Name: Dow DOWSIL 8621 Defoamer
Brand: Guangzhou Eric Wei Chemical Co., Ltd.

Features Of Dow DOWSIL 8621 Defoamer

Highly effective silicone-based defoamer for rapid foam knockdown and long-term foam suppression.
Excellent compatibility with water-based systems, including acrylic, styrene-acrylic, and vinyl acetate emulsions.
Low dosage requirement—typically effective at 0.05–0.3 wt% active in final formulation.
Thermally stable up to 120 °C, supporting high-temperature processing conditions.
Non-yellowing and non-staining, preserving clarity and color integrity in sensitive coatings and adhesives.

Typical Applications Of Dow DOWSIL 8621 Defoamer

Architectural and industrial waterborne paints and coatings.
Adhesives and sealants, especially pressure-sensitive and latex-based formulations.
Construction chemicals, including cementitious mortars and tile adhesives.
Textile printing pastes and pigment dispersions.
Wood coatings and water-reducible varnishes.

Chemical Type	Silicone oil-in-water emulsion
Product Form	White to off-white liquid
Appearance	Opaque, slightly viscous emulsion
pH (1% aqueous dispersion)	6.0–7.5
Specific Gravity (25 °C)	1.00–1.04 g/cm³
Viscosity (Brookfield LV, 25 °C, spindle #3, 12 rpm)	500–2,500 mPa·s
Active Content	25–28 wt%
Primary Applications	Waterborne coatings, adhesives, construction chemicals, textile auxiliaries

Get in Touch with ERICW

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Contact With Us:

E-mail: wangxingqiang@ericwchem.com
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15921782326
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Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China