Silicone Oil 350 cPs (Polydimethylsiloxane PDMS) Lubricant / Oil Bath / Release Agent / Treadmill Oil

SILICONE OIL 350 - Technical Grade

Dimethicone 350

TREADMILL OIL / LUBRICANT

A high quality of silicone oil which is clear liquid. Its viscosity shows very little change with temperature variation. It exhibits minimum of change among all types of silicone fluids.

Outstanding resistance to high and low temperature extremes, maintenance of flexibility over a wide temperature range are its unique properties. With a flash point of 315^oC it is ideal for use as an oil bath up to 230^oC

It shows high resistance to breakdown by mechanical shearing. The low change in viscosity with temperature and excellent heat and cold resistance makes it an ideal lubricant. It is, therefore, widely used in gear wheels, bearings and brushes. It exhibits excellent dielectric properties, which are maintained for prolonged periods of time even under varying operating conditions.

Performance properties:

• High and low-temperature stability
• Low pour point
• Low temperature and pressure dependence of viscosity
• Good dielectric characteristics
• Low interfacial energy
• High surface activity
• High compressibility
• Chemical inertness

Uses for Silicone 350:

• Heat transfer media
• Thermal transfer fluids
• Hydraulic fluids
• Dielectrics fluids
• Water repellents
• Polishes - car polish, tyre shines, metals, furniture
• Lubricants for eg treadmills
• Antifoams
• Mould release agents
• oil baths up to 230^oC
• Blended with other silicone oils to create new viscosities (see below for further details.

Properties of silicone oil:

• Synonyms: alpha-Methyl-omega-methoxypolydi­methylsiloxane, PDMS
• Formula: (-Si(CH3)2O-)n
• CAS No: 63148-62-9
• Viscosity: 350 mm2/s
• Melting Point: -55 ^oC
• Autoignition Point: >400 ^oC
• Flash Point: 315 ^oC
• Dielectric strength: 16 kV/mm
• Density: 0.98 g/cm³ at 20^oC
• Solubility: insoluble in water

Silicone 350 is insoluble in water, methanol, ethanol, dilute acids and caustics, vegetable and mineral oils, glycol and glycerine. It is soluble in hexane, aromatic hydrocarbons, chlorohydrocarbons, ethers, esters, ketones and higher alcohols.

Health & Safety:

This product is not classified according to the EU regulations.

Click here for MSDS

Click here for TECH

Blending silicones to create new viscosities:

To blend silicone oils of different viscosities (For example silicone 20 cSt and 350 cSt to achieve a target viscosity of 50 cSt), we can use the logarithmic blending rule commonly applied for Newtonian fluids like silicone oils.

Formula (log viscosity rule):

$$\log(V_t) = x \cdot \log(V_1) + (1 - x) \cdot \log(V_2)$$

Where:

• $V_t =$ target viscosity (50 cSt)

• $V_1 =$ high-viscosity component (350 cSt)

• $V_2 =$ low-viscosity component (20 cSt)

• $x =$ fraction of the high-viscosity component (350 cSt)

Solving for $x$:

$$\log(50) = x \cdot \log(350) + (1 - x) \cdot \log(20)$$ 

$$1.69897 = x \cdot 2.54407 + (1 - x) \cdot 1.30103$$

$$1.69897 = 2.54407x + 1.30103 - 1.30103x$$

$$1.69897 - 1.30103 = (2.54407 - 1.30103)x$$

$$0.39794 = 1.24304x$$

$$x \approx 0.32$$

Result:

• Use 32% of 350 cSt silicone oil

• Use 68% of 20 cSt silicone oil

Example for 1 litre (1000 mL) total:

• 320 mL of 350 cSt

• 680 mL of 20 cSt

This blend will yield 1 litre of 50 cSt silicone fluid.

Other silicone oils we have available:

Silicone oil 50cPs

Silicone oil 350cPs

Silicone oil 1000 cPs

Silicone oil 5000cPs

Silicone emulsion

PLEASE NOTE: This product is not for human or animal consumption.