AFAIK Usually those silicone sprays aren't something you want to put in your guns.
The one you want is the TM Silicone spray:
This stuff from Redwolf
or this stuff from ICS
Personally I just use RC Shock oil from the local hobby store (or you can get the Airsoft Innovation stuff that's like 1.5 wt. silicone oil). What specific application do you want the silicone spray for that you can't just use regular silicone oil that's not in spray form?