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

Dow DOWSIL 7 Defoamer

Dow DOWSIL 7 Defoamer is a high-performance silicone-based antifoam agent from Dow’s DOWSIL specialty silicones portfolio. Designed for demanding industrial processes, it rapidly breaks foam and suppresses re-foaming in aqueous systems like coatings, adhesives, and cleaning formulations. Its low-usage efficiency, excellent compatibility, and thermal stability make it ideal for continuous and batch operations across diverse chemical manufacturing applications.
  • dow dowsil 7 defoamer_cb5376ff
  • dow dowsil 7 defoamer_cb5376ff

Features Of Dow DOWSIL 7 Defoamer

  1. Highly effective silicone-based defoamer for rapid foam knock-down and long-term foam suppression.

  2. Excellent compatibility with water-based systems, including latex, emulsions, and aqueous coatings.

  3. Low dosage requirement—typically effective at 0.01–0.10% w/w in finished formulations.

  4. Thermally stable up to 150 °C, supporting high-temperature processing conditions.

  5. Non-staining and non-silicon-spotting in sensitive applications such as architectural paints and adhesives.

Typical Applications Of Dow DOWSIL 7 Defoamer

  1. Architectural and industrial waterborne paints and coatings.

  2. Adhesives and sealants, especially acrylic and styrene-butadiene (SBR) emulsions.

  3. Textile auxiliaries, including dyeing, printing, and finishing baths.

  4. Construction chemicals such as cementitious mortars and tile adhesives.

  5. Agrochemical formulations, including suspension concentrates (SC) and emulsifiable concentrates (EC).

Specifications Of Dow DOWSIL 7 Defoamer

Chemical TypeDimethylpolysiloxane-based emulsion
Product FormWhite to off-white liquid emulsion
AppearanceOpaque, milky, homogeneous liquid
pH (1% aqueous dispersion)6.0–8.0
Specific Gravity (25 °C)0.98–1.02 g/cm³
Solids Content25–28% w/w
Viscosity (Brookfield LV, 25 °C)100–300 mPa·s
Storage Stability≥12 months at 5–30 °C in unopened container


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