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Newton FlexJoint & Newton FlexJoint HD are closed cell expanded polyethylene foam joint fillers. Robust, non-absorbent, easy to use, economical and safe, FlexJoint & Flexjoint HD have excellent recoverable abilities of 100% from a 50% compression, low load transfer, are non extruding and have superior resistance from attack by most acids and alkalis.

FlexJoint is used in brickwork and concrete slab expansion joints, and can be supplied in either sheet form or in widths pre-cut with an easily removable tear-off strip giving controlled void formation for sealant application.

FlexJoint HD is fully certified by the Water Regulation council to BS 6920 for use in water critical applications, and is one of the only materials available currently which has this certification. FlexJoint HD is also used in heavy trafficked areas such as garage forecourts, warehouses, car parks and runways.

  • Key Benefits
  • Typical Applications
  • Suitable Substrate
  • Technical Data
  • Key Benefits

    Key Benefits

    FlexJoint

    • CFC and HFCF free
    • Cross-linked polyethylene foam
    • Full continuous tear-off strip for ease of sealant application and installation
    • Supplied in rolls, sheet form and/or pre-cut widths
    • Available in variants for any width of joint, including thicknesses of 10/12/15/20/25/30/40 and 50mm and above
    • Incredibly fast and easy to use

    FlexJoint HD

    • CFC and HFCF free
    • Cross-linked polyethylene foam
    • Heavy density 60 kg/m3
    • Full continuous tear-off strip for ease of sealant application and installation
    • Supplied in sheet form and/or pre-cut widths with a tear off strip up to a max of 25mm thick
    • Available in sheet sizes of 2 m x 1m and from 10mm thick right up to 100mm thick, including 10/12/15/20/25/30/40 and 50 mm thick
    • Incredibly fast and easy to use

    Typical Applications

    Typical Applications

    FlexJoint is used in brickwork and concrete slab expansion joints, and can be supplied in either sheet form or in widths pre-cut with an easily removable tear-off strip giving controlled void formation for sealant application.

    FlexJoint HD is also used in heavy trafficked areas such as garage forecourts, warehouses, car parks and runways.

    Suitable Substrate

    Suitable Substrate

    • Concrete
    • Brick or Blockwork

    Technical Data

    Technical Data

    Features FlexJoint FlexJoint HD Standard
    Density 29 Kg/m³ 60 Kg/m³ ISO 845
    Tensile Strength – MD 323 kPa 605 kPa ISO 1798
    Tensile Strength – TD 265 kPa 484 kPa ISO 1798
    Elongation – MD 100 % 127 % ISO 1798
    Elongation – TD 115 % 147 % ISO 1798
    Compression 10% 22 kPa 66 kPa ISO 844
    Compression 25% 42 kPa 89 kPa ISO 844
    Compression 50% 103 kPa 170 kPa ISO 844
    Compression Set – 0.5 Hrs 15.0 % 8.0 % ISO 1856
    Compression Set – 24 Hrs 6.0 % 3.0 % ISO 1856
    Compression Set 50% 0.5 Hrs 40.0 % 30.0 % ISO 1856
    Compression Set 50& 24 Hrs 29.0 % 17.0 % ISO 1856
    Working Temperature Range -60\90 °C -60\90 °C Internal
    Water Absorption %Vol (max) 1 % 1 % Internal
    Water Vapour Transmission 1.20 g/m²*24h 1.15 g/m²*24h ISO 1663
    Thermal Conductivity at 10°C 0.0380 W/mk 0.0400 W/mk ASTM C117
    Thermal Conductivity at 40°C 0.0420 W/mk 0.0420 W/mk ASTM C117

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