About Sealing

Static sealing: The sealing element does not move relative to another part of the equipment or machine.
Dynamic sealing: The sealing surfaces are in motion relative to each other.

Sealing is the process of joining surfaces together, where two different materials are joined. It usually uses an external substance to adhere to the surfaces of both parties being joined, while transferring forces from one party to another. This process often protects against mechanical damage as well as chemical damage during its lifetime.

Elastomers are highly elastic, viscous polymer materials capable of recovering their original shape after being stretched. Most elastomers must undergo a curing process of heat, irradiation or chemical reaction to become fully hardened. Types of elastomers include:

Saturated: Lower reactivity. This type predominant stability against heat, ozone, oxygen and radiation. Reactions are only triggered when the specific circumstances are met and occurring in limited numbers. Silicone rubber is in this category.
Unsaturated: Carbon-carbon double and triple bonds cause the elastomer to cure in a vulcanization process.