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


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

Typical Property

Density at 20°C g/ml Non-volatile matter % Flashpoint °C
IR-108 0.93 12.5 25
Solvents: xylene /ethylene glycol monophenyl ether 7/2
This property is provided as typical property. NOT THE PRODUCTS TECHNICAL INDEX.

Proposed Dosages

Dosage based upon total formulation, %
IR-108 0.1-0.5
The above-recommended dosages strongly depend on pigment particle size. Optimal dosages should be calculated in the laboratory 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 provide a strong reduction in 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 a series of experiments before use. In addition, it is also necessary to assess its recoatability and shrinkage cavity tendency.


Solvent-borne systems Solvent-free systems Aqueous systems
IR-108 Recommended Suitable Suitable

Special Features

IR-108 IR-108 is a highly effective silicone additive for wetting critical substrates. It can improve the acceptance of dust and spray dust, and form 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 or 200kg net each. The validity period is 12 months in sealed containers.

Special Notes

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