never met a seal yet who needed lubricating after Ive chatted to it
but I did used to do a lot of diving with a guy who was a vet. He brought along the stuff that ya stick on yer arm before disappearing up the transom end of cows. We used it on diving masks to get a good seal once. Trouble was it sealed itself that tight you couldnt release the pressure by breathing into it and it needed prising off your face when back in the boat. Walked around with a red imprint of the mask on face for rest of the day.