Anyone here ever used Gorilla Glue to repair hairline cracks in rifle stocks. It's a polyurethane glue that is supposedly comparable to epoxies. It's about the only thing I've found to be viscous enough to work all the way into the crack before setting up. I had to hold open the crack with 2 toothpicks to get the stuff in there. Sure, I know some folks use compressed air to force epoxy into cracks, but with my compressor, a little oil residue would also make its way into the crack, causing a weaker bond than I'd like to have. Gorilla Glue expands to 3-4 times the surface application during the reaction/setup stage, which requires water or moisture for activation, allowing it to expand further into the crack to be bonded. According to their tech dept, in lab tests, it had a holding strength of 3200 psi when used on Birch wood. We will see how it holds up after some rifle recoil and jarring around. I've used Gorilla Glue around the house on broken chair legs, tabletops, and varoius other things, and it has yet to fail. If it works as other professional strength glues does, it will actually be stronger than the wood itself.
P.S. Just a tip for those interested. My stock is Walnut and needed some moisture in the hairline crack to activate the glue. I found that holding the stock(open crack with toothpicks) over boiling water on the stovetop will put the moisture needed right up in that little crack.
P.S. Just a tip for those interested. My stock is Walnut and needed some moisture in the hairline crack to activate the glue. I found that holding the stock(open crack with toothpicks) over boiling water on the stovetop will put the moisture needed right up in that little crack.