need help fast

I use moly graph grease on the breech o rings. I use silicone grease also but have found that it is not that great of a lubricant. I have been using 90d viton o rings. Urethane o rings have poor compression set which means they don’t return to specs. So setting on the barrel and breech is probably not the best thing for them. Viton has good compression set and oil resistant.

also, the silicone grease that is sold at the auto parts stores for your spark plugs/boots connection is the same stuff and is safe to use.

I was at Home Depot this week in the plumbing section buying some o-rings and they sell it there. The o-rings all come in bubble packages now, no box where you can just buy a single o-ring anymore. They hang them on a wall with all the other little plumbing gizmos. On the wall with all the other bubble packs they a small flip open container of silicone grease. Same thing I bought at the dive shop but cheaper.

Greases- bad, at least not optimal. Some ive used get gunky/gummy. The pure is white with a consistency kinda like jelly. Dive shops would have it, and maybe industrial supply, i havent run into it in hardware shops, not a mass consumer item.