Cerflon is a brand name for a composite of PTFE and Boron Nitride (Ceramic) and was issued US patent 5,783,308. PTFE was invented at DuPont in 1938 and branded Teflon. PTFE is an extremely slippery material and is widely used in many consumer and industrial applications. The addition of very fine particles of BN significantly increases the durability and wear properties for all applications using PTFE. This increase in durability also provides a longer lasting lubrication benefit and increased heat transfer properties. Therefore, PTFE reinforced with Boron Nitride has a much broader and useful application range. And, most importantly, Cerflon, in most cases, costs no more than PTFE!