Hey JR...
I use Snap silicone spray quite abit around the shop...
For sheaths I use it mainlly on blades with Kraton or similar handles.. I use it when a blade is having an extremely tough time going in and out of a sheath...
The difference is like night and day,,and can actually make an otherwise tight knife pop/slide right out of the sheath if you aren't careful...
Do not spray silicone directly into a sheath as once the liqud evaporates it will leave a sticky residue on the inside of the sheath,,which will attract debris...
Rather spray it on your finger and slightly wipe the inside of the "Mouth" of the sheath with a little bit of silicone...Does a nice job at this...
Sometimes I will use it on folders,,but find it can also make them sticky,,until it's worked in...
ttyle
Eric...