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EZE-FLEX Closed Cell Polyethylene Fillerboard

Photo of Eze-Flex in roll form with the zipped-cut opening

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Product Description

CORKJOINT EZE-FLEX Closed Cell Polyethylene Fillerboard is a closed cell, crossed linked, non-absorbent polyethylene expansion joint filler board, similar to  Jointflex®, for use in expansion and isolation joints in concrete and masonry structures. Eze-Flex is non-absorbent and has excellent properties allowing it to be used in water retaining / excluding structures where, potable, salt, chlorine and sewerage water is present.

As its name would suggest, it is easy to install as it comes in roll form to suit the depth or thickness of the concrete substrate that it is to be applied to and comes with a 10mm tear off cap to suit the joint sealant application.

Eze-Flex is available in standard 25kg/m³ density and can be custom produced with a self-adhesive back on one side for easy adhesion to the first pour of concrete.


  • Non-absorbent.
  • Lightweight & durable.
  • No bitumen content.
  • Ability to compress and recover.
  • Non-extruding from joint movement.
  • Suitable for submerged or trafficable joints.
  • Durable

Areas of Application

  • Slab on ground
  • Brickwork and blockwork
  • Reinforced concrete structures
    Concrete roads and pavements
  • Suspended Slabs
  • Basements and tunnels
  • Water retaining / excluding structures
  • – Dams and reservoirs

Note : The product’s design and performance, its intended use, installation and final confirmation and approval for use, must be provided by the project’s Design Engineer and Project Manager.

Available Sizes

Eze-Flex is available in roll form of 75, 100, 125, 150, 200, 250 & 300mm high and special custom sizes are also available. Roll length are in 25 metres and available in thicknesses of 10, 12, 15, 20 & 25mm. The 10mm thickness product comes with a 10mm zipped cut on top for easy removability for future joint sealant placement. Eze-Flex also available in sheet sizes 2m x 1m. Eze-Flex rolls are also available with a self-adhesive back on one side. Eze-Flex stock standard density is 25kg/m³.

Physical Properties



Typical Applications


Typical Installations

Jointflex® is cut to size from sheets with a sharp retractable blade and adhered to the first concrete structure by a contact adhesive. Adhesive is applied directly to the Jointflex® in 50mm diameter ‘spots’ @ 300mm centers (approximately) or as required. Also refer to our installation method, available upon request

Written Specification

Where shown in the Brochure drawings, the expansion joint fillerboard shall be Eze-Flex, closed cell polyethylene fillerboard material, with a minimum density of 25kg/m³, as supplied by CORKJOINT. The fillerboard must also be supplied with a factory pre-cut, zipped top, to a minimum depth of 10mm to aid in easy and clean removal for easy joint sealant application. The application/installation of the product must be in accordance with the manufacturer’s recommendations.

Health and Safety Information

For further information or advice on health and safety precautions, safe handling, storage and correct disposal of products, please refer to the most recent product Safety Data Sheet (SDS), which is available upon request. 


The information and the recommendations relating to the application and end use of this product are given in good faith and are based on the information provided by the manufacturer of the product and/or the Company’s current knowledge and experience in connection with the product when properly stored, handled and applied under normal conditions and no liability of final function at the job site is assumed. In practice, the differences in materials, substrates and actual site conditions are such that no warranty in respect of merchantability of, or fitness for, particular purpose, nor any liability arising out of any legal relationship whatsoever, can be inferred either from this information, or from any written and/or oral recommendations, or from any other advice offered by the Company. The Company also has no express or implied knowledge of any particular purpose for which the product is required and any such information given will not be taken into account in the supply of this product. No responsibility or liability by the Company will be accepted for misuse, misreading or derivation from recommended guidelines in respect of this product and the user shall determine the suitability of the product for his intended use and assume all risks and liability in connection therewith. The information contained in our brochure may change at any time without notice. Any use of this product, EZE-FLEX Closed Cell Polyethylene Fillerboard, in any application should be approved as suitable for use/application by the Design Engineer and Project Manager.