The resistance of seal materials to ultraviolet (UV) radiation is an important consideration, especially in applications where seals are exposed to sunlight or other sources of UV radiation. UV exposure over time can lead to degradation, discoloration, and loss of mechanical properties in some materials. Here are common seal materials and their general resistance to UV radiation:
EPDM (Ethylene Propylene Diene Monomer):
EPDM is generally known for its good resistance to UV radiation.
It is commonly used in outdoor applications and is known for its weatherability.
Nitrile (NBR):
Nitrile rubber may have fair to good resistance to UV radiation depending on the specific formulation.
Some formulations of nitrile rubber may be prone to degradation when exposed to prolonged sunlight.
Viton (Fluorocarbon):
Viton is known for its excellent chemical resistance, but its resistance to UV radiation can vary.
Special formulations of Viton with improved resistance to UV exposure are available.
Silicone:
Silicone rubber generally has good resistance to UV radiation.
It is often used in outdoor and high-temperature applications where UV exposure is a concern.
Neoprene:
Neoprene rubber has fair resistance to UV radiation.
It is commonly used in outdoor applications, but prolonged exposure to sunlight may lead to some degradation over time.
Polyurethane (PU):
Polyurethane materials can have varying resistance to UV radiation depending on the formulation.
UV-resistant formulations of polyurethane are available for outdoor applications.
PTFE (Polytetrafluoroethylene):
PTFE has excellent resistance to UV radiation.
It is often used in applications where exposure to sunlight or outdoor conditions is a concern.
Natural Rubber:
Natural rubber generally has fair resistance to UV radiation.
It may undergo degradation when exposed to prolonged sunlight.
Butyl Rubber:
Butyl rubber exhibits good resistance to UV radiation.
It is often used in applications where exposure to sunlight is a consideration.
Hypalon (CSM - Chlorosulfonated Polyethylene):
Hypalon is known for its excellent weather resistance, including resistance to UV radiation.
It is commonly used in outdoor applications where prolonged exposure to sunlight is expected.
It's important to note that the actual performance of a seal material under UV exposure can be influenced by various factors, including the specific formulation of the material, the intensity and duration of UV exposure, and environmental conditions. When selecting seal materials for applications with UV exposure, it's advisable to consult with material suppliers, manufacturers, or engineers who can provide specific information on the UV resistance of the chosen material and recommend suitable alternatives if necessary. Additionally, protective measures, such as coatings or coverings, can sometimes be employed to enhance the UV resistance of seals in specific applications.
See more
https://www.a2zseals.com/oil-seals/
https://www.a2zseals.com/seal-kit/
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https://www.a2zseals.com/nok-oil-seals/
https://www.a2zseals.com/nok-seals/
https://www.a2zseals.com/crane-seal-kit/
https://www.a2zseals.com/seal-kits-and-oil-seals/
https://www.a2zseals.com/wp-content/uploads/2023/08/repair-seal-kit.pdf