While it is a wet paste, fill your hairline or S-Crack in your ceramic piece. Work the paste into crack or opening with a small tool to achieve a tight fill. Let dry and fire. The paste can be sanded before it is fired to achieve a smooth flush surface. After the firing simply glaze over. Applying more glaze on the filler area is recommended as it may soak up more of your glaze than your bisque. Colors can be combined for custom matches.
Notes: Keep from freezing.