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.

BLUESIL BP 9821 may be stored at temperatures between 2°C / 36°F and 30°C / 86°F for up to 12 months from its date of manufacturing.Please consult the Safety Data Sheet of this product.


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




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

























Energy Efficient Buidlings Efficient Buidlings












Solutions for building protection for building protection