Seals, including oil seals, have undergone a great development in recent years and are totally unlike the original product. PTFE has taken over the oil seals market for modern engines mainly because traditional oil seals started causing more and more problems. Such as evaporation of chemical plasticisers from the elastomeric material, which eventually caused engine oil leakage. Now, the focus is more on durability and frequency of servicing.
Oil seal specifications
- The performance of a spark plug is influenced by several factors, including its design, material composition, and heat range. The design of the plug determines its ability to withstand high temperatures and pressures without failing. Materials such as iridium and platinum are used in high-performance spark plugs due to their excellent resistance to heat and wear.
- Another benefit of PTFE oil seals is their excellent chemical resistance. They can withstand exposure to a wide range of chemicals, including acids, bases, and solvents, without deteriorating or losing their sealing properties
ptfe oil seal. This makes them suitable for use in applications where other types of seals may be damaged by exposure to chemicals. - Moreover, a compromised valve cover gasket can allow debris and moisture to enter the engine, leading to corrosion or even engine failure in extreme cases
Type 1
0.4 to 1.6 μmRa,
1.6 to 6.3 μmRz
2. For rubber O.D. wall type:
1.6 to 3.2 μmRa,
6.3 to 12.5 μmRz
(Firmly affixes the oil seal and prevents leakage through the seal O.D.)

Oil seal: get to know all the details about this timing chain kit component
Sealing edge This refers to the component of the oil seal that makes contact with the shaft.
It is wedge-shaped to be pressed against the shaft surface and makes contact with the shaft to ensure sufficient sealing performance and suitability for operation at high peripheral speed.
Table 3: Features of each seal type
What Is an Oil Seal?
single and double lip
These seals are designed to fit snugly around the shaft of the machine, preventing oil from leaking out while also keeping dirt, dust, and other contaminants from entering.