Bluey Technologies BluSeal JS50

Flexible, adhered EPDM joint sealing membrane

BluSeal JS50 is an adhered membrane joint system used together with BluSeal AD50 to form a flexible joint sealing solution. BluSeal JS50 is an adhered, high elasticity product suitable for civil engineering applications. BluSeal JS50 incorporates resilient EPDM polymers to form a durable membrane which has high movement capacity, tolerance to extreme temperature variations and ultra-high bond capabilities in a range of applications.
  • Description


    • Carpark joints construction and repair
    • Tunnel joints and underground environments
    • Jetty construction and repair
    • Airport construction
    • Bridge repair
    • Building and roof repairs
    • Dam construction and repair
    • Concrete structures
    • Road repairs
    • Sea wall repair and maintenance
    • Abutment joint sealing


    • Easy and fast application
    • Suitable for bonding to damp surfaces
    • Solvent and silicone free
    • Odourless
    • Bonds to steel, concrete and other building surfaces
  • Performance

  • Compliances and Accreditations

  • Systems & Installation


    Primer: Project specific
    Adhesive layer: BluSeal AD50
    Joint sealing bandage: BluSeal JS50
    Adhesive 2nd layer: BluSeal AD50



    1.1 All defective host substrate must be removed prior to application. Defective material includes cracked or structurally weakened surfaces and also chloride contaminated and carbonated concrete. The surfaces shall not contain substances containing tar, as otherwise the adhesion is reduced. The application on fresh bitumen is not recommended for the same reasons. On old bitumen an adhesion can be reached of maximum 0.45 N/mm2 , as long as the surface is free of grease. A concrete corrosion expert must be consulted for critical projects or structural applications.
    1.2 Host concrete must be roughened and aggregate exposed to ensure good bond. High pressure water blasting or mechanical chipping of the surface is recommended for this purpose.
    1.3 All surfaces must be free of dust, oils and surface contaminants. This may require steam cleaning or high pressure water blasting if site conditions permit.


    2.1 For permeable surfaces and to achieve higher bond in general, please contact Bluey for a range of suitable primers.


    3.1 Placement of BluSeal AD50 can be completed using hand cartridges.


    4.1 Sealing of construction joints and control joints BluSeal AD50 adhesive is applied onto the cleaned subsurface with a manual caulking gun in loops of 15 mm thickness. Spreading the adhesive on the subsurface should be carried out with a notched trowel in a way that an even layer of adhesive of approx. 1.5 mm is applied to the substrate to be sealed.
    4.2 The BluSeal JS50 shall be thoroughly cleaned on the both sides to remove any dust or contaminates.
    4.3 The sealing membrane is then positioned on the adhesive layer and rolled into the adhesive from the centre outwards with a wide draw roll. Press down such that no air bubbles are left under the membrane but at the same time no adhesive is pressed out at the free edges. Any adhesive outside of the membrane must be removed before sealing.
    4.4 Apply second coat of BluSeal AD50 at approx 1.5mm thick, over the leading edge of the BluSeal JS50 tape.
    4.5 The BluSeal JS50 must be cut to fit the length of the joints. The long edges of the BluSeal JS50 must be bonded along the whole surface area for a width of 100 mm. The overall width of the membrane must be selected to fit the intended application.


    5.1 BluSeal AD50 cures by reaction with atmospheric moisture. The reaction starts at the surface and progresses towards the centre of the cross section. The curing speed depends on the relative humidity and the temperature. At low temperatures the water content of the air is lower and the curing reaction proceeds more slowly.

  • Compatible Products

  • Spec Clause

    Spec Clause

    EPDM JOINT SEALING MEMBRANE - The joint sealing membrane used for this project shall be an adhered membrane strip which requires only careful application to form a durable joint sealing product. It shall be prefabricated and tested to achieve the technical requirements outlined in the technical data table detailed below in accordance with the standards shown. BluSeal JS50 manufactured by Bluey Technologies or similarly performing products may be accepted for use on this project

  • Projects & Installers

    No example projects listed

  • Downloads

    Bluey Technologies BluSeal JS50

    Silane-modified polymer construction adhesive for ultra-bond civil engineering applications

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