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  • Building Protection Water repellent additive IOTA BP 9705

    Building Protection Water repellent additive IOTA BP 9705


    IOTA BP 9705 is a non-ionic, APEO free, alkyl poly siloxane aqueous emulsion, to be used as a water repellent additive in various formulations.


    IOTA BP 9705, added at very low amount, brings water resistance and water vapour permeability.

    In coatings, IOTA BP 9705 enhances the water repellency of the films, and improves the process ability and the anti-blocking characteristics.

    Moreover its economic advantage due to its very low dosage efficiency, IOTA BP 9705 improves the dirt pick up resistance of coatings.


    IOTA BP 9705 is an additive specially designed to enhance water resistance of interior and exterior paints, silicate paints, plasters

    IOTA BP 9705 can also be used as a water repellent for construction (bricks, tiles…) and insulating materials.


    1. AppearanceMilky white

    2. Specific gravity at 25°C, approx 1.0

    3. pH, approx.7

    4. Brookfield viscosity, 23°C, mPa.s< 500

    5. Solids content, % wt, approx 50


    1. Additive for paint formulations:

    Addition levels from 0.1 to 3% of IOTA BP 9705 compared to the total formulation are typically used (addition at the end of the formulation).

    IOTA BP 9705 can also be thinned with water, around 5% of solids, for a use as water repellent primer. In such formulations, we recommend to add acrylic emulsions.

    Our technical department has made a number of tests which can serve as a basis for formulations.

    For each new formulation, compatibility between constituents, the final product and the substrate should be checked.

    2. Water repellent for insulating materials:

    IOTA BP 9705 can be used as a water repellent for construction materials. There, the solid content of dilutions will be between 0.5 to 5 %.

    IOTA BP 9705 can also be used for treatment of mineral fibres. There it has to be diluted in water down to low concentrations: 0.05 to 2%.


    IOTA BP 9705 is available in 25 kg drums, 200 kg drums and in 1000 kg containers.

    Storage and shelf life

    When stored in its original unopened packaging at a temperature between +2°C and +30°C, IOTA BP 9705 may be stored for up to 12 months from its date of Manufacture (expiry date).Comply with the storage instructions and expiry date marked on the packaging.

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