Home > Companies > GCP Applied Technologies > Adcor® SAS 500S

A self-adhered waterstop for fast, secure application, protecting joints in concrete sub-structures against water penetration.

The product has been specifically developed to provide a faster waterstop application and higher performance than conventional bentonite or swellable rubber waterstops.

Adcor® SAS 500S is a hydro-expansive waterstop that provides a continuous bond to substrates (concrete, metal or PVC), preventing water entry through joints in concrete sub-structures. It combines GCP’s proven self-adhesive technology with the Adcor® conformable, swellable polymer/ butyl rubber waterstop strip which expands in contact with water.

The sealing of the joint is achieved by the expansion of Adcor®. When fully encapsulated by poured concrete, the expansive forces form a seal against concrete faces. The seal resists hydrostatic pressure, stopping water from entering sub-structures.


  • 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.
  • Vertical, overhead, horizontal locations.

Features/ Benefits:

  • Controlled volumetric expansion - reduces risk of concrete spalling.
  • Faster, safer installation without fixings or power tools.
  • Strong, instant adhesion to substrates in any position (horizontal, vertical or overhead).
  • No need for nails and steel mesh, or special tools.
  • Easy application between steel bars.
  • All in one – fixings and waterstop combined.
  • Conformable – can be installed onto a variety of geometrical substrates.
  • Controlled volumetric expansion - reduces risk of concrete spalling and premature swelling.
  • Volumetric expansion min 100% in cement water.
  • Retains cohesive strength at both original and expanded volume.
  • Resists at least 6 bar (60 m) hydrostatic pressure.
  • Reproducible swell after wet – dry cycling.
  • Unaffected by freeze/thaw cycling.
  • Simple overlap jointing on site.
  • Can be easily joined to GCP PVC waterstops at movement joints.

Standard product features


25 x 20 mm.


Light blue.

Technical properties:

  • Volumetric expansion in cement water: >100%.
  • Water pressure resistance (60 m): >6 bar.
  • Density: 1.46 kg/dm³.
  • Weight: 0.7 kg/m.
  • Maximum bend (0°C): 180°.
  • Application temperature: 5–40°C.
  • Service temperature: -45 to +120°C.

NBS Specification

NBS Create logo
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



GCP Applied Technologies


+44 (0)1753 490000

Product reference

Adcor® SAS 500S

Secura clips

[Not required]

Manufacturer details

580-581 Ipswich Road,
Berkshire, SL1 4EQ
Tel +44 (0)1753 490000
Fax +44 (0)1753 490001
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