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.
Excellent Powder Fluidity: Angle of repose <30° enables clog-free feeding in screw conveyors (≥5 m³/h).
Strong Alkali Resistance: Maintains >95% defoaming efficiency in pH 14 cement slurry (per ASTM C185).
Reliable Thermal Stability: Retains full activity at 150°C curing, perfect for autoclaved precast components.
Enhanced Workability: Cuts fresh concrete viscosity by 15% to improve pumping performance.
Eco-Friendly Compliance: Contains zero VOC and meets GB 18582-2020 construction material standards.
Precast Concrete: Controls bubbles in 80-150°C steam-cured beams and slabs.
Self-Leveling Mortars: Eliminates trowel marks, achieving Ra ≤3 μm surface finish.
Gypsum Board Production: Reduces core void ratio to <5% during slurry casting.
UHPC: Boosts flexural strength by 12% in nano-silica systems.
Dry-Mix Waterproofing: Delivers ≥1.2 MPa anti-seepage pressure in coatings.
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 |
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E-mail: wangxingqiang@ericwchem.com
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