Acraglas is acid proof, waterproof, has superior insulating qualities, resists alkalies and will not rot or deteriorate. Acraglas is highly resistant to impact and will not dent. Acraglas has a shelf life of over 5 years! Acraglas has been so compounded by research engineers that you have ample time to properly seat the barreled action in the inletted stock before it starts to harden. Acraglas completely seals the inletted side of the gun stock against all moisture, gun oils, solvents and sprays. Sell Unit Each.