Fine quality glue, made from fresh, selected animal trimmings. The gram strength of this glue ranges from 370-399. For best results, soak glue overnight. In the morning, cook glue under 100 degrees F for 30 minutes; then, turn heat up to 150 degrees F. Keep glue cooker well covered to prevent evaporation. Available in either a 4 ounce or 1 pound bag.