Air Water Develops Highly Heat-Resistant FKM O-Ring on September 10, 2018 in Innovation Air Water Inc. (TYO:4088) has developed a highly heat-resistant new O-ring using general-purpose fluororubber (FKM). This was achieved via efforts…... Membership Required You must be a member to access this content.View Membership LevelsAlready a member? Log in here Continue Reading