrates.
  • No need for the use of protective steel mesh.
  • Allows for simple overlap jointing on site.
  • Reproducible swell after wet/ dry cycling.
  • Can be easily joined to other polyvinyl chloride (PVC) waterstops at movement joints.
  • Unaffected by freeze/ thaw cycling.


  • Construction joints for in-situ concrete structures.
  • Casting new concrete against existing concrete.
  • Floor slabs cast against diaphragm retaining walls, steel sheet piles and secant piled walls.
  • Joints between floor slabs and pile caps.
  • Pipe penetrations through floors and walls.
  • Remedial ‘breaking out’ of concrete.

Can be used in conjunction with Triton SwellMastic - consult manufacturer for details.

Standard product features


Light blue.

Profile size:

25 x 20 mm.


0.7 kg/m.

Technical characteristics

  • Volumetric expansion in cement water: 100% (minimum).
  • Water pressure resistance: >6 bar (60 m).
  • Density: 1.46 kg/dm³.
  • Maximum bend: 180° at 0°C.
  • Application temperature range: -15 to +60°C.
  • Service temperature range: -45°C to +120°C.
  • Concrete cover: 70 mm (minimum).
  • Overlap: 100 mm (minimum).

NBS Specification

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This product is associated with the following NBS Create clause:
45-75-42/370 Rubber hydrophilic waterstop

NBS Specification

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This product is associated with the following NBS clauses:

Product specification

An important note about specifying



Triton Systems


+44 (0)1322 318830

Product reference

Triton Adcor 500S Waterbar

Manufacturer details

Units 3-5,
Crayford Commercial Centre,
Greyhound Way,
Kent, DA1 4HF
Tel +44 (0)1322 318830
Fax +44 (0)1322 524017
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