Onyx is a natural stone formed from dissolved limestone that redeposits. When used in the kitchen, it makes an attractive countertop. Before using your onyx countertop, it is important to seal it. After that, you should reapply the sealant every one to three years. Because onyx is a soft stone, it can become easily scratched or appear dull. Sealing the onyx also helps prevent acids from tomatoes and other food or from cleaners from etching it. Clean the surface of the onyx with a mixture of warm water and a special onyx cleaner.

Instructions as follows:

Firstly, clean the surface of the onyx countertop with a mixture of warm water and a special onyx cleaner.

Secondly, wipe the excess water off the surface. Allow the onyx to air dry for one hour.

Thirdly, apply a thin layer of a food-safe impregnating sealer, using a clean towel. Work in small sections at a time.

Fourthly, leave the sealer on the onyx for three to five minutes.

Fifthly, wipe the excess food-safe sealant off with a clean lint-free rag. Buff the surface with a dry towel.

Sixthly, repeat Steps 3 through 5 until you have sealed the entire surface of your onyx countertop.

Seventhly, wait 24 hours, then do the water test. Drop natural stone water on the onyx countertop. If the water runs, repeat Steps 3 through 5