Caseback Gasket Compatible with Citizen

About

Ensure a watertight seal every time you close your watch with our premium replacement caseback gaskets for Citizen . The caseback gasket is your watch's first line of defense against humidity, dust, and water ingress. Over time, these rubber O-rings lose their elasticity and "set, " meaning they cannot be safely reused after the case is opened for a service or battery replacement. Our gaskets are manufactured from high-grade nitrile rubber (NBR), providing excellent resistance to oils, sweat, and salt water—essential for maintaining the longevity of your Eco-Drive or Miyota movement. Gasket Options for Citizen Models: Diver-Grade O-Rings: Thick-profile gaskets designed for the Promaster Marine series (NY0040, BN0150) to maintain ISO-standard 200m water resistance. Eco-Drive Slim Gaskets: Precision-molded, low-profile seals for the Stiletto , Corsair , and Drive collections. Large Diameter Seals: High-tension gaskets for oversized models like the Eco-Zilla , Skyhawk , and Altichron . Vintage Citizen Restorations: Hard-to-find gasket sizes for legacy Citizen Seven and 8110 Chronograph models.