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JUST SAY NO
TO COAL TAR EMULSION SEALERS
No
matter if you, the homeowner, or a sealcoating company applies it, the
coal tar emulsion sealer contains approximately 25% coal tar pitch.
You also get 15% clays, 10% fly ash and up to 50% water or more.
The texture is controlled by altering the viscosity and changing the PH
levels with latex additives.
That
is right! Coal tar emulsion can be up to
50%
water!
Liquid asphalt:
Notice in the photo above that there
is no water or clay in asphalt.
ASPHALT PAVEMENT
is made of sand, stone, and liquid asphalt. Driveway stone does not need
protection from the elements, and neither does sand. That leaves
the liquid asphalt, that naturally repels water, and when new, can
protect itself. The liquid asphalt is the binder that holds the stone
and sand together. These three products together make asphalt
pavement, as we all know it by. Over time, the liquid asphalt will dry
out causing the asphalt pavement to become brittle and crack, eventually
allowing the loss of sand and stone.
Only
rejuvenation
sealers can penetrate the pavement and renew and recondition the liquid
asphalt by restoring the
asphaltenes
and
maltenes.
Common logic should tell you that water
(the coal tar
emulsion sealer)
and oil
(the
petroleum based asphalt pavement)
don’t mix!
So
how can coal tar/latex products renew the asphalt? The answer is
simple,
they can’t.
What they do is sit on top of the asphalt, depriving the asphalt from
breathing, expanding and contracting, ultimately ruining the asphalt by
causing surface cracks. If you don’t believe me, take a walk through any
neighborhood, look closely were these products have been "broomed" on
driveways two years ago and you will see for yourself. Asphalt
does not need sealing; it needs renewing. (See below.)
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