Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

Wacker SD850 Self-Dispersing Silicone Defoame

Wacker SD850 is a self-dispersing silicone defoamer from Wacker’s SILFOAM® series offering rapid foam suppression and excellent compatibility in water-based systems without requiring emulsifiers or high-shear dispersion—ideal for coatings, adhesives and industrial cleaning formulations.
  • wacker sd850 self dispersing silicone defoame_fe597b78
  • wacker sd850 self dispersing silicone defoame_fe597b78

Features Of Wacker SD850 Self-Dispersing Silicone Defoame

  1. Ready-to-use liquid formulation requiring no pre-dilution or high-shear dispersion.

  2. Excellent defoaming and long-term foam suppression in aqueous systems.

  3. Stable performance across a broad pH range (pH 4–12) and elevated temperatures.

  4. Low surface tension and rapid migration to air–liquid interfaces for fast knock-down action.

  5. Compatible with anionic, nonionic, and many cationic surfactants without destabilizing formulations.

Typical Applications Of Wacker SD850 Self-Dispersing Silicone Defoame

  1. Water-based architectural coatings and decorative paints.

  2. Industrial cleaning formulations including CIP and alkaline detergents.

  3. Textile auxiliaries such as dyeing, printing, and finishing baths.

  4. Agrochemical concentrates (EC, SC, SE formulations) and tank-mix adjuvants.

  5. Construction chemicals including cementitious mortars, grouts, and self-leveling underlayments.

Specifications Of Wacker SD850 Self-Dispersing Silicone Defoame

Chemical TypePolydimethylsiloxane (PDMS)-based silicone emulsion with hydrophobic silica
Product FormOpaque white to off-white liquid
AppearanceHomogeneous, slightly viscous liquid
pH (1% aqueous dispersion)6.0–7.5
Active Content25–27 wt.%
Viscosity (25°C, mPa·s)150–400 (Brookfield LV, spindle #3, 6 rpm)
Storage Stability≥12 months at 5–30°C in sealed container
Primary ApplicationsDefoaming in water-based industrial and coating systems


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