IR-108 Organic Silicon Surface Additive (equivalent to BYK-306)


IR-108Polyether-modified polydimethylsiloxane solution (equivalent to BYK-306).

Typical Properties:

Density at 20°C g/mlNon-volatile matter %Flashpoint °C
Solvents: xylene /ethylene glycol monophenyl ether 7/2
This property is provided as typical property. Not the product technical index.

Proposed Dosages:

Dosage based upon total formulation, %
The above-recommended dosages strongly depend on pigment particle size. Therefore, the laboratory should calculate optimal dosages according to different formulas.

Addition Methods&Process Technology Instructions:

These additives can be added during any production stage, including post-addition. To add convenience (especially with IR-133), auxiliaries can be diluted by a suitable solvent at first.


These additives strongly reduce the surface tension of paint systems, especially to improve substrate wetting and avoid cratering. Additionally, surface slip and gloss are increased.

Compared to silicone oils, these additives are used friendly. However, please test the foam stability through experiments before use. In addition, it is also necessary to assess its recoatability and shrinkage cavity tendency.


Solvent-borne systemsSolvent-free systemsAqueous systems

Special Features:

IR-108It is a highly effective silicone additive for wetting critical substrates. It can improve the acceptance of dust and spray dust, forming a thicker film in the vertical plane. IR-108 can reduce the air sensitivity of wood and furniture coatings. It also improves flatting agent orientation.

Packing and Storage:

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

metal drum

Special Notes:

IR-108Separation or turbidity may occur if the temperatures are below 5°C.