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The quantity of BLUESIL BP 9821 to be incorporated varies according to the required properties.
Typically, the recommended ratio is between 10% and 50% relative to the total binder (calculated dry/dry).

BLUESIL BP 9821 may be added either to the organic binder or directly during the paint formulation.

Avoid discharge into drains, water courses or onto the ground. Store in a cool, dry place with adequate ventilation. Keep away from incompatible materials, open flames, and high temperatures. Avoid contact with oxidizing agents. Suitable containers: Steel drums coated with epoxy-resin.Please consult the Safety Data Sheet of this product.RoHS;VOC


BLUESIL BP 9821 is an aqueous APE-free polymethylsiloxane resin emulsion with low VOC content.
This emulsion is designed for use in facade coatings, to optimise the balance between water repellency and water vapour permeability.

Additive;Breathability;Coating;Hydrophobing;Primer;Protection;UV resistant;Water Repellency




Combined with acrylic or styrene-acrylic dispersions, BLUESIL BP 9821 enables the formulation of coatings with high water vapour permeability and high liquid water resistance, notably below the cPVC.
In matt systems with high porosity (PVC > cPVC), BLUESIL BP 9821 allows an excellent water repellency (the use of a silicone additive is not necessary) and high wet scrub resistance.

Asia Pacific;Europe Middle East Africa;Central and South America;North America

For information about Storage and Shelf Life for this product, please download the Technical Data Sheet.




Viscosity< 500MonocompmPa.s
Dry content60MonocompASTM D 5095%
pH10.5MonocompISO 976























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