- Q.How should I seal marble
and granite countertops? To be used in a kitchen, a
surface should be waterproof, heat resistant, stain
resistant, and safe for food preparation.
A. Stone countertops should
indeed be sealed, but it is not a one-step process.
Marble especially is very porous and requires
repeated coats of a sealer. The brand I like best
is Masterpiece Marble Care System
(cleaner, sealer, polish) available from
Ceramaseal, Box 33322, Seattle, WA 98133;
206/365-9402. It reportedly provides all of the
features you require.
The homeowner should apply a thin coat of sealer
to marble about three times a week for the first
month, once every two weeks for the next three
months, and then once about every two or three
months. Granite, being denser, requires fewer
coats. The sealer is absorbed into the pores of the
stone, and after the first year the stone is
impervious to almost everything.