cayugad
I bought one once and was going to use it on my White... tried it once in the field and I have not seen it since - I have gone back to old method plastic wrap around the gun covering the breech....
I wrap several ft of it around a small wood dowel and have a repeatable supply while I am in the woods....
Here is a pic applied to a sidelock.... but the same idea over the breech/bolt area of a inline...