IR-825 Silicone Surface Additive (equivalent to BYK-325)


IR-825Polyether modified polymethyl alkyl siloxane solution (equivalent to BYK-325)

Typical Properties

Density at 20°C, g/mlNon-volatile matter, %Flashpoint, °C
Solvents: alkylbenzenes/butyrolactone 1/1
These properties are provided as typical properties. NOT THE PRODUCTS TECHNICAL INDEX.

Proposed Dosages

Dosage based upon inorganic pigments, %


These additives provide a slight reduction in surface tension of paint systems, which thus improve flow and leveling and display partial defoaming properties. Additionally, they prevent “Bénard Cell” formation.


Solvent-borne coatingsAqueous coatings

Addition Methods&Process Technology Instructions

These additives can be added during any production process, including post-addition.

Special Features

IR-825IR-825 prevents ghosting (wipe-marks) if recoated with the same paint. It neither causes rewetting problems nor influences recoatability.


Packed in iron drums of 25 or 200kg net each. The validity period is 12 months in sealed containers.

Special Notes

IR-825Products may become solid if the temperatures below 15°C.
Heat up to <50°C and mix well before use.