Which is the shelf life of 20 years?

• A. O-ring
• B. V-ring
• C. Gasket
• D. Viton O-ring

Answer: (D)

Long-term usability of seals depends on material aging and storage conditions. Viton O-rings, made from fluorocarbon elastomer, resist aging, heat, and chemical attack much better than many other elastomers. When stored in their original packaging, in a cool, dry place away from sunlight and ozone, Viton O-rings can maintain their properties for about 20 years. This long shelf life is especially valuable in ALREMP hardware where seals may sit in inventory for extended periods, yet still need to perform reliably when deployed. The other options represent different seal types or materials with different aging characteristics and typically do not carry the same 20-year shelf-life rating. Therefore, the Viton O-ring is the one associated with a 20-year shelf life.