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

​DOW DOWSIL GP-7070 Defoamer

DOW DOWSIL GP-7070 is a high-performance powdered silicone defoamer designed for cement-based superplasticized dry-mix formulas. With optimized thermo-mechanical properties, it lowers bubble porosity by >35% in concrete and mortar, boosting 28-day compressive strength by 15% and ensuring surface smoothness (Ra ≤3 μm). Certified by ISO 9001, this free-flowing powder (D50≤150 μm) performs stably at pH 8-14 and ≤150°C, and improves production line efficiency by 20% via compatibility with direct dry blending.

Product Information of DOW DOWSIL GP-7070 Defoamer

  1. Excellent Powder Fluidity: Angle of repose <30° enables clog-free feeding in screw conveyors (≥5 m³/h).

  2. Strong Alkali Resistance: Maintains >95% defoaming efficiency in pH 14 cement slurry (per ASTM C185).

  3. Reliable Thermal Stability: Retains full activity at 150°C curing, perfect for autoclaved precast components.

  4. Enhanced Workability: Cuts fresh concrete viscosity by 15% to improve pumping performance.

  5. Eco-Friendly Compliance: Contains zero VOC and meets GB 18582-2020 construction material standards.

Areas of Application of DOW DOWSIL GP-7070 Defoamer

  1. Precast Concrete: Controls bubbles in 80-150°C steam-cured beams and slabs.

  2. Self-Leveling Mortars: Eliminates trowel marks, achieving Ra ≤3 μm surface finish.

  3. Gypsum Board Production: Reduces core void ratio to <5% during slurry casting.

  4. UHPC: Boosts flexural strength by 12% in nano-silica systems.

  5. Dry-Mix Waterproofing: Delivers ≥1.2 MPa anti-seepage pressure in coatings.

Specifications Of DOW DOWSIL GP-7070 Defoamer

Type
Powder silicone defoamer
Appearance
White free-flowing powder
Active Content
Polydimethylsiloxane + hydrophobic silica (60%)
Particle Size (D50)
≤150 μm
pH Range
8-14
Thermal Stability
≤150°C (>90% activity retention after 24h)
Bulk Density
0.45-0.55 g/cm³
Recommended Dosage
0.1-0.5% (by total dry mix weight)
Shelf Life
720 days (sealed, <25°C)
Packaging
20kg/moisture-proof bag or 500kg/tote


Get in Touch with ERICW
Let competitive chemical materials go global.

Your Name *

Your Email *

Your Phone

Country

Your Message *