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  • IOTA990 silicone structural sealant

    IOTA990 silicone structural sealant


    Product Description:

    IOTA990 silicone structural sealant is a medium and high modulus, neutral room temperature curing silicone elastomer sealant specially designed for structural assembly. It reacts with moisture in the air to form an elastic rubber. It has excellent weather resistance and is resistant to sunlight, rain, snow, and ozone, and does not cause adverse effects even under extreme temperature conditions (-40 to 150 ° C).Technical indicators:


    The following data is for reference only and is not recommended for use in developing specifications:

    Number

    Project

    Technical indicators

    1

    droop

    portraitmm

    ≤3

    Horizontal placement

    Not deformed

    2

    extrudabilitys

    ≤10

    3

    Dry time, min (temperature 25 C, relative humidity 50%).

    30~60

    4

    hardness

    30~60

    5

    Tensile bonding properties

    Tensile bond strength MPa

    Standard condition

    ≥0.60

    90℃

    ≥0.45

    -30℃

    ≥0.45

    After immersion

    ≥0.45

    Water - after UV light

    ≥0.45

    Bond failure area%

    ≤5

    Elongation at maximum tensile strength at 23 ° C /%

    ≥100

    6

    Heat aging

    Thermal weight loss

    ≤10

     Meet the 20HM requirements of the GB/T23261-2009 standard.


    Dosage:

    The required amount of sealant for each size interface (300 ml) IOTA990 acid silicone sealant construction length (m) 

    Depth/mm

    Width / mm

    6

    9

    12

    15

    20

    25

    6

    8.5

    5.7

    4.2

    3.4

    2.4

    2

    9

    3.8

    2.8

    2.3

    1.7

    1.4

    12

    2.1

    1.7

    1.3

    1.0

    The actual amount of sealant will vary depending on the interface design, the location of the gasket material, the finishing technique, and the amount of wear on the job site.


    Main features:

    1. Neutral curing, non-corrosive.
    2.  Forming a strong and elastic silicone rubber after curing, which will not cause significant changes due to aging and exposure to the  atmosphere.
    3. For most building materials such as glass, coated glass, anodized aluminum, granite and painted metal,
    Excellent adhesion without the use of a primer.
    4. The sealant still maintains water and weather resistance.
    5. Single component, easy to construct.


    Basic use:

      1. For edge composite caulking agent.
      2. Structural glass curtain wall.
      3. Manufacture of multi-layer insulating glass.

    Use restrictions:
      
    1. All materials that will bleed out grease, plasticizers or solvents, such as oil-impregnated wood, oil-bottomed steel seams and some unvulcanized.Or partially vulcanized rubber lining and tape.
      2. Locations that are not ventilated (silicone gels need to be cured by moisture in the atmosphere).
      3. When the surface temperature of the material exceeds 50 °C.
      4. Frost the wet surface.
      5. Under the ground, the place is wet all year round.
      6. Continuous immersion in the environment.
      7. The surface to be painted is required because the paint will crack or peel off.
      8. Will directly touch the surface of the food.
      9. Places subject to wear or physical damage.

    Color and packaging:
      Non-dangerous goods, please store in a cool dry place below 27 °C, valid for 12 months.
      Available in black, packaged in 300ML plastic hose or 590ML aluminum film.

    Construction method:

    1. Remove all grease, dust, moisture, surface dirt, old sealant, assembly accessories and protective coatings and other contaminants left in the interface and assembly recess. Glass. Metal must be cleaned with solvent according to two cloth cleaning methods. The selected solvent is xylene or methyl ethyl ketone solvent.
    2. Install gasket material or interface filler, pad spacer and tape as required. The LZ990 silicone structural sealant is continuously squeezed in and filled up the interface. When the sealing surface has not been skinned, the sealant is flattened to the gasket material and the interface surface with an appropriate force. The finishing process must be done after the sealant is applied and before the surface of the glue has not been skinned. It is recommended to use a convex tool to hold the rubber surface into a concave shape. Do not use soap and water as an auxiliary material for dressing. Immediately after the trimming is completed, the cover will be torn off. In the case of outdoor temperatures as low as -25 ° C, the building silicone sealant can still be extruded on a clean dry and frost-free surface, uncured sealant is absolutely not allowed and non-abrasive surface, such as polishing Marble, metal or glass contact, because these excess sealants cannot be completely removed with organic or chlorinated solvents, so these surfaces must be covered or extra care must be taken before applying the sealant to prevent sealants from these surfaces. Contact, once the uncured sealant contacts these surfaces, it will leave a film on the surface that will affect the aesthetically pleasing surface of the substrate, if not noticed, the uncured sealant and When the surface of the interface is in contact with the surface, it must be removed with toluene, xylene or methyl ethyl ketone solvent before the sealant has been cured. When using a flammable solvent, special precautions should be observed.
    3. It is recommended to carry out curing in a high temperature and humidity environment to facilitate the deep curing of the sealant.



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