Dimethyl Silicone Fluid CAS 63148-62-9

Product Name: Dimethyl Silicone Fluid

Synonymous Names: PDMS; Polydimethylsiloxane; Silicone Oil; Dimethyl Silicone Oil; Dimethylpolysiloxane; 201 Silicone Oil; Dimethicone

CAS No.: 63148-62-9

Viscosity: 2–100000 mm²/s（cSt）

EINECS Number: 613-156-5

Molecular Formula: (C2H6OSi)n

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Description
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Foconsci’s Dimethyl Silicone Fluid (PDMS) is a clear silicone fluid available in different viscosity grades from 2 to 100,000 mm²/s at 25°C. The viscosity can be selected according to the application:

2–20 mm²/s: These low-viscosity grades spread easily and are suitable for personal care formulations, light lubrication, surface treatment and applications that require a low-viscosity silicone fluid.
50–1,000 mm²/s: These grades are commonly used in lubricants, release agents, polishes, surface treatments, defoaming applications and electrical insulating fluids.
2,000–100,000 mm²/s: These higher-viscosity grades form a heavier and more lasting film. They are suitable for polishes, release and lubrication applications, and other formulations that require higher viscosity and better surface coverage.

Product Specification

Viscosity (25°C, mm²/s)	Specific Gravity (25°C)	Flash Point (°C)	Main Application
2 cSt	0.873	79	Personal care carrier、hair spray、cleanser、lotion、bath oil、nail polish、antiperspirant、deodorant；light industrial fluids
3 cSt	0.898	100	Low-viscosity personal care、carrier、light lubrication、surface treatment
5 cSt	0.915	134	Personal care、light lubrication、surface treatment、release
10 cSt	0.934	211	Personal care、lubrication、surface treatment、release
20 cSt	0.95	246	Lubrication、surface treatment、release、personal care
50 cSt	0.96	318	Polish、lubrication、surface treatment
100 cSt	0.965	>326	Automotive/furniture/metal polish、lubrication、release
200 cSt	0.965	>326	Polish、lubrication、surface treatment
350 cSt	0.97	>326	Polish、lubrication、release
500 cSt	0.97	>326	Polish、lubrication、defoaming、release
1000 cSt	0.97	>326	Polish、cosmetics、lubrication、electrical insulation、defoaming、release、leather treatment
2000 cSt	0.97	342	Higher-gloss polish、surface care、personal care
3000 cSt	0.97	346	Automotive/furniture/metal polish、protective cream、shaving foam、antiperspirant
5000 cSt	0.975	315	Higher-gloss polish、personal care
10000 cSt	0.975	>315	Higher-gloss polish、personal care
12500 cSt	0.975	>315	Automotive/furniture/metal/specialty polish、personal care
30000 cSt	0.975	>315	Automotive/furniture/metal/specialty polish、personal care
60000 cSt	0.975	>315	High-viscosity polish、personal care
100000 cSt	0.975	>315

Applications of Dimethyl Silicone Fluid (PDMS)

Mold Release and Surface Treatment: 2–1,000 cSt PDMS grades are commonly used for mold release and surface treatment. Lower-viscosity grades spread more easily over metal, rubber and plastic surfaces, while higher viscosities provide a heavier silicone film.

Lubrication and Damping: PDMS can be used as a lubricant and mechanical fluid over a wide viscosity range. Grades from 50 to 1,000 cSt are suitable for general lubrication, while 2,000–100,000 cSt grades can be selected for damping, cushioning and applications that require a thicker fluid film.

Defoaming: 50–1,000 cSt PDMS can be used as a silicone component in defoaming applications. For water-based systems, silicone emulsions or formulated silicone antifoams are usually easier to disperse than pure silicone oil.

Polishes and Water-Repellent Products: 50–60,000 cSt PDMS can be used in automotive, furniture, metal, leather and household polishes. Lower viscosities spread and wipe more easily, while higher-viscosity grades give a heavier film and can provide higher gloss and longer surface coverage.

Personal Care: Low-viscosity PDMS such as 2–20 cSt spread easily and can be used in selected personal care formulations. Higher-viscosity cosmetic-grade PDMS can also be selected when a smoother, more substantial skin or hair feel is required.

Packaging and Storage

Our Dimethyl Silicone Fluid is packed in 200 kg drums and 1,000 kg IBCs.

Keep the container closed to prevent dust, water and other materials from entering the oil. Store away from strong oxidizing materials and direct heat.