The Acrylic Penetrating adhesive is a speciality acrylic used for filling cracks and crevasses of broken stone or fragile stone that you want to consolidate. It has the consistency of water and due to that, can penetrate into even the finest cracks. It will penetrate all the way through the stone before curing to produce a solid block of material that is substantially stronger and more stable. It is a water clear adhesive and is UV stable for outdoor use.