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

DOWSIL SM 5512 Defoamer

DOWSIL SM 5512 is a high-performance silicone emulsion designed for protective coatings in harsh environments. It appears as a milky liquid with a viscosity of 800-1,500 mPa·s, maintaining stable performance across a pH range of 6-9 and at temperatures up to 80°C. With a solid content of 50%±2%, it forms dense protective films—boasting water resistance exceeding 1,000 hours and QUV weathering resistance of ≥2,000 hours. ISO 9001 certified, it is compatible with acrylic systems and extends the lifespan of coatings by 30% in both architectural and industrial applications.

Product Information of DOWSIL SM 5512 Defoamer

  1. Excellent Weathering Resistance: Passes the 2,000-hour QUV weathering test with a yellowing index (ΔE) <1.5, ensuring long-term color and performance stability under outdoor conditions.

  2. Strong Adhesion Performance: Achieves ≥5 MPa bond strength on metal and wood surfaces, as verified by the ASTM D3359 cross-cut test, preventing coating peeling or delamination.

  3. Wide Compatibility: Works seamlessly with epoxy and polyurethane systems, avoiding compatibility issues that could lead to coating failures such as cracking or blistering.

Areas of Application of DOWSIL SM 5512 Defoamer

  1. Architectural Coatings: Used for waterproofing high-rise building facades, withstanding water pressure >0.3 MPa to prevent water seepage and protect building structures.

  2. Industrial Anticorrosion: Provides metal protection for oil pipelines, passing salt spray tests for ≥1,500 hours to resist corrosion from harsh media like saltwater or chemicals.

  3. Wood Protection: Applied as a coating for outdoor furniture, achieving Grade 0 mold resistance (per GB/T 18261-2013) to inhibit mold growth and extend furniture service life.

Specifications Of DOWSIL SM 5512 Defoamer

Type
Silicone-modified emulsion
Appearance
Milky liquid
Solid Content
50%±2%
Dynamic Viscosity
800-1,500 mPa·s
pH Value
6-9
Tack-Free Time (25°C/50% RH)
≤30 minutes
Water Resistance
>1,000 hours (no blistering)
Salt Spray Resistance
≥1,500 hours (ASTM B117)
Packaging
25kg/drum or 200kg/IBC


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