Pearl Glue is a traditional wood glue used for veneering, joinery and antique restoration. It is made from natural bone/hide. Soak the glue overnight in about 3 to 4 times its volume of water. Heat this solution in a double pot until all the glue has melted. If the glue is too thick add some more water to solution. Do not allow to boil. The glue may be reheated two or three times. Old or dirty glue must be discarded and a fresh solution made.