Jiujiang Deep Sea Technology Development Co., Ltd.

High-viscosity methyl silicone oil – empowering efficient applications in multiple fields

Dec 31, 2025

High-viscosity methyl silicone oil (5000~1000000mm²/s) is a special material composed of polydimethylsiloxane. It possesses many excellent properties, such as high viscosity, high-temperature stability, low volatility, good insulation, and chemical inertness. Therefore, high-viscosity methyl silicone oil has wide applications in various fields.

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12500 viscosity is an extremely high viscosity polydimethylsiloxane (dimethyl silicone oil), a colorless and transparent liquid. It maintains stable physical properties within a temperature range of -40℃ to 200℃, exhibiting good heat and cold resistance. Its chemical properties are stable, essentially non-toxic and odorless, non-irritating to the skin, and have good biocompatibility. It is soluble in many organic solvents and possesses high compressibility, high shear stability, good abrasion resistance, and hydrophobicity.

 

One.  Applications in the Machinery Industry

High-viscosity silicone oil is used as a lubricating grease, providing lubrication, sealing, thermal conductivity, and insulation. In motors, electrical appliances, and electronic instruments, it serves as an insulating medium with temperature resistance, arc and corona resistance, corrosion resistance, moisture resistance, and dust prevention. It is also used as an impregnating agent in transformers, capacitors, and television scanning transformers. In various precision machinery, instruments, and meters, it is used as a liquid shock absorber and damping material. Dimethyl silicone oil's shock-absorbing performance is less affected by temperature, making it suitable for applications with strong mechanical vibrations and large environmental temperature variations, such as instruments used in aircraft and automobiles. It is used for shock absorption, damping, and stabilizing instrument readings, and can also be used as a liquid spring in aircraft landing gear.

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Two.  As a defoamer

Due to its low surface tension, insolubility in water, vegetable oils, and high-boiling-point mineral oils, good chemical stability, and non-toxicity, this product is widely used as a defoamer in industries such as petroleum, chemical, medical, pharmaceutical, food processing, textile, printing and dyeing, and papermaking.

 

Three. As a release agent

High-viscosity methyl silicone oil is mainly used for releasing polyurethane and plastic molds, giving the release agent high temperature resistance, release force, and adhesion. Using it as a release agent not only facilitates demolding but also makes the surface of the product clean, smooth, and with clear texture.

 

Four. As an Additive

High-viscosity methyl silicone oil can be used as an additive for many materials. For example, it can be used as a gloss enhancer for paints. Adding a small amount of silicone oil to paint can prevent the paint from floating or wrinkling and improve the gloss of the paint film. Adding a small amount of silicone oil to ink can improve printing quality. Adding a small amount of silicone oil to polishing oil (such as automotive polish) can increase gloss, protect the paint film, and have excellent waterproof effect. As a hand feel agent, it provides a smooth feel. After being processed into an emulsion, it can be used for the coating treatment of PU leather.

 

Five.  Insulating, Dustproof, and Mildew-proof Coating

By dimethyl silicone oil impregnated onto the surface of glass or ceramics and then heat-treated, a semi-permanent waterproof, mildew-proof, and insulating film can be formed. This film can significantly improve the insulation performance of devices, prevent lenses and prisms from becoming moldy, extend the shelf life of pharmaceuticals, reduce the loss of formulations due to adhesion to the walls, and also act as a lubricant, reducing friction and extending film life, etc.

 

Methyl silicone oil is an indispensable material in many fields due to its excellent properties. Jiujiang Deep Sea Technology supplies dimethyl silicone oil in various viscosities, from low to high. Common viscosities include 5cs, 10cs, 50cs, 100cs, 350cs, 500cs, 1000cs, 5000cs, 10000cs, 12500cs, 60,000cs, 300,000cs, and 500,000cs. Stock is available in our warehouse!

500cst Water Soluble Silicone Oil

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