Introduction
With accelerated domestic production of waterborne coatings and eco-friendly printing inks, the industry faces universal pain points: heavy reliance on imported high-end silicone defoamers, volatile pricing and long delivery cycles. After mass production verification by numerous coating and ink manufacturers, WynCoat® SD-3165 delivers overall performance comparable to industry benchmark Dow Corning DC65. It serves as a high-cost-performance domestic replacement that satisfies three core demands: efficient defoaming, low crater risk and stable supply.
Dow Corning DC65, a classic waterborne silicone defoamer, is widely applied in waterborne wood coatings, packaging inks and acrylic emulsions, renowned for fast microbubble elimination and oil-free film surfaces. However, fluctuating overseas supply chains, surging import costs and long lead times of 15–45 days force manufacturers to test domestic alternatives, which commonly cause craters, fish eyes, short foam suppression duration and impaired gloss, making direct replacement of DC65 formulations impossible.
Manufactured via modified silicone composite emulsification, SD-3165 combines powerful silicone defoaming and high compatibility of non-silicone additives to replicate the performance of DC65 accurately. It is a uniform milky white emulsion with stable 50% solid content and viscosity ranging from 1000–3000 cp. Its dynamic foam breaking and long-term foam inhibition performance match DC65, drastically reducing defects such as pinholes, craters and haze on coating films. Formulations can be switched seamlessly without major adjustments to resin or pigment slurry ratios.
Five Core Advantages of SD-3165 vs. Dow Corning DC65
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Equivalent overall performance for direct formula conversion
Balances instant foam breaking and persistent foam suppression with outstanding microbubble capture capacity, compatible with all waterborne latex systems including acrylic, EVA, alkyd and PU. Sprayed wood varnishes and flexo printing inks form smooth, transparent films without gloss loss or haze. It eliminates compatibility flaws common to generic domestic defoamers and enables direct replacement of DC65.
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Low dosage & high stability with higher production tolerance
Recommended dosage of 0.05%–0.4%, consistent with DC65’s usage range. The emulsion boasts excellent storage stability, remaining non-layered and free of precipitation across pH 3–11 with no performance failure after hot-cold cycling. Suitable for continuous mass production of latex paints, waterborne adhesives and leather finishes.
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Low crater & low oil migration, ideal for high-gloss topcoats
Optimized emulsification system minimizes silicone migration and film defects that plague ordinary silicone defoamers. Perfect for high-gloss wood coatings and premium packaging inks with strict appearance requirements, significantly boosting finished product yield.
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Eco-compliant for domestic & overseas sales
APEO-free and low-VOC, complying with China’s national coating standards and EU REACH regulations. Safe for furniture export coatings and food-contact packaging inks, eliminating environmental testing risks of imported additives.
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Local mass production guarantees stable supply & lower costs
25kg and 200kg stock available year-round for fast delivery. It cuts overall procurement costs compared with original DC65, with prominent cost-saving benefits for mass production. Free sample provision and on-site defoaming testing technical support are offered.
Mass Production Customer Feedback
A technical director from a Zhejiang waterborne wood coating manufacturer shared: “Our factory previously used Dow Corning DC65 across all production lines, yet frequent price hikes and stockouts occurred in recent years. After three consecutive months of mass trial production with SD-3165, primer, topcoat and clear coat spraying generates no pinholes or craters. Its defoaming speed and film texture show no obvious difference from imported DC65, so we have fully switched to this product.”
Industry Application & Market Outlook
The market for eco-friendly waterborne coatings and inks continues to expand in 2026, and domestic substitution of additives has become a mainstream industry trend. Industry surveys indicate over 70% coating and printing enterprises seek alternatives to imported defoamers like DC65, yet most existing substitutes only fit low-end latex paints and fail to meet strict appearance standards for wood coatings and high-grade inks.
SD-3165 fills the market gap for stable mid-to-high-end waterborne silicone defoamer alternatives matching DC65’s core application scenarios. It resolves supply chain instability and high costs of imported additives, empowering downstream manufacturers to achieve self-controllable supply chains.
Free sample applications and performance comparison test reports are available nationwide for coating, ink and furniture manufacturers. A professional technical team provides on-site formula optimization and defoaming process debugging services.
