I have a utensil that requires immediate kashering. I cannot wait 24 hours. Is there any way that this can be permitted?

As we mentioned in a previous Halacha Yomis, if one kashers a utensil with libun gamur (total burning – until all parts of it glow red), there is no need to wait 24 hours. However, this method is often impractical. There is another option. Poskim write that whenever a utensil only requires hagalah, it can instead be kashered with “libun kal” (light burning). This is performed by heating the inside of a utensil with a fire or burning coal until the back side of the utensil is hot enough to burn one’s hand. This is tested by singeing straw.

There is a disagreement among poskim as to how libun kal works. The Pri Migadim (Mishbetzos Zahav 452:4) writes that it expels the issur from the utensil. Accordingly, it is questionable if one can kasher with libun kal without first waiting 24 hours. However, the Shulchan Aruch Harav (451:10) writes that libun kal consumes the absorbed flavor. According to Shulchan Aruch Harav, one can kasher with libun kal without waiting 24 hours. Rav Schachter, Shlita ruled in accordance with the Shulchan Aruch Harav, and if one kashers with libun kal, there is no requirement to wait 24 hours.

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