What is 1,000 cSt silicone oil used for?
The classic antifoam-concentrate base oil, plus tenacious release and lubrication for seals, valves and chain, dielectric duty, and conditioning. A 1,000 cSt film persists under shear yet still disperses and emulsifies. Typical spec: 0.971 specific gravity, ≥ 315 °C open-cup flash point.
Dimethicone- ▸ Antifoam / foam-control base oil — the base material for silicone antifoam compounds, incl. food-processing and refinery foam control (confirm grade compliance for food-plant use)
- ▸ Tenacious lubricant / release agent for O-rings, gaskets, valves, seals, and freezer chain and cable
- ▸ Polish and coatings additive — blended across viscosities to tune application ease and depth of gloss
- ▸ Electrical insulating / dielectric fluid
- ▸ Personal-care conditioning for skin and hair serums — slip, shine and long-lasting protection
Don’t see your viscosity? We can custom-formulate silicone fluid to your target cSt — tell us your spec.
Not sure which grade? Silicone oil viscosity guide (5 to 500,000 cSt) · All silicone oils
- ▸ Safety Data Sheet (SDS) PDF · SDS
- ▸ Typical Certificate of Analysis (CoA) PDF · COA
Values shown are typical for the current commercial grade. A lot-specific Certificate of Analysis accompanies every shipment; the grade-specific SDS is available on request.
Mid- and high-viscosity polydimethylsiloxane fluids (>= 5 cSt) are reported as not meeting GHS hazard-classification criteria. The grade-specific SDS governs. A full SDS is supplied with every shipment and on request; hazard status is confirmed against the grade-specific SDS.
Cross-reference: comparable to XIAMETER PMX-200 Silicone Fluid 1,000 cSt (a Dow product): the same linear polydimethylsiloxane chemistry at the same nominal viscosity. RawSource is independent of Dow; confirm grade-critical specs against the RawSource TDS and lot CoA.
Silicone Oil 1,000 cSt is the classic antifoam-concentrate base oil: high enough for a tenacious, persistent film yet still able to disperse and emulsify. It is the base material for silicone antifoam compounds and a tenacious release/lubricant for seals, valves and chain, plus a polish and coatings additive, a dielectric fluid and a personal-care conditioner.
Reviewed and updated July 2026 by the RawSource technical team.
Silicone oil 1,000 cSt is a polydimethylsiloxane (PDMS, dimethicone) fluid with a kinematic viscosity of 1,000 centistokes at 25 °C, used mainly as antifoam base oil, release agent, and lubricant.
Key Figures for Bulk Buyers
- 10 ppm is the ceiling FDA sets on dimethylpolysiloxane carried into food from defoamer use, and zero in milk, under 21 CFR 173.340 (2025 edition).
- 300 to 1,050 cSt at 25 °C is the PDMS viscosity window the same 21 CFR 173.340 specification permits for defoaming agents used in food processing; the 1,000 cSt nominal grade sits inside it. Confirm full-spec compliance per lot for food-plant use.
- 3% general rate of duty applies to US imports of silicones in primary forms under HTS subheading 3910.00.00 (USITC Harmonized Tariff Schedule, 2026).
- 30 to 60 months of usable life, unopened at or below 60 °C, is what Dow publishes for its XIAMETER PMX-200 polydimethylsiloxane fluids in the PMX-200 technical data sheet (2020).
- 0.61 viscosity-temperature coefficient and a 315 °C flash point are published for the 1,000 cSt grade in Gelest DMS-T31 product data (accessed July 2026).
Frequently Asked Questions
What is silicone oil 1,000 cSt used for?
1,000 cSt silicone oil (dimethicone / PDMS) is the classic antifoam-concentrate base oil, plus a tenacious release and lubricant film for seals, valves and chain, a polish and coatings additive, a dielectric fluid, and a conditioning agent. It is heavy enough to persist, yet still dispersible and emulsifiable.
Is 1,000 cSt silicone oil the same as dimethicone or PDMS?
Yes. Silicone oil, silicone fluid, dimethicone and PDMS all name the same linear polydimethylsiloxane (CAS 9006-65-9) — 1,000 cSt is the viscosity grade, not a different chemistry. Because PDMS is a polymer, properties are reported per grade rather than as one fixed molecular weight.
Is 1,000 cSt silicone oil flammable?
No. With a flash point of ≥ 315 °C (open cup), the 1,000 cSt grade sits far above GHS flammable-liquid cut-offs, and mid- and high-viscosity PDMS is not otherwise GHS-classified. Only the volatile sub-5 cSt silicone fluids are flammable. The grade-specific SDS ships with every order.
What is the CAS number for silicone oil 1,000 cSt?
Silicone oil 1,000 cSt carries CAS 9006-65-9, with repeating-unit formula (C2H6OSi)n; some manufacturers list the equivalent trimethylsiloxy-terminated PDMS under CAS 63148-62-9. The cSt figure is the viscosity grade, not a separate substance — all dimethicone grades share the same CAS registry.
What packaging is 1,000 cSt silicone oil supplied in?
Bulk only: 55-gallon drums, 275-gallon IBC totes, and 5-gallon pails, with pallet and full-truck quantities quoted on request. A lot-specific Certificate of Analysis accompanies every shipment; the grade SDS is available on request. Submit an RFQ with your target volume and packaging.
What is 1000 cSt oil?
1000 cSt oil is dimethyl silicone fluid (polydimethylsiloxane) with a kinematic viscosity of 1,000 centistokes at 25 °C; one centistoke equals one square millimeter per second. On the PDMS viscosity ladder, 1,000 cSt is the workhorse antifoam base-oil viscosity, and it sits near the top of the 300 to 1,050 cSt window FDA permits for defoaming agents used in food processing under 21 CFR 173.340.
What is the viscosity of silicone oil 1000 cSt?
Nominal viscosity is 1,000 centistokes (1,000 mm²/s) measured at 25 °C; the lot Certificate of Analysis reports the exact value. Temperature response is relatively flat: Dow’s XIAMETER PMX-200 data sheet lists a viscosity-temperature coefficient of 0.61 for the 1,000 cSt grade, which works out to the fluid keeping about 39 percent of its 38 °C viscosity at 99 °C, a flatter slope than the petroleum oils charted alongside it.
What are the downsides of silicone lubricants?
Two limitations matter to industrial buyers. Straight dimethyl silicone oil lubricates plastic and elastomer contacts well, but Dow’s PMX-200 data sheet cautions that lubricity with metals depends on the pairing and advises care in selecting metals for pumps and moving parts, so qualify it before steel-on-steel duty. The fluid also migrates: at 21.2 mN/m surface tension it wets clean surfaces and leaves a release film that disrupts later painting or bonding, and removal takes solvents such as toluene, not water.
What is the price of silicone oil 1000 cSt?
Bulk 1,000 cSt silicone oil is quoted per shipment rather than list-priced; unit cost steps down from 5-gallon pails to 55-gallon drums to IBC totes to full truckloads. Standard net fills run about 200 kg per drum and 950 kg per IBC, the same fills Shin-Etsu lists for its KF-96 1,000 cSt fluid. Send monthly volume, packaging, and delivery point with an RFQ for a firm per-kilogram quote.