Next, apply a small amount of grease to the seal lip(s) and the area of the shaft in contact with the seal. When using a double-lip seal, fill the small cavity between the two lips with grease as well. This both protects the lips during initial installation and break-in, and also acts as another barrier keeping contaminants out. When installing rubber-coated seals, apply lubricant to the outside diameter as well. This will help prevent the seal from rebounding or backing out from its mounting place.
Read More About Valve Oil Seal supplier Xingtai Huimao Trading Co.,Ltd. is a leading oil seal manufacturing expert with a professional design and manufacturing team to provide high-quality oil seal products for all industrial and automotive applications. For more than 40 years, we have continuously improved our technology to meet the needs of various industries, and produced oil seals that meet customer needs. We work with customers to provide high-quality and fast service as well as customized requirements. Whether it is new product development or OEM oil seals, or looking for replacement parts or wear parts, our expert team can recommend suitable oil seals for your application.
Our rubber seals are used in the following industries:
- 2. Brand Different brands offer various levels of quality and durability for their car oil seals. Some brands are known for their high-performance products, while others may focus on offering affordable options. The brand you choose will also influence the price of the oil seal.
2. Oil seal structure and functions
Why use NOK-CN factory-made oil seals?

What materials are available?
PTFE is special in that a pre-tensioned spring is not required. This is because the material returns to its original shape when heated, also known as the shape-memory polymers (SMPs) effect. These oil seals are also supplied as integrated parts, where it only needs to be installed as one component.
Oil seals made of HNBR are characterised by excellent properties that include high resistance to mineral oils with additives, low steam and gas permeability, good cold flexibility down to -30 °C depending on type, good ozone resistance and friction resistance. HNBR seals withstand heat up to 150°C.
rubber or polymer
Figure 3: Sealing function of main lip radial load
* KOYO is a registered trademark of JTEKT.