I use this stuff for the rim side of tubes as well as tire bead when installing .
I'm sure you are aware of the necessity to align the stem perpendicular to the rim before adding pressure.
I also spray the side walls of four cars for winter storage to ward off dry rot .
A little bit of the spray goes a long way so one can covers several applications .
Last yr I put new off shore tubes in the front of a T bucket roadster w/ no problem --just lucky I guess ?
http://www.amazon.com/3M-08897-Silic...silicone+spray