Shanghai Semitech New Material Co., Ltd.
1628 Lijing Road, Lingang New Area, 200000, Shanghai, China.
Mobile:
+8615639100440
Email:
info@semitechnm.com
Silicone Fluid & Emulsion Applications: Textiles, Release & Personal Care
Silicone Fluids Specialty Chemicals 2026
Silicone Fluid & Emulsion Applications:
Textiles, Release & Personal Care
Silicone fluids span viscosities from 0.65 to 100,000 cSt and perform across an extraordinary range of applications — from imparting silky softness to polyester fabrics to enabling clean release of complex composite mold geometries. This guide maps silicone fluid types to their key industrial applications.
Contents
- Fluid Types
- Textile Softening
- Mold Release
- Personal Care
- Lubrication & Heat Transfer
- Viscosity Selector
- Related Products
- FAQ
Quick Specs
Viscosity0.65–100K cSt
Flash Point>300°C (PDMS)
Temp Range–50–200°C
Surface Tension~21 mN/m
Refractive Index1.400–1.404
Silicone Fluid Types
Silicone fluids share a polysiloxane backbone (–Si–O–Si–) that gives them exceptional thermal stability, low surface tension, chemical inertness, and a wide liquid range — properties no hydrocarbon oil can match across such a broad temperature window.
| Type | Key Feature | Primary Applications |
|---|---|---|
| PDMS (Dimethicone) | Inert, stable, hydrophobic | Mold release, lubrication, defoaming, personal care |
| Amino Silicone | Fiber-substantive, soft feel | Textile softening, hair conditioners |
| Hydrogen Silicone (Si–H) | Reactive cross-linker | Surface treatment, silicone rubber cross-linking |
| Vinyl Silicone | UV/peroxide curable | Silicone rubber base, release coatings |
| Silicone Emulsion | Water-dilutable, easy apply | Textile finishing, paper release, wax blends |
| OH Polymer (Silanol) | Reactive end groups | Sealant crosslinker, surface modification |
Textile Softening & Finishing
Amino-modified silicone fluids are the dominant textile softener worldwide, delivering the silky, smooth, and luxurious hand feel demanded by modern apparel consumers on polyester, nylon, cotton, and wool substrates.
Applied by pad, exhaust, or spray at 0.5–3% active on weight of fabric (owf), amino silicone emulsions deposit a thin, oriented film on fiber surfaces. The amine groups anchor to fiber hydroxyl and carboxyl sites, creating a durable, wash-resistant silky layer that reduces inter-fiber friction and enhances drape.
Polyester & Nylon
Amino silicone at 1–2% owf gives outstanding silky hand feel and improved tear strength retention after laundering.
Cotton & Cellulosics
Hydrophilic amino silicone grades maintain moisture wicking while adding softness — important for athletic and baby garments.
Wool & Protein Fibers
Low-amine-value silicone emulsions soften wool without compromising felting behavior or dyeing uptake.
Technical Textiles
PDMS emulsions applied to nonwovens, airbags, and upholstery fabrics improve abrasion resistance and reduce noise.
Formulation note: Block or linear amino silicone emulsions offer different hand-feel profiles. Linear types give a slippery silk feel; block amino types give a fuller, drier feel preferred in luxury shirting and suiting fabrics.
Mold Release & Demolding
PDMS silicone fluids at 100–10,000 cSt are classic external mold release agents for rubber, polyurethane foam, epoxy, and composite molding. Applied by spray, wipe, or brush to mold surfaces, they form a boundary lubricant layer that prevents adhesion between part and mold without contaminating the part surface.
| Mold Application | Recommended Viscosity | Application Method | Key Property |
|---|---|---|---|
| Rubber molding (technical) | 350–1000 cSt | Spray diluted in solvent | Heat stability >180°C |
| PU foam | 50–350 cSt | Spray neat or in carrier | No silicone migration |
| Epoxy composites | 500–5000 cSt | Wipe-on thin film | Low transfer to part surface |
| Food baking molds | 350 cSt, FDA grade | Spray or brush | FDA 21 CFR 178.3570 compliance |
| Die casting (Zn/Al) | 10,000–100,000 cSt | Diluted emulsion spray | Thermal stability, thin film |
Note: Silicone mold release agents can cause adhesion failures if used in areas intended for subsequent painting or bonding. Mask or use non-silicone release in those zones.
Personal Care & Cosmetics
Low-viscosity PDMS (0.65–50 cSt) and cyclomethicone provide the characteristic silky slip and gloss in hair serums, skin creams, sunscreens, and color cosmetics. Higher-viscosity dimethicone (200–1000 cSt) acts as an emollient and film former in leave-on hair and skin treatments.
Amino silicone is the active ingredient in premium hair conditioners and hair treatment serums — its substantivity to damaged hair cuticle proteins delivers lasting smoothness and detangling benefits that wash out slowly over multiple shampoos.
Regulatory note: D4 and D5 cyclic silicones are under EU REACH restriction for rinse-off personal care products. Formulators targeting EU markets should use linear PDMS alternatives or obtain compliance documentation from their silicone supplier.
Lubrication & Heat Transfer
High-viscosity PDMS (10,000–100,000 cSt) is used as a lubricant in applications where hydrocarbon oils would oxidize, gel, or evaporate: high-temperature ovens, automotive door seals, medical device moving parts, and electrical switch contacts. Its oxidative stability extends service intervals dramatically compared to mineral oils.
Medium-viscosity PDMS (500–5000 cSt) serves as a heat transfer fluid in constant-temperature baths, thermal processing equipment, and cosmetic industry mixing vessels, operating reliably from –50°C to 200°C without boiling or freezing.
Viscosity Selector
| Viscosity (cSt) | Flow Character | Typical Use |
|---|---|---|
| 0.65–10 | Water-thin | Carrier solvent, light defoamer, volatile personal care |
| 50–200 | Light oil | Textile emulsion base, light mold release, hair serum |
| 350–1000 | Medium oil | General mold release, skin emollient, light lubrication |
| 1000–5000 | Heavy oil | Heat transfer, composite mold release, electrical insulation |
| 10,000–100,000 | Viscous | Damping fluid, high-temp lubrication, rubber compounding |
Not sure which grade? Browse our silicone fluid range or contact Semitech’s technical team with your application temperature range, substrate type, and method of application.
Related Products
Silicone Fluids & Emulsions
Full range of PDMS and functional silicone fluids for all applications.
Browse Products → MESIL Hydrogen Silicone Fluid
Si-H functional silicone for crosslinking and surface treatment applications.
View Product → MESIL EM Silicone Emulsions
Aqueous silicone emulsions for textile finishing, paper release, and surface treatment.
View Product → Textile Amino Silicone
Amino-modified silicone oils and emulsions for fabric softening and finishing.
View Product → Vinyl Silicone Fluid
Vinyl-functional PDMS for silicone rubber base polymer and reactive coatings.
View Product → Frequently Asked Questions
What viscosity of silicone fluid is best for textile softening?
Amino-modified silicone fluids at 50–500 cSt applied as dilute aqueous emulsions (0.5–3% active) are standard. Lower viscosities (50–100 cSt) give a lighter, more fluid hand feel; higher viscosities (200–500 cSt) impart a fuller, silkier feel. Amine value governs substantivity — higher values give stronger fiber bonding and more wash-durable softness.
What is the difference between PDMS, hydrogen silicone fluid, and amino silicone?
PDMS (polydimethylsiloxane) is chemically inert and thermally stable, used for lubrication, defoaming, and release. Hydrogen silicone fluid (Si-H functional) is a reactive intermediate for crosslinking and surface treatments via hydrosilylation. Amino silicone has amine side groups that bond substantively to fibers, making it the primary choice for textile softening.
How do silicone emulsions differ from neat silicone fluids?
Silicone emulsions are aqueous dispersions containing 30–60% active silicone stabilized by surfactants. They are water-dilutable and applied by pad, spray, or exhaust without organic solvents. Neat silicone fluids are 100% active and used where solvent-based application or maximum silicone content is required, such as high-temperature mold release.
Can silicone fluids be used as mold release agents?
Yes. PDMS at 100–1000 cSt applied as thin films to mold surfaces prevents adhesion of rubber, PU, epoxy, and composite parts. FDA-compliant grades are available for food-contact molds. High-temperature molds benefit from higher-viscosity grades that resist burnoff at processing temperatures above 180°C.
Are silicone fluids safe for use in cosmetics and personal care?
Yes. PDMS, dimethiconol, and amino silicone are non-comedogenic and non-irritating, widely approved for cosmetic use globally. D4 and D5 cyclic silicones are under EU REACH restriction for rinse-off products; formulators targeting EU markets should use linear PDMS alternatives or confirm compliance with their supplier.
Technical data is indicative. Contact Semitech for product-specific TDS on MESIL and MESIL EM silicone fluid grades. Regulatory references are current as of April 2026.