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When sealing granite counter tops, the pores in
the stone or the spaces between the crystals
that make up the surface of the stone are filled
with sealant with no trace of the sealant on the
outer surface. This is different from sealing
wooden floor or countertop surfaces, where a
protective coat is added to the outside. Sealing
granite counter tops helps resist stains and
keep its shine. Often moisture or various
liquids seep into these pores and stain the
surface. Sealing them prevents this seepage and
staining. However, a sealant does not protect
the stone from physical damage.
Natural stone like granite must be allowed to
breathe as well. Of course stones do not breathe
like we do, so what does the last statement
mean? Granite is made up of many layers of
crystals, and in order to maintain the integrity
of the stone, these crystals need to interact
with air and its components, particularly
oxygen. Also, any water that has already seeped
into the pores must be able to evaporate by
moving through these spaces until it reaches the
surface.
Research has shown that, the interaction between
the crystals of granite and the millions of
bacteria that reside in its pores is an
important aspect of the stone structure. These
bacteria play a vital role in maintaining the
integrity of the stone. Taking the above factors
into consideration, it is recommended that
Acrylic type sealants or impregnators be
avoided. These completely block the pores and
can kill the residing bacteria or inhibit the
movement of water vapor to the surface. This can
lead to the granite counter top developing a
crack if the underside becomes too wet. It also
becomes very difficult to remove such sealants
if applied in excess. As a result your granite
countertop may end up looking dull or
discolored.
It is best to use sealers are natural based
products and made up of fatty acids such as
soap, when sealing granite countertops. These
can be applied at the time of normal cleaning
process to top off the seal and clean at the
same time. These fatty acids fill up the pores
but are not as harsh or stubborn to remove as
acrylic sealants. They provide another source of
nutrients for the friendly bacteria and being
semi hard do not restrict the evaporation of
water.
Sealing granite countertops is a relatively easy
job and no special skill or knowledge is
required to apply the sealants. If you wish, you
can always call a local granite shop to do this
job, but either way, it is recommended to do it
at least once a year. |
