Silicone oil

What is the difference between silicone oil and silicone fluid

What is Silicone?

Silicone is a synthetic polymer made up of repeating units of silicon and oxygen atoms, with methyl or vinyl groups attached to the silicon atoms. It is a highly versatile material with a wide range of properties, making it useful in various industries, including healthcare, cosmetics, electronics, and construction.

Silicone is known for its exceptional resistance to extreme temperatures, chemicals, and weathering, making it ideal for use in harsh environments. It is also non-toxic, making it a popular choice in medical and food-grade applications. However, silicone also has a low surface tension, making it difficult to spread or adhere to surfaces. This is where silicone oil and fluid come into play.

What is Silicone Oil?

Silicone oil is a silicone-based lubricant that is characterized by its high viscosity and low surface tension. It is a clear, odorless, and inert liquid that is made up of long-chain polydimethylsiloxane molecules. These molecules have a linear structure, and the chains can vary in length, resulting in a range of silicone oil viscosities.

Silicone oil is non-reactive and has a wide operating temperature range of -50°C to 200°C, making it suitable for use in high-temperature applications. It is also highly resistant to oxidation, which means it can maintain its stability and effectiveness for extended periods, even under harsh conditions.

Due to its high viscosity, silicone oil is commonly used as a lubricant for high-load and high-speed applications, such as in bearings, gears, and hydraulic systems. It provides excellent lubrication, reducing friction and wear on moving parts while maintaining its effectiveness over a range of temperatures.


What is Silicone Fluid?

Silicone fluid, also known as silicone fluid emulsion, is a silicone-based lubricant that differs from silicone oil in terms of viscosity. While silicone oil has a higher viscosity, silicone fluid has a lower one, making it more fluid and easy to spread.

Silicone fluid is typically made by blending silicone oil with water and emulsifiers to create a stable, milky white emulsion. It is a low-viscosity liquid that is water-soluble, making it easier to clean up and remove from surfaces. However, unlike silicone oil, silicone fluid is less stable and is prone to breaking down at high temperatures, limiting its use in certain applications.

Silicone fluid is commonly used as a contact lubricant, especially in industries where non-reactivity and low-viscosity are essential. It is used in the manufacture of personal care products, such as lotions, creams, and shampoos, due to its smooth and silky feel. It is also used in the production of soft silicone rubbers, where it acts as a plasticizer, reducing the overall viscosity of the rubber.

Key Differences between Silicone Oil and Silicone Fluid

1. Viscosity: As mentioned earlier, the main difference between silicone oil and silicone fluid is their viscosity. Silicone oil is thicker and has a higher viscosity, while silicone fluid is thinner and has a lower viscosity.

2. Stability: Silicone oil is more stable than silicone fluid, especially at high temperatures. This is because silicone oil has a higher molecular weight, which makes it more resistant to heat and oxidation.

3. Lubrication: Due to its higher viscosity, silicone oil provides better lubrication and has a longer-lasting effect than silicone fluid. This makes it suitable for use in high-load and high-speed applications.

4. Clean-up: Silicone fluid is easier to clean up than silicone oil due to its water-solubility. This makes it more suitable for use in applications where easy removal is necessary, such as in the production of personal care products.

5. Heat resistance: Silicone oil has a wider operating temperature range than silicone fluid, making it suitable for use in high-temperature applications. Silicone fluid is prone to breaking down at high temperatures, limiting its use in certain industries.

Silicone oil and silicone fluid are two types of silicone-based lubricants that have distinct differences in viscosity, stability, lubrication, clean-up, and heat resistance. Understanding these differences is vital in choosing the right one for your specific needs, whether it is for industrial, medical, or cosmetic purposes. Both silicone oil and silicone fluid have their unique advantages and disadvantages, and choosing the right one depends on your application requirements.

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For many years, we have been committed to the research and development, as well as production, of products such as Organic Pigments, Titanium Dioxide, Optical Brighteners, Antioxidants, Hot Ceramics Products, Hot Silicone Products, etc. Our company is committed to providing customers with high-quality service and excellent products.

silicone oil 350cst 100cst


What are the main properties that make silicone oil and silicone fluid useful in various industries?

Both silicone oil and silicone fluid have low surface tension, making them excellent at spreading and forming thin layers.
They also have high thermal stability, providing resistance to high temperature and extreme cold.
Additionally, they have good electrical insulation properties, chemical resistance, and low volatility.

Can silicone oil and silicone fluid be used in medical applications?

Yes, both silicone oil and fluid are often used in the medical field due to their biocompatibility, meaning they are non-toxic and do not cause adverse reactions in the body.
They are commonly used in medical devices, such as implants and prosthetics, as well as in medical lubricants and as a component in pharmaceuticals.

Are there any environmental concerns with using silicone oil and silicone fluid?

Both silicone oil and fluid are generally considered safe for the environment as they are non-toxic and non-biodegradable.
However, their disposal should be done properly to prevent any potential harm to the ecosystem.

Can silicone oil and fluid be used interchangeably in applications?

No, silicone oil and fluid have different viscosities and properties, making them suitable for different purposes.
It is important to choose the right type of silicone oil or fluid for a specific application to achieve optimal performance.

what is silicone oil? the guide to silicone oil

what is silicone oil? 

Silicone oil, also known as polydimethylsiloxane or PDMS, is a type of synthetic polymer derived from silicon, oxygen, carbon, and hydrogen. It is a colorless, odorless, and inert liquid that has a wide variety of industrial and household applications. We will explore the technical characteristics, usage tips, product features, and answer some frequently asked questions about silicone oil.

Technical Characteristics:

  •  Chemical Composition: As mentioned earlier, silicone oil is primarily made up of silicon, oxygen, carbon, and hydrogen atoms. This gives it a unique molecular structure that allows it to have both water-repellent and water-absorbing properties, making it hydrophobic and hydrophilic at the same time.
  • Viscosity: Silicone oil is known for its low viscosity, meaning it is a thin, runny liquid. It is available in various viscosity grades, ranging from 0.65 cSt (centistokes) to 1 million cSt, making it suitable for a wide range of applications.
  • Temperature stability: Silicone oil has a high resistance to extreme temperatures, making it an ideal choice for applications that require a stable and durable lubricant. It can withstand temperatures ranging from -73°C (-99°F) to 260°C (500°F).
  • Chemical stability: Due to its inert nature, silicone oil is highly resistant to chemicals, acids, and bases, making it an excellent choice for harsh environments.
  • Non-toxic: Silicone oil is considered to be non-toxic and non-hazardous, making it safe for use in food and medical applications.
  • Inertness: This product is not reactive and does not readily oxidize, making it stable and long-lasting.

Usage Tips:

  • Lubricant: One of the most common uses of silicone oil is as a lubricant. Its low viscosity allows it to flow easily, providing smooth and efficient lubrication for various moving parts.
  • Release agent: Silicone oil is also used as a release agent, meaning it prevents materials from sticking to surfaces. It is commonly used in the production of rubber, plastic, and other molded items.
  • Water repellent: Due to its hydrophobic nature, silicone oil is used as a water repellent for fabrics, leather, and other materials. It helps to protect these materials from water damage and stains.
  • Anti-foaming agent: The low surface tension of silicone oil makes it an effective anti-foaming agent. It is commonly used in the food and beverage industry to prevent excessive foam formation during production processes.
  • Cosmetics: Silicone oil is a common ingredient in various cosmetic products, such as moisturizers, hair conditioners, and makeup. It helps to provide a smooth and silky texture to these products.
  • Medical applications: Due to its non-toxic and inert nature, silicone oil is used in medical devices, such as syringe lubricants, prosthetics, and implants.

Silicone oil

Product Features:

  • High thermal stability: Silicone oil can withstand high temperatures, making it suitable for use in extreme heat environments, such as foundries and steel mills.
  • Low surface tension: The low surface tension of silicone oil makes it highly spreadable, meaning it can cover a large surface area with only a small amount of product.
  • Water repellent: This product creates an effective barrier between surfaces and water, making it ideal for waterproofing applications.
  • Non-yellowing: Unlike many other oils, silicone oil does not turn yellow over time, making it ideal for use in applications where visual appearance is important.
  • Wide range of viscosity: As mentioned earlier, silicone oil is available in a wide range of viscosity grades, making it suitable for use in various industries and applications.
  • Long shelf life: Silicone oil has a long shelf life and does not degrade or lose its properties over time, making it a cost-effective and reliable choice for many applications.

Other Product Related Aspects:

  • Storage and handling: Silicone oil should be stored in a cool, dry place, away from direct sunlight and heat sources. It should also be kept away from strong acids and bases.
  • Compatibility: Silicone oil is compatible with many materials, including plastics, rubbers, and metals. However, it is always best to test compatibility before use.
  • Clean-up: In case of spills, silicone oil can be cleaned up using soap and water. It may take some time, but the oil will eventually dissolve in the water.
  • Available forms: Besides its liquid form, silicone oil is also available in spray, gel, and aerosol forms, making it easier to use in different applications.
  • Environmental impact: Silicone oil is considered to be non-toxic to the environment and does not harm aquatic life. However, it should not be disposed of in large quantities in natural bodies of water.

Silicone oil is a versatile and widely used product with many technical characteristics and features that make it suitable for a variety of applications. From lubrication to waterproofing to medical applications, silicone oil offers impressive performance, stability, and safety. As with any chemical product, it is essential to follow the recommended safety precautions and usage guidelines for the best results. We hope this guide has provided valuable information to help you better understand silicone oil and its applications.

HengyiTek is a chemical raw material supplier.Our aim is to be a reliable partner for global chemical customers, through supplying top quality chemicals produced in facilities with sustainable production.

Our partners are equipped with advanced and environmental production line, talented technician and fast response team. The production sites are ISO9000 certified.Our selected products are approved and are in great demand by the global customers and target industries.

Volatile Silicone Oil HY-101, 1.5 cst dimethyl silicone oil

They are also tested by third-party facilities for the heavy metal contents, ROHS, and other industry standard.Certificates like SGS-ROHS, AP89-1, and REACH are available.

Q: Is silicone oil safe to use?
A: Yes, silicone oil is generally considered to be non-toxic and safe for use. However, it is always advisable to check the specific product’s safety data sheet before use.

Q: Can silicone oil be used with other lubricants?
A: Yes, silicone oil is compatible with most other lubricants. However, it is always recommended to check compatibility before use to avoid any adverse reactions.

Q: Can silicone oil be mixed with water?
A: No, silicone oil is not water-soluble and cannot be mixed with water. However, it can create an effective barrier between surfaces and water, making it useful for waterproofing applications.

Q: Can silicone oil be used in high-temperature applications?
A: Yes, silicone oil has a high resistance to extreme temperatures, making it suitable for use in high-temperature applications.

Q: Does silicone oil cure or harden over time?
A: No, silicone oil does not cure or harden over time. It remains in its liquid form, making it suitable for long-term use.