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

Elementis DAPRO DF 661 Defoamer

Elementis DAPRO DF 661 is a high-performance silicone-free defoamer from Elementis’ DAPRO DF series, engineered for rapid foam control in water-based industrial coatings, inks, and adhesives. It offers excellent compatibility, low odor, and stable performance under high shear and elevated temperatures without compromising gloss or substrate wetting.
  • elementis dapro df 661 defoamer_8dfd9464
  • elementis dapro df 661 defoamer_8dfd9464

Features Of Elementis DAPRO DF 661 Defoamer

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

  2. Excellent compatibility in water-based systems, including high-shear and high-ionic-strength formulations.

  3. Low dosage requirement ensures cost efficiency without compromising performance or clarity.

  4. Thermally stable up to 120°C, supporting processing in elevated-temperature applications.

  5. Non-yellowing and non-staining—ideal for use in clear coatings and sensitive decorative finishes.

Typical Applications Of Elementis DAPRO DF 661 Defoamer

  1. Architectural and industrial waterborne paints and coatings.

  2. Water-based adhesives and sealants.

  3. Construction chemicals, including cementitious grouts and tile adhesives.

  4. Industrial cleaning formulations and metalworking fluids.

  5. Textile auxiliaries and dyeing auxiliaries where foam control is critical during processing.

Specifications Of Elementis DAPRO DF 661 Defoamer

Chemical TypeSilicone emulsion (polydimethylsiloxane-based)
Product FormWhite to off-white opaque liquid emulsion
AppearanceHomogeneous, pourable liquid; slight opalescence
pH (1% aqueous dispersion)6.0 – 7.5
Specific Gravity (25°C)1.00 – 1.04 g/cm³
Viscosity (Brookfield RV, 25°C, spindle #3, 20 rpm)150 – 400 mPa·s
Active Content28 – 32 wt%
Primary ApplicationsWaterborne coatings, construction chemicals, adhesives, cleaning agents


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