Natural rubber (Polyisoprene)
Natural rubber is one of the most commonly used engineering rubbers because of the large variety of compounds available. Generally a low cost product, natural rubber has a long life, low compression set, is abrasion and tear resistant and has excellent bonding capabilities.
It is primarily used for o-rings, rubber seals, vibration isolators and automotive diaphragms.
Styrene-Butadiene (SBR) is a copolymer of styrene and butadiene. Its properties are similar to that of natural rubber but it is not as strong. Once moulded, it is most frequently used in hydraulic brake system seals, diaphragms and plumbing applications. It is very resilient against brake fluids and water.
Ethylene-propylene compounds are typically developed with a sulphur or peroxide cure system, to make them suitable for high temperature exposure and more resistant to compression.
These compounds are used to seal in hot water and steam and have a good resistance to mild acids, detergents, alkalis, silicone oils, greases, ketones and alcohols. They are commonly used for brake systems, ozone exposure applications and cooling systems.
Neoprene (Polychloroprene rubber)
Neoprene was one of the first synthetic rubbers to be developed as an oil resistance substitute for natural rubber. Its unique properties make it one of the most versatile compounds. It has superior chemical, oil and heat resistance when compared to other rubbers and is second only to natural rubber for fatigue resistance.
Neoprene is widely used across engineering industries for o-rings, rubber seals, marine environments, fridge seals and for rubber to metal bonding.
Nitrile rubber (Acrylonitrilebutadiene)
Nitrile is the most popular elastomer in the seal industry. By varying the proportions of its material properties, its capabilities for being heat, oil and fuel resistant can be changed. Nitrile has an excellent compression set, does not tear easily and is resistant to abrasion.