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LaSeal 286 Fire rated Acrylic Sealant

Fireproof sealant

LaSeal 286 Fire rated Acrylic Sealant

LaSeal 286 is a grey fire retardant acrylic mastic. Tested on various widths of joints giving 1-4 hours fire resistance. Used for perimeter pointing and sealing of fire rated structures etc. Joint movement

capability of + or - 25%. kastar286 Intumescent sealant is a white sealant for indoor joints where a fire retardant seal is required to prevent the passage of fire and smoke. Joint movement capability of + or - 12.5%.


Packing information: 300ml, 310ml by plastic cartridge;

600ml sausages, 190 KGS by drum.


    ● Paintable
    ● Silicone-free
    ● Seals small openings quickly
    ● Easy to clean with water
    ● Fast, simple application and clean-up
    ● Fire Resistant up to 4 hours


    Designed to make installation quicker and easier Tested for firestopping of single cables, cable bundles and conduits Smoke-tight sealant Can be applied to concrete, masonry or gypsum

    Acoustically tested according to ISO 10140 Applications Single cables and cable bundles Conduits.

    Intumescent Acoustic Acrylic sealant 286 (4)hsr Intumescent Acoustic fire rated Acrylic sealant 286 (5)jrm

    Technical Data Sheet(TDS)

    Technology data:The following data are only for reference purpose, not intended for use in preparing specification.
    LaSeal 280 Fire rated Acrylic Sealant



    Basic material

    Acrylic Dispersion




    Smooth paste



    Specific gravity

    1,60 ± 0,03 gr/cm3

    Tack-Free time

    15-30 min (23 °C and 50%R.H)

    Curing Rate (mm/day)

    Min.2 mm/day (23 °C and 50% R.H)

    Shore A hardness

    40 ± 5 Shore A


    > 100%

    Tensile strength

    ≥ 0.4 N/mm2

    Application Temperature

    +5 °C to +40 °C

    Volume shrinkage


    Swelling Rate

    5 to 6 tims


    ● Not suitable for freezing or damp, silicone oil-containing base surface and silicone rubber.
    ● The surface of the substrate to be adhered must be clean and dry, free of dust, oil and water stains. Adhesive substrate should be used for cleaning with cleaning agent. Otherwise, it may cause bonding failure.
    ● Temperature and humidity have a great impact on the surface for drying and curing of the sealant, and the construction environment is recommended Temperature 5~35℃, humidity 50~70%RH.
    ● The node part can be modified and smoothed with a scraper or rigid foam strip, and the ground is partially modified.It can be smoothed with soapy water.
    ● For construction methods, please refer to the construction instructions or consult our technicians.

    Surface Preparation

    ● Following cleaning procedure and materials are recommended
    ● Glass Degrease with alcohol or MEK
    ● Aluminium, light alloys and stainless steel Degrease with alcohol or MEK
    ● Other Metals Lightly abrade then degrease as above
    ● Wood Lightly abrade surface then remove dust
    ● Plastics Degrease using an agent recommended by plastics manufacturer
    ● Concrete and other alkaline Surfaces Brush and remove dust


    ● Surface must be dry, clean and free from dirt oils, stains or other surface contaminants. Remove all loose materials.
    ● Always use a standard caulking gun to dispense the sealant.
    ● Caution: The use of a caulking gun is critical and highly recommended to ensure best finish and faster application.
    ● Ensure that sealant is in contact with both sides of joints and gaps. Use foam backer rods as necessary.
    ● Remove excess sealant and smooth it off with a flat knife. Applied sealant is touch dry after 30 mins. Protect from water exposure for at least 4 hours after application. Can be painted over after 2 hours.

    Storage and shelf life

    1. They should be protected from water, frost and adverse air conditions.
    2. They should be kept dry and cool on wooden pallets at between +5 degree C and +25 degree C in moisture free conditions.
    3. The opened products should be consumed immediately.
    4. Shelf life is maximum 12 months conditional to complying with the aforementioned storage conditions.