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About Our Joint Former Lightweight, cross-linked, closed cell, expanded Polyethylene joint former

Joint former is lightweight and used as an expansion / contraction joint former. Joint former is a lightweight, cross-linked, closed cell, expanded Polyethylene joint former. It has particularly good compression qualities with remarkable recovery capacity and is chemical and water resistant. Glue Joint former onto concrete face and cast next section of concrete. A neat and even joint will be formed. Doesn’t need bond breaking strip and is compatible with silicone.

Joint former Lightweight, cross-linked, closed cell, expanded Polyethylene joint former

DIRECTIONS FOR USE

  • Ensure all concrete surfaces are free from base grit and dust.
  • Apply glue in vertical strips ± 100 mm wide and 25 mm from the top to avoid the
        tear-off strip from sticking to the concrete face.
  • Allow the glue to dry (according to manufacturer’s instructions) and then stick
        Joint former onto the glued concrete face.
  • Cast the next section of concrete as required. Take care not to let the wet concrete
        get behind Joint former as this will result in a wavy joint.
  • When the joint sealant is about to be applied, simply peel the tear-off strip out of the
        formed joint, leaving an even groove of uniform depth for filling with sealant.

    • Please Note: In conjunction with water retaining structures, Joint former must NOT be used where the water head is in excess of 3 metres.

    The correct size to be used depends on the condition of the formwork or type being used:

    JOINT FORMER PRODUCT CODES AND SIZES

    Product
    Foam
    Width
    Thickness
    Code
    Colour
    (mm)
    (mm)
    JT50
    White
    50
    10
    JT80
    White
    80
    10
    JT90
    White
    90
    10
    JT100
    White
    100
    10
    JT110
    White
    110
    10
    JT115
    White
    115
    10
    JT120
    White
    120
    10
    JT125
    White
    125
    10
    JT150
    White
    150
    10
    JT170
    White
    170
    10
    JT175
    White
    175
    10
    JT180
    White
    180
    10
    JT190
    White
    190
    10
    JT200
    White
    200
    10
    JT220
    White
    220
    10
    JT230
    White
    230
    10
    JT250
    White
    250
    10
    JT280
    White
    280
    10
    JT300
    White
    300
    10
    JT340
    White
    340
    10
    JT400
    White
    400
    10

    Joint former Lightweight, cross-linked, closed cell, expanded Polyethylene joint former

    ADVANTAGES
  • Joint former has good compression qualities with good recovery capacity.
  • Joint former is supplied with a hinged temporary blocking piece,leaving a clean, neat
        and perfectly sized groove providing a consistent depth channel for joint sealent.
  • Joint former is cut to size, eliminating wastage and cutting on site.
  • The Joint former material is flexible and can be used around corners.
  • Joint former Excellent resistance to chemicals.
  • Joint former is waterproof, does not disintegrate, rot or swell.
  • No bond breaker required.
    •
    JOINT FORMER PHYSICAL PROPERTIES / TECHNICAL DATA
    Composition:  Closed cell, cross-linked expanded \  Polyethylene.
    Colours:  White.
    Roll size:  10 meters.
    Density:  33 kg/m3 (nominal).
    Size:  Available in various sizes and thicknesses  according to requirements.
    Compression Deflection:  10 %: 36 kPa; 25 %: 61 kPa; 50 %:
     143 kPa.
    Compression-Set:  25 % 22 hr COMP. / 24 hr REC.: <6 %; 50%
      22 hr COMP. / 24 hr REC.: <20 %.
    Resistance:  Good resistance to dilute acids and alkalis.
    Flammability:  < 310 mm / min. on a 3 mm sample.
    Thermal Conductivity:  24°C: 0.037 W/m.K.
    Temperature Range:  Up to 90°C.
    Tensile Strength:  > 163 kPa.
    Elongation and Break:  >144 %.

    Also have a look at our Shutter Strip Web Page?

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    Contact us now on +27 11 310 8660 or +27 11 310 7113. You can also email us on sales@rmcs.com