ID Velvet is a good silicone-based lubricant. The price may be a little high for some, but a little goes a long way with this lube. It lubricates well and you hardly notice it after application because it feels so clean.
The most helpful critical review
Premium price, not so premium performance
ID Velvet is a nice silicone lube. Not my favorite but a small drop goes a long way and it's slippery and slick without that gelatinous water based lube feeling. Reapplication may be needed, however, since the slick "feeling" goes away, even though you're still covered in lube.