SwellSeal Waterbar


  • Capable of swelling up to 4 times in volume
  • Can withstand up to 5 bar of hydrostatic pressure
  • Can be used in conjunction with non-expanding rubber
  • Reversible expansion process
  • Easy to install
  • Suitable for vertical and horizontal
  • Ideal for around pipework due to slim 7 mm thickness
SwellSeal Waterbar
SwellSeal Waterbar 910.00

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SwellSeal Waterbar is an extruded rubber compound made from butyl rubber, hydrophilic resin, polyethylene, silicone and special admixtures. It is used to seal joints on many poured-in-place and below-ground precast concrete applications.

SwellSeal produces a water-tight seal when under conditions of confinement as it moulds itself to the surrounding surfaces. On contact with water it is capable of swelling up to 4 times its own volume, even fillings gaps which are uneven in size. This means SwellSeal can be used without the need for any high-compression force.