As shown in Figure 1, sealing devices come in two types: contact and non-contact.
Oil seals are among the major contact type sealing devices.
- Resistant to petroleum oils and Freon.
When choosing silicone and rubber gaskets, it is important to consider the specific requirements of the application, including temperature range, chemical exposure, and sealing pressure. High-quality gaskets should be selected based on their material composition, durability, and compatibility with the intended use. Working with reputable suppliers and manufacturers ensures access to reliable silicone and rubber gaskets that meet industry standards and performance requirements.
Various machines have different components that, when combined, work together as a whole. The equipment will not last forever and will eventually deteriorate through use. The use of mechanical lubrication protects these machines from deterioration while maintaining their designed function.
However, using the wrong type or not applying sufficient lubrication can lead to machine damage, equipment failure, and leaks. Therefore it is important to choose the correct lubricant for your machine.The shaft surface to be in contact with the lip should be finished to
0.1 to 0.32 μmRa and 0.8 to 2.5 μmRz
and the lead angle to no greater than 0.05°. (There is a risk that the lead marks will impede the sealing performance of the oil seal: see Figure 5.)
Polyacrylate Oil Seals - Mostly selected for automotive and transmission uses, polyacrylate seals are able to withstand fuel, oil, ozone, sunlight and weather when used. With cars exposed to all these different fluids and elements, they are the perfect choice. However, they should not be used in low temperatures, as their flexibility weakens when cold.


Oil seals are found in a wide range of applications, in virtually every industrial sector. It is essential to select the correct oil seal so that the application in which it is used can run efficiently, free of leaks or other issues. In this blog, we explain which factors you should pay attention to when selecting the best oil seal for your application.
Compared with nitrile rubber, superior in resistance to heat and abrasion
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Oil seals come in a vast range of materials and compounds. Even older materials, such leather, are still used today. Nitrile is among the most common materials for oil seals but is slowly losing ground to PTFE, which is gaining popularity due to its effectiveness in high-speed applications.

valve oil seal. Excessive oil in the combustion chamber can lead to fouled spark plugs, increased emissions, and reduced engine performance. By controlling the flow of oil into the combustion chamber, valve oil seals help to maintain optimal engine function.
Leather oil seals are commonly used for parts that are exposed to dirt and poor lubrication. The major advantage of this material is that it can function in cases where synthetic rubber cannot function. They are used for shafts that have rough surfaces that are more than what rubber seals can handle. This is because they are pre-lubricated and have the capacity to absorb liquids.
When installing a product, people often ignore the instructions because there is an idea that we can do it ourselves. However, oil seals are fragile devices that require attention and specific instructions to be followed before and after use.
Mechanical seals, like oil seals, can be easily damaged during installation. Taking the time to read the installation manual will provide you with step-by-step information on the correct installation or replacement of oil seals.
Figure 2: Typically shaped oil seal and component nomenclature

