Bore Doctor™ preserves and protects wood with a proprietary blend of plant derived oils, emulsifiers, and powerful antioxidants - it penetrates deeply and will not turn rancid. Many bore oils are clear and colorless light mineral oil (baby oil) which is not what instrument makers use to impregnate the wood during manufacture. They clog the pores of the wood and hinder moisture transfer - why use it? Bore Doctor™ will preserve your valuable instrument and maintain the dimensional stability of the wood. Bore Doctor™ holds and buffers the needed moisture level in the wood which retards the tendency to crack and split.