Siniat Joint Filler 12.5kg Bag

Siniat Joint Filler 12.5kg Bag

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    Additional Info

    Product Code:
    • Speak to an insulation expert:
      Get in touch with us over our LIVE CHAT or 02038839057
    • Application:
      Designed for stage 1 of the taping and jointing process, bedding and filling plasterboard joints
    • Type:
      gypsum based joint compound
    • Product Size:
    • Estimated Delivery:
      2-3 Working Days

    Product Description

    Siniat Joint Filler 12.5kg Bag

    Siniat Joint Filler 12.5kg Bag

    Siniat Joint Filler is a gypsum based joint compound designed for stage 1 of the taping and jointing process, bedding and filling plasterboard joints.

    Tehcnical Performace 

    Weight: 12.5mm

    Usage: Jointing

    Appearance: White powder

    Composition: Calcium sulphate with limestone, binders and aggregates. 

    Compliance: Siniat Joint Filler complies with EN 13963: 2005 Type 3B


    - High quality professional joint filler for bedding and filling 

    - Easy mixing 

    - Low shrinkage 

    - Consistent setting time 

    - Also suitable for bedding corner protection

    - For stage 1 of the taping and jointing process

    - Available to buy direct online

    Physical Properties / Product Performances

    Working Time*: 60 mins

    Setting Time*: 90 mins

    Min. Working Temperature: 5°C

    Max. Working Temperature: 40°C

    Shelf Life: 9 Months

    Reaction to Fire: A1

    Coverage per bag*: 25m2**

    * Values are approximate and dependent on workmanship and environmental conditions

    **Area of the board covered by applying compound for tape bedding


    - Use in accordance with British Standards codes of practice BS 8212:1995 and BS 8000-8:1994 workmanship.

    - Hand application only.

    - Do not apply setting compounds over air-drying compounds.


    Plasterboard surfaces should be reasonably clean and dry. Boards should be fully secured, and any proud fixings should be driven plumb with a hand screwdriver, prior to taping and jointing.


    Combine Siniat Joint Filler with the required amount of water in a clean container. Mix until a smooth workable consistency is achieved.

    Excessive mechanical mixing should be avoided, and low speed mixers should be used. Allow the compound to stand for 3-4 minutes and check the consistency with a hand trowel before use. Once the material starts to set it must be used quickly or discarded, it cannot be remixed. Contamination from previous mixes can shorten the setting time and reduce the strength of the product once set. 

    Application onto the board joint

    Apply Siniat Joint Filler to the joint, embed GTEC Joint Tape and immediately overcoat to fully fill the tapered edge boards. Ensure product is set before applying the finishing coats with Siniat Joint Cement or Siniat Deco Joint Cement (for Siniat Megadeco Board).

    If you have questions about Siniat Joint Filler 12.5kg Bag please call us on 02038839057! You can also text us back in our live chat.

    Please find all datasheets in PDF & BROCHURES section.

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    Siniat Joint Filler 12.5kg Bag

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    When you order from, you will receive a confirmation email. Once your order is shipped, you will be emailed the tracking information for your order's shipment. You can choose your preferred shipping method on the Order Information page during the checkout process.

    The total time it takes to receive your order is shown below:

    The total delivery time is calculated from the time your order is placed until the time it is delivered to you. Total delivery time is broken down into processing time and shipping time.

    Processing time: The time it takes to prepare your item(s) to ship from our warehouse. This includes preparing your items, performing quality checks, and packing for shipment.

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    Please note that not all products will incur an additional delivery charge to the Scottish Highlands & the Islands – this is based on the costs from the manufacturer, distributor or courier providing shipping on our behalf. If your delivery address is in the Scottish Highlandsand Islands, a member of our helpline team will contact you prior to processing your ordershould an additional delivery charge apply.

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    Size Chart