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Dryflex WS - Hydrophilic TPE


With our Dryflex WS range we have turned the usual water-resistant properties of TPEs on their head to engineer materials that swell up to ten times their volume when immersed in water.

Dryflex WS are a range of thermoplastic elastomers (TPE), which contain hydrophilic particles. They swell at a controlled rate and percentage, with swell rates from 300 to 1000% when immersed in water. When there is no longer water present the compound shrinks back to its original size, a process that can be repeated an almost unlimited number of times.

Dryflex WS materials are used in applications to form a positive seal and prevent the ingress or exit of water. We have also developed softer grades which offer excellent drapability. They are an ideal choice for water stop applications where the profiles may be coiled or need to be fitted around complex structures.

Compounded in any colour, the water swellable TPE is 100% recyclable and can be processed using conventional plastic fabricating methods, including extrusion and injection moulding.

How it works

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Applications include

  • Waterstops
  • Water treatment plants
  • Tunnels, drains & sewers
  • Water tanks
  • Seals

Download Dryflex WS Product Guide

    • Contact WS

      For more information about about Dryflex WS hydrophilic TPE compounds, please contact WS@hexpolTPE.com

    • Hydrophilic TPE Timelapse Video

      See Dryflex WS in action! We've created a timelapse video, with shots taken every 15 minutes over a seven day period.

    • hydrophilic TPE for water stops

      Water Stop

      Water stops are flexible strips which are used in concrete construction joints to provide a positive seal by expanding upon contact with water.

      Our Dryflex WS range of hydrophilic or 'water swellable' TPE compounds includes grades which swell from 300 up to 1000% when immersed in water. When there is no longer water present the compound shrinks back to its original size.

      Material: Dryflex WS Hydrophilic TPE compounds