silica gel

I've heard rumors that over a long period of time, you risk drying out and cracking of wooden grips with dessicant gels.


There is supposed to be another substance whose name unfortunately escapes me which you put in your gun safe and it leaches out an airborn protectant which coats all exposed parts of the gun, prevents rust, and does not dry out the wood. I would like to get this stuff if I can ever find out what it is.