Beeswax Frees Frozen Ground Glass Joints A frozen ground glass joint can often be freed by warming the joint to a temperature above the melting point of beeswax (about 65"C), applying the wax around the lip and allowing it to cool. The wax melts and penetrates the joint as it coals. Slight reheating will allow the d i s assembly of the joint. An alternate procedure is t o dip the frozen joint (for example, a buret stopcock) into a bath of melted beeswax. Residual wax can be cleared off the glassware by using warm (about 75°C) xylenes. The glassware either can be dipped into a xylene bath, or the solvent applied warm with a towel.
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