IR-823 Silicone Surface Additive with Slight Reduction of Surface


IR-823 Aralkyl modified polymethyl alkyl siloxane

Typical Properties

Acid value, mg KOH/g Density at 20°C, g/ml Non-volatile matter, % Flashpoint, °C
IR-823 129 0.99 >96 >100
These properties are provided as typical properties. NOT THE PRODUCTS TECHNICAL INDEX.

Proposed Dosages

Dosage based upon inorganic pigments, %
IR-823 0.05-0.6
The above-recommended dosages strongly depend on pigment particle size. Optimal dosages should be calculated in the laboratory according to a different formula.


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 coatings Aqueous coatings
IR-823 Recommended

Addition Methods&Process Technology Instructions

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

Special Features

IR-823 – IR-823 defoaming effect (i.e., no or only slight foam stabilization) depends on the polarity of the paint system. It is heat resistant up to 250°C and does not decrease inter-coat adhesion when overcoated.
– Inwood and furniture coatings, IR-823 is used to orient the flatting agent in flat topcoats and in multi-coat systems.
– IR-823 cannot increase shine even in polyurethane, acid curing, and unsaturated polyester coatings, then the optimal orientation of the flatting agent can be achieved.
– Inflow coat systems, IR-823 provides a stable curtain.
– In industrial coatings, IR-823 supports the orientation of flatting agents and aluminum flakes in metallics paints.


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