A rubber seal is a device which helps in joining systems or mechanisms together. It is a ring-shaped component that is designed to prohibit or limit the fluid leakage from a device. There are various types of seals used in various applications that have constantly moving equipment, such as the rotating or reciprocating shafts and cylinders that form an essential part of hydraulic and pneumatic systems including seals for windows of cars. Rubber seals are seals made from both natural and synthetic rubber.

Types of rubber used in rubber seals

• Natural Rubber
• Nitrile Rubber
• Chlorosulfonated Polyethylene (CSM)
• Fluoroelastomers (FKM)/
  Viton
• Butyl Rubber
• Silicone Rubber
• Styrene Butadiene Rubber

Applications
There are many types of rubber seals used in industries for different uses. Some of the industries that make use of these rubber seals include:

• Medical and pharmaceutical
• Waste disposal
• Aerospace
• Marine
• Food and chemical processing
• Automotive
• Military
• Nuclear and
• Pulp and paper mills

Application include pumps & valves, mechanical seals, hydraulic & pneumatics cylinder, filter, actuators, motors, engine, lubricating System etc.

Types of rubber seals

• Oil Seal: This is a very common type of seal. It is used to retain oil and other lubricants in rotary applications and prevent leaks. Many of these seals function with a flexible lip that rub against the shaft or housing to prevent leakage by providing a tight seal.
• Mechanical Seal: This seal is used in applications that have a rotating shaft under a state of high temperature, pressure and speed. The mechanical seals are used to prohibit fluid leakage for mechanisms such as pumps, mixers, agitators and cryogenic seals.
• Rubber O-Ring: This belongs to a class o-rings that are made from a synthetic rubber-like material called an elastomer. This is a sealing ring that has a circular cross section which can be either hollow or solid. The seal can be used as a secondary seal for many mechanical seals.
• Balanced Seal: These seals are used to reduce the effects of hydraulic pressure in the seal compartment.
• Bellows Seal: It is used as a formed or welded bellows which supply a secondary sealing and spring loading.
• Bidirectional pressure Seal: This type of seal uniformly seal as a result of pressure from both directions. It is also known as "double balanced seal" or "reversible balanced seal."
• Dynamic Seal: This seal is used to stop leakage past components, when the components are in relative motion.
• Lip Seal: This is considered to be a versatile and high-performance seal which is used for uniform, low-pressure sealing.
• Rubber Piston Seal: Rubber piston seals are used for better grip, with specified engravings.
• Rubber Hydraulic Seal: Hydraulic seals are exposed to hydraulic fluids and are designed for high-pressure dynamic applications.
• Rubber U Seal: U-Seal, an integral part of hydraulic and pneumatic systems, have a symmetrical lip profile with chamfered sealing edges.
• Rubber V Seal: This is a type of axial seal for shafts and bearings, which seal axially against a counterface. V seals are very reliable and effective against dust, water and oil splash and other media.
• Wiper Seal: The wiper seal is used to prevent the ingress of dirt, dust and other foreign bodies, therefore extending the working life of the rubber seal it is protecting.