Viscosity Guide · Application Selector
Find the Right Silicone Fluid for Your Application
Every viscosity range serves a different set of industrial needs. Match your application to the correct Lyson PDMS grade — or tell us your use case and we'll recommend.
Page Guide
Lyson's Complete Silicone Fluid Portfolio
This page covers Lyson's full silicone fluid offering, organized into four product families. Each section opens with a complete product catalog showing CAS numbers and REACH registration status, followed by detailed application information for that family. Use the navigation below to jump directly to your area of interest.
1.1 — Dimethyl Silicone Fluids (PDMS)
The core polydimethylsiloxane range — clear, odorless fluids available from 0.65 to 100,000 cSt in industrial, cosmetic, food, and medical grades
| Product Name | CAS Number | REACH Status | |
|---|---|---|---|
| Hexamethyldisiloxane (HMDSO, 0.65 cSt) | 107-46-0 | REACH Registered | Price & Sample |
| Octamethyltrisiloxane (1 cSt) | 107-51-7 | Contact for Status | Price & Sample |
| Decamethyltetrasiloxane (1.5 cSt) | 141-62-8 | Contact for Status | Price & Sample |
| Dodecamethylpentasiloxane (2 cSt) | 141-63-9 | Contact for Status | Price & Sample |
| Dimethyl Silicone Fluid (5–1,000 cSt) — Industrial / Food / Cosmetic / Medical Grade | 63148-62-9 | REACH Registered | Price & Sample |
| Dimethyl Silicone Fluid (10,000–100,000 cSt) | 63148-62-9 | REACH Registered | Price & Sample |
| Dimethyl Silicone Emulsion | 63148-62-9 | REACH Registered | Price & Sample |
Super Low Viscosity
0.65 – 2 cSt
Price & Sample →Volatile · Near-water
Primary Applications
Optics, LED & Sensor TechnologyRefractive index matching fluids for optical calibration, LED production, and photonic sensors
Low-Temperature Laboratory BathsStable, easy-to-circulate bath fluids for cryogenic and sub-ambient testing
Dielectric & High-Compressibility FluidsElectrical insulation in precision instruments and high-pressure systems
Personal Care Volatile CarriersLinear PDMS replacement for D4/D5 cyclomethicones in EU-compliant cosmetic formulations. Volatile carrier for skin creams, sunscreens, hair care, antiperspirants, and deodorants. Cyclic content <0.1% — meets EU restrictions on rinse-off (2020), leave-in (2025), and medical (2027) products.
VOC-Exempt Solvent ReplacementReplaces petroleum-based solvents in environmentally regulated processes
Low Viscosity
5 – 20 cSt
Price & Sample →Pumpable · Low VTC
Primary Applications
Immersion Cooling — Data Centers & Energy StoragePDMS base fluid for single-phase immersion cooling of servers, GPUs, and battery energy storage systems. Non-flammable, high dielectric strength, compatible with electronic components.
Heat Transfer & Thermal Bath FluidsCirculating baths for R&D, QC labs, and process heating/cooling at extreme temperatures
Pharmaceutical Freeze-Dryer Coolant (Lyophilizer)5 cSt PDMS as the thermal transfer fluid in pharmaceutical lyophilizers. Circulates through plate heat exchangers between −55°C and 80°C to control product temperature during sublimation drying of vaccines, biologics, and pharmaceuticals.
Spandex & Synthetic Fiber Spin FinishSpin finish oil for polyurethane (spandex) and synthetic fiber production — provides lubricity and antistatic properties during high-speed spinning
ORC Turbo-Generator FluidsWorking fluids for Organic Rankine Cycle energy recovery systems
LED, Optics & PhotonicsLow-dielectric-constant fluids for RI matching and photonic applications
Plastic & Rubber LubricationLight-duty lubrication of polymer parts without swelling or degradation
Hydraulic FluidsLow-viscosity hydraulic systems requiring wide temperature range operation
Medium Viscosity
50 – 1,000 cSt
Price & Sample →Most Versatile · FDA Compliant
Primary Applications
Transformer Insulating Fluid (50 cSt)Silicone-based dielectric coolant for transformers, capacitors, and power equipment — higher flash point and thermal stability than mineral oil. See also: Lyson LYLC-467 Synthetic Ester Transformer Oil.
Mold Release & Anti-AdherenceRelease agents for rubber, plastic, and composite molding; tire manufacturing
Antifoam & DefoamerProcess defoaming in chemical production, wastewater treatment, and coatings
Polishes & Surface TreatmentBase ingredient for automotive, furniture, and metal polishes (100–350 cSt typical)
Paint & Coatings AdditivesFlow and leveling agents, surface modifiers for industrial coatings
Hydraulic & Mechanical FluidsMedium-duty hydraulic systems and damping applications
Textile ProcessingSpin finishes, sewing thread lubrication, and fabric treatment
Leather FinishingSolvent-based finishing and fat-liquoring of leather goods
Printing InksSilicone fluid as defoamer, slip / anti-rub additive, and leveling agent for offset, gravure, flexo, and screen printing inks — improves surface smoothness, scratch and scuff resistance, and gloss. 350 and 1,000 cSt are the typical working grades.
Food Grade Available: 350 cSt (NSF H1 registered) — Incidental-contact lubricant for food processing, food packaging, and antifoam agent (≤10 ppm) per FDA 21 CFR 173.340.
High Viscosity
5,000 – 100,000 cSt
Price & Sample →MIL-SPEC VV-D-1078
Primary Applications
Damping FluidsVibration control for aircraft instruments, dashpots, gyroscopes, shock absorbers, and timing devices
O-Ring, Gasket & Seal LubricationLong-life lubrication compatible with virtually all elastomers and plastics
Dielectric FluidsInsulation for transformers, capacitors, klystrons, magnetrons, and radar equipment
Hydraulic & Flow ControlControlled-speed devices, fluid clutches, high-pressure hydraulic systems
Oil & Gas Downhole FluidsStable performance under extreme temperatures and pressures
Cable LubricationWire and cable pulling compounds for electrical installation
Touch Screen TechnologyOptically clear fluids for capacitive display systems
Calibration & Flow TestingViscosity standards for laboratory and process calibration
Super High Viscosity
300,000 – 1,000,000+ cSt
Price & Sample →Defense & Aerospace
Primary Applications
Military & Avionic Instrument DampingPrecision damping for gauges, meters, and monitoring systems in defense and aerospace
Liquid Springs & Shock AbsorbersMissile suspension systems, railroad cars, and heavy trucks
Viscous Drive Clutches & Speed ControlTorsional dampers and controlled-speed coupling devices
Heavy-Duty Seal LubricationExtreme-service lubrication for large industrial sealing systems
Base Fluid for Silicone CompoundsStarting material for greases, pastes, and specialty silicone formulations
Food Grade PDMS
100 – 10,000 cSt
Price & Sample →NSF H1 · FDA 21 CFR
Primary Applications
Food Processing LubricantIncidental-contact lubricant for conveyors, packaging lines, and processing equipment
Antifoam AgentDefoaming in beverage production, fermentation, frying, and food processes (≤10 ppm)
Food Packaging MaterialsLubricant and release agent for paper, paperboard, and adhesive manufacture for food contact
Pharmaceutical Grade Dimethicone
USP / EP Grade
Price & Sample →EXCiPACT GMP Certified
Primary Applications
Syringe & Vial SiliconizationLubrication and surface treatment of glass and plastic pharmaceutical containers
Pharmaceutical ExcipientProcess aid in tablet, capsule, and topical drug manufacturing
Medical Device LubricationSiliconization of catheters, stoppers, and other device components
1.2 — Specialty & Modified Silicone Fluids
Functionally modified silicone fluids with reactive or enhanced-performance side chains for advanced industrial and formulation applications
| Product Name | CAS Number | REACH Status | |
|---|---|---|---|
| Hydroxy Silicone Fluid | 70131-67-8 | Contact for Status | Price & Sample |
| OH Polymer | 70131-67-8 | REACH Registered | Price & Sample |
| Vinyl Silicone Fluid | 63148-62-9 | Contact for Status | Price & Sample |
| Methyl Hydrogen Silicone Fluid | 63148-57-2 · 70900-21-9 · 68037-59-2 | REACH Registered | Price & Sample |
| Methyl Phenyl Silicone Fluid | 63148-52-7 · 63148-58-3 | REACH Registered | Price & Sample |
| Methyl Fluoro Silicone Fluid | 63148-56-1 | Contact for Status | Price & Sample |
| Hydrogen-Terminated Silicone Fluid | 70900-21-9 | Contact for Status | Price & Sample |
| Amino Silicone Fluid | N/A | Contact for Status | Price & Sample |
| Phenyl Vinyl Silicone Fluid | 225927-21-9 | Contact for Status | Price & Sample |
| Phenyl Hydrogen Silicone Fluid | 17875-55-7 | Contact for Status | Price & Sample |
Methyl Hydrogen Silicone Fluid
Si-H reactive crosslinker & surface modifier
Crosslinking agent for addition-cure (Pt-catalyzed) silicone rubber · Waterproofing treatment for textiles and building materials · Anti-adhesion coatings for paper and film · Also available as emulsion
Price & Sample →
Hydrogen-Terminated Silicone Fluid
H-terminated reactive PDMS
End-capping agent and chain extender in silicone formulations · Reactive base for specialty crosslinked silicone systems
Price & Sample →
Vinyl Silicone Fluid
Vinyl-functional reactive base polymer
Base polymer for addition-cure LSR and HCR silicone rubber · Sealants, platinum-cure coatings, and encapsulants · Lyson also supplies the key intermediate — tetramethyldivinyldisiloxane
Price & Sample →
OH Polymer (Silanol-Terminated)
OH-terminated PDMS · 500–50,000 cSt
Base polymer for RTV silicone rubber, sealants, adhesives, and protective coatings · Chain length controls final rubber hardness
Price & Sample →
Hydroxy Silicone Fluid
Hydroxy-functional silicone fluid
Condensation-cure silicone systems · Intermediate for further polymerization · Surface treatment and coating applications
Price & Sample →
Amino Silicone Fluid
Amino-functional silicone softener
Textile softening and fabric finishing · Fiber lubrication · Hair conditioning in personal care · Also available as emulsion (ready-to-use for textile mills)
Price & Sample →
Methyl Phenyl Silicone Fluid
Extreme-temperature stability · High RI
High-temperature heat transfer baths (−25°C to 250°C, short excursions to 300°C) · Base fluid for high-temp greases · Metal-to-metal lubrication · High-RI optical matching (RI up to 1.533 for 100% phenyl grades)
Price & Sample →
Phenyl Vinyl Silicone Fluid
Dual-functional: phenyl + vinyl groups
High-performance addition-cure silicone rubber with improved heat resistance · LED encapsulant systems · Specialty optical coatings
Price & Sample →
Phenyl Hydrogen Silicone Fluid
Phenyl-modified H-functional crosslinker
Crosslinker for phenyl-containing silicone rubber systems · Enhanced thermal and optical performance in cure formulations
Price & Sample →
Methyl Fluoro Silicone Fluid
Fluorinated silicone — chemical resistance
Fuel and solvent resistant lubrication · Aerospace sealing applications · Specialty coatings requiring chemical inertness beyond standard PDMS
Price & Sample →
Dimethyl Silicone Emulsion
Pre-dispersed PDMS in water — solvent-free
Textile finishing and softening · Paper release coating · Mold release in water-based systems · Concrete release agent · Automotive and furniture polish base
Price & Sample →
1.3 — Personal Care & Cosmetic Silicones
INCI-named silicone fluids and blends formulated for skin care, hair care, and color cosmetic applications
| Product Name | CAS Number | REACH Status | |
|---|---|---|---|
| Phenyl Trimethicone | 70131-69-0 · 2116-84-9 | REACH Registered | Price & Sample |
| Diphenylsiloxy Phenyl Trimethicone | 352230-22-9 | Contact for Status | Price & Sample |
| Cyclopentasiloxane & Dimethicone | 541-02-6 & 63148-62-9 | REACH Registered | Price & Sample |
| Cyclopentasiloxane & Dimethiconol | 541-02-6 & 70131-67-8 | REACH Registered | Price & Sample |
| Dimethicone & Dimethiconol | 70131-67-8 & 63148-62-9 | REACH Registered | Price & Sample |
Phenyl Trimethicone
High-gloss emollient · RI 1.46 · Dow 556 equivalent
Hair shine serums and end-of-hair oils · Eye shadow and color cosmetics · Skin-brightening emollients · SPF boosters and sunscreen bases
Price & Sample →
Diphenylsiloxy Phenyl Trimethicone
High-RI phenyl silicone (RI 1.49) · Shin-Etsu KF-56A equivalent
Sunscreens with enhanced UV performance · Premium skin care · Color cosmetics · High-gloss hair care formulations
Price & Sample →
Cyclopentasiloxane & Dimethicone
Volatile carrier + film-forming blend
Antiperspirants, deodorants, and spray-on skincare · Provides light, non-greasy initial feel with long-lasting silicone film
Price & Sample →
Cyclopentasiloxane & Dimethiconol
Volatile carrier + conditioning agent blend
Hair conditioning treatments · Skin care lotions and creams · Enhanced spreadability with conditioning afterfeel
Price & Sample →
Dimethicone & Dimethiconol
Silicone gum blend (12–18% gum content) · Dow PMX-1503/1507 equivalent
Leave-in hair treatments and conditioning sprays · Rich skin emollients · Long-lasting film-formers for SPF durability and color cosmetic wear
Price & Sample →
1.4 — Diffusion Pump Oils
High-vacuum silicone fluids equivalent to Dow Corning 702/704/705 — for vacuum systems, semiconductor processing, and analytical instruments
| Product Name | CAS Number | REACH Status | |
|---|---|---|---|
| 702 / 704 / 705 Diffusion Pump Silicone Fluid | 3982-82-9 · 3390-61-2 | Contact for Status | Price & Sample |
LS-702 Diffusion Pump Fluid
General-purpose vacuum fluid · 10⁻⁶ torr
Equivalent to DOW DC 702 · Mixed phenylmethyl dimethyl cyclosiloxane · General-purpose fluid for vacuums down to 10⁻⁶ torr · Low viscosity for fast pumping speeds
Price & Sample →
LS-704 Diffusion Pump Fluid
High vacuum · 10⁻⁸ torr · Explosion resistant
Equivalent to DOW DC 704 · Tetramethyl tetraphenyl trisiloxane · Reaches 10⁻⁸ torr untrapped · Excellent explosion resistance · Semiconductor and analytical instruments
Price & Sample →
LS-705 Diffusion Pump Fluid
Ultra-high vacuum · 10⁻⁹ torr
Equivalent to DOW DC 705 · Penta phenyl trimethyl trisiloxane · Reaches 10⁻⁹ torr · Extremely low vapor pressure · Best radiation resistance · Nuclear and space applications
Price & Sample →
Not sure which grade fits your application?
Tell us your use case, required viscosity range, and volume — our technical team will recommend the right Lyson product and send you a free sample.
Request Technical RecommendationAbout Us
Lyson, established in 2018, is a subsidiary of a parent company that has been in business for over 30 years. The parent company also has subsidiaries in Tokyo and Frankfurt. This gives us access to a global network of silicone-based raw material suppliers and customers.
why Us?
At Lyson, we offer more than just export service. We offer value-added trade services that include:
- Free sourcing service until you are satisfied with the quality, quantity, cost, timing, and packaging of your order
- Up-to-date market insights and advice to help you make informed decisions and avoid price fluctuations
- Quality guarantee and testing before purchasing to ensure you get the best products for your needs
- Fast and accurate sourcing thanks to our 30 years of local supply chain network and experience
Contact Us
Call Us
Tel:+86 21 3363 2226
Lyson Chem-Materials Shanghai Company
sales@lysonchem-materials.com
Room 421, No. 62 – 421, Hongcao Road, Xuhui, Shanghai,
China 200233
Tel:+49 (0) 69 870070050
GW United Chemicals GmbH
info@gwunitechem.com
Max-Holder-Str. 19, Frankfurt,
Germany
Tel:+81 3 3436 2520
GW Chemicals Nippon
info@gwchem.jp
東京都港区虎ノ門3丁目22番14号 エミタス虎ノ門ビル, “Isenburg” , “1201”
Japan
Tel:+1 347 9400534
GW United Chemicals USA Inc.
info@gwunitedchem.com
165 Broadway, 23rd Floor, New York, 10006
United States of America
Frequently Asked Questions
A: Here are the three third parties, they offer testing services, and we send our sample to them before
www.exponent.com
www.rjlg.com