K-Bond Penetrating Acrylic Stone Adhesives is a great product that can be used to fill cracks and fissures in natural stone. It can also be applied to the back side of stone when applying mesh for strengthening the stone and to hold it in place.
When working with really fragile stone that has a tendency to flake off, this adhesive will stops the flakes from loosening.
It is also a good idea to apply it to fragile stone edges before polishing.
The typical hardening time for K-Bond Transparent Penetrating Acrylic Adhesive is about 2 hours.