I noticed a hairline crack (1 inch) in the rosewood back of a Silver Creek D170. It is a result of the wood itself (not a damage crack) as it is on both sides (left & right panels) in the same spot. It appears it was there when they finished the guitar because the finish is beveled up over the crack but the finish is still unbroken. I want to place some adhesive on the inside of the guitar to stabilize it and prevent it from splitting further.
What would you recommend using?