Can You Kasher Quartz Countertops?

What is Quartz?

Quartz countertops, also known as engineered stone, are made from ground natural quartz crystals combined with resins and pigments. The quartz content typically ranges from 90-94%. The resins bind the quartz particles together to form a hard, non-porous surface.

The non-porous nature of quartz makes it very low maintenance compared to natural stone countertops like granite or marble. Quartz doesn’t require annual sealing and is highly resistant to stains, scratches and heat. It’s an ideal countertop material for kosher kitchens.

Can Quartz Be Kashered for Passover?

Yes, quartz countertops can be kashered for Passover with the proper process. Unlike natural stone, quartz doesn’t absorb liquids and is considered a non-porous surface according to halacha (Jewish law).

However, the binding resins used in quartz can create a film on the surface that needs to be addressed when kashering. With the right preparations, quartz countertops can be made kosher for Passover.

How to Kasher Quartz Countertops for Passover

Here is the recommended process from rabbis and kosher experts for kashering quartz countertops for Passover:

Clean the Surface

Thoroughly clean every part of the quartz countertop that needs to be kashered. Use soapy water or a stone cleaner to remove any residual food, grease or dirt.

Pay extra attention to small cracks, seams and edges. You want the surface completely free of any chametz residues.

Kasher with Boiling Water

Pour boiling water over every part of the quartz surface that requires kashering. The water must be at a rolling boil when it makes contact with the countertop.

You can boil a large pot of water on your stove and then carefully pour it over sections of the countertop. Or use a hot water kettle with a pour spout for better control.

The goal is to pour boiling water across every inch of the quartz surface, including edges and seams. This helps remove any residual chametz on a microscopic level.

Use a Blowtorch

After pouring the boiling water, go over every part of the quartz with a blowtorch. This extra step is recommended by many rabbis because the high heat of the blowtorch can burn off any remaining invisible chametz or residue.

Be extremely careful when using a blowtorch and keep it constantly moving over the surface. Have a spray bottle of water nearby in case of emergencies.

Cover Surface

Once the quartz countertop has been thoroughly cleaned and kashered, cover it with a protective layer. You can use contact paper, butcher block paper, foil or a tablecloth.

This keeps the koshered surface protected throughout Passover from any spills or chametz contact. Re-cover the surface if the protective layer gets removed or contaminated.

Kashering Quartz Sinks

Quartz sinks should be treated the same as quartz countertops when kashering for Passover. Follow these steps:

  • Clean the sink thoroughly with soap, water and scrubbing to remove all dirt and residue
  • Pour boiling water over every surface of the sink, including faucets and fittings
  • Use a blowtorch to heat any cracks, crevices or hard to reach areas
  • Rinse the kashered sink with cold water
  • Keep sink covered when not in use during Passover

The key is ensuring no chametz remains in the quartz material or fittings. Repair any cracked fittings or leaky seals around your sink before the kashering process.

Oven Cleaners and Quartz Countertops

Some recommend using an industrial oven cleaner to clean quartz prior to kashering for Passover. However, oven cleaners like Easy Off can damage and dull the surface of quartz. Avoid using them directly on quartz.

The boiling water and blow torch method is safer and just as effective for proper kashering.

Kashering Other Kitchen Surfaces

Don’t forget to also kasher other kitchen surfaces for Passover including:

  • Natural stone countertops
  • Stainless steel sinks and appliances
  • Glass stovetops
  • Porcelain, ceramic or enamel pots and pans
  • Wood or laminate cabinets

Each material requires a specific cleaning and kashering process. Consult your rabbi on the best way to make all your kitchen surfaces kosher for Passover.

Maintaining Kashrut After Kashering

Once your quartz countertops and kitchen are kosher for Passover, be vigilant about maintaining kashrut. Just one spill of chametz can contaminate a koshered surface. Keep extra foil, wrap and protective coverings handy to immediately cover any contaminated areas.

Have a meaningful and joyous Passover! With proper preparation, your quartz countertops can stay kosher throughout the holiday.

Frequently Asked Questions

Can you use an oven cleaner on quartz countertops when kashering for Passover?

No, oven cleaners like Easy Off should be avoided on quartz. The caustic chemicals can damage and dull the surface. Boiling water and a blowtorch are safer and equally effective.

How long does kashering quartz countertops take?

Plan on kashering taking 10-15 minutes for an average sized countertop. Have all your supplies ready and work efficiently. Taking the proper time results in koshering done right.

Should you kasher a quartz sink differently than the countertops?

No, quartz sinks are kashered exactly the same. Thoroughly clean, pour over boiling water, blowtorch all areas, rinse and cover. Pay special attention around the drain and fittings.

Can quartz countertops be used immediately after kashering for Passover?

Yes, quartz countertops and sinks can be used immediately after the kashering process is complete. Just be sure to keep them covered with protective layers when not in use.

Do you need to re-kasher quartz if it becomes contaminated during Passover?

If a kashered quartz surface comes into contact with chametz during Passover, it must be cleaned and kashered again. Start the process over including using boiling water and a blowtorch.


Kashering quartz countertops and sinks for Passover involves thoroughly cleaning, pouring boiling water over all surfaces, blowtorching and covering. With proper preparation, quartz can retain its kosher status throughout the holiday. Taking the time to properly kasher quartz kitchen surfaces keeps Passover traditions alive.