Hey guys first time poster here I was just disassembling my older Cressi SL 70 and found what looked like white lithium grease around the o-rings of the main body tube I haven't been able to find any information on weather or not that is a common practice I was going to use a silicone based grease in these areas but if white lithium is the common practice from the factory I may do that instead. Thank you in advance!!