Winter 2026
“I would like to purchase a countertop which can be kashered for Pesach. What should I buy?”
“I moved into a house, and the previous owner was not Jewish. Can I kasher the countertop?”
The answer to these questions and variations thereof depends on the material from which the countertop is made. We will begin by addressing which materials can be kashered and which cannot; then describe the kashering process; and finally, conclude with guidelines for countertops that cannot be kashered.
Countertop Materials
Kitchen countertops can be made from a host of different materials. Some materials can be kashered, and some cannot. (See the chart in Fig. 1.)
With regard to stone countertops, there are two basic types:
► A natural stone slab – This is one large piece of natural stone. The slab is mined whole and left intact.
► An engineered stone composite – This consists of stone fragments which have been pressed and […]

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