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High-end defoaming + improved levelling for ultra-clean, defect-free films
FS 630 is a high-performance fluorosilicone-based defoamer supplied as a 5% active formulation, engineered for demanding electronics manufacturing fluids where foam control and surface perfection are critical. It is designed to deliver rapid knockdown, long-lasting deaeration, and improved flow/levelling in systems that commonly foam due to surfactants, agitation, spray application, ultrasonic cleaning, or high-speed mixing.
In electronic applications, FS 630 helps achieve uniform, defect-free films in conformal coatings, electronic cleaners, soldering fluxes, and related process formulations used on PCBs, connectors, sensors, and fine-pitch assemblies. The fluorosilicone chemistry provides strong activity at the air–liquid interface and excellent performance in formulations that are difficult for conventional silicone defoamers—especially where low surface tension ingredients or fluorosurfactants are present. FS 630 reduces microfoam, entrained air, pinholes, craters, and voids, while supporting smoother films and better levelling, helping improve coating reliability and cosmetic quality.
FS 630 is optimized for use in high-end electronics materials where foam or microbubbles can cause electrical leakage paths, coating discontinuity, voids in encapsulation, and defects in flux residues. Used at low dosage, it minimizes formulation disruption while improving process stability across mixing, circulation, dispensing, and application steps.
FS 630; fluorosilicone defoamer; fluorinated silicone antifoam; deaeration additive
Fluorosilicone-based defoaming agent (delivered as a 5% active composition)
Liquid dispersion / solution
5% (by weight)
Regulated as Dangerous Goods (typical; confirm from SDS)
Controls foam and entrained air during mixing and application, reducing pinholes, craters, and microvoids while improving film smoothness and levelling on PCB assemblies.
Provides fast foam knockdown in spray, circulation, and ultrasonic cleaning systems, improving process stability and reducing overflow/foam-related downtime.
Minimizes microfoam during processing and dispensing, helping reduce bubble-related defects and improving wet-out and residue uniformity.
Helps reduce surface foam and entrained air in processing steps, supporting improved deaeration and more consistent application behaviour (system dependent).
Performs well in formulations containing strong wetting agents, including fluorinated and silicone-modified additives, where traditional defoamers can struggle.
| Property | Typical Value |
|---|---|
| Composition | Soda-lime borosilicate glass |
| Particle morphology | Hollow spheres |
| True density | ~0.15 g/cc |
| Bulk density | ~0.09 g/cc |
| Crush strength (90% survival) | ~250 psi |
| Average particle size | ~50 microns |
| Thermal conductivity | Very low (air-filled structure) |
| Combustibility | Non-combustible |
| Color | White |
Fast defoaming with extended foam control to handle continuous agitation, recirculation, and dispensing.
Helps minimize craters, pinholes, microbubbles, and voids, supporting higher reliability and cleaner surface appearance.
Fluorosilicone chemistry performs strongly in difficult-to-defoam formulations, especially those containing low surface tension ingredients.
Supports smoother, more uniform films with better levelling—helpful in high-gloss or thin-film protective coatings.
Effective at low dosage due to strong interfacial activity; 5% active format helps with controlled dosing and easier handling.
Treat as an industrial specialty chemical. Avoid inhaling mists and avoid contact with skin and eyes. Use with adequate ventilation.
Safety goggles/face shield, chemical-resistant gloves (nitrile), and protective clothing. Use respiratory protection where spray mists are present.
Skin contact: Wash with soap and water; remove contaminated clothing.
Eye contact: Rinse with water for several minutes; seek medical attention if irritation persists.
Inhalation: Move to fresh air; seek medical advice if symptoms occur.
Ingestion: Rinse mouth; do not induce vomiting; seek medical attention.
Fire & decomposition – Use foam, dry chemical or CO₂ extinguishers; overheating may release irritating fumes; use SCBA in a fire situation.
Environmental precautions – Prevent release to drains and water bodies. Contain spills with inert absorbent and dispose per local regulations and the official SDS.