You said a 2mm x 1mm O-ring ? Have you confirmed that its the correct size Cig, I'll take your word that it works though. Where to get, or just Google it ?
Nope, can't confirm it, sorry. It was someone's comment from way back. I used boiled linseed oil...goes on in a liquid state, then semi-hardens just lock locktite blue. I used it as a thread locker for spoke nipples back in my mountain bike racing days. It kept spokes from loosening but allowed them to adjusted when necessary.