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SEPTEMBER 2002
EACO CHEM NEWS
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“Pain Free” removal
of sealers on glass.
EaCo Chem has a safe and simple system to
remove virtually any coating or sealer that has been deposited
on glass. Extensive testing was done using Grafex and SafeRestore
singularly and in combination to remove coatings and sealers
quickly without causing environmental harm or damage to the
worker. The testing was initiated due
to the success SafeRestore had on glass at the City Center tower
in Nashville, TN. |
SafeRestore successfully removed overspray of ProSoCo’s
Siloxane PD on the tower’s glass. The PD was left on the glass
for over a month and had reacted with the silica in the glass. The
removal method specified by ProSoCo states soap and water removal
that will only work if done immediately. The sealer tends to leave
a stain on the glass which SafeRestore removes.
During
the last twelve months we have looked at a wide variety of sealers,
coatings and consolidants and found that principally Graf-Ex
and SafeRestore in some special circumstances removes these
from glass surfaces. The categories of coatings that were evaluated
include: (1) anti-grafitti coatings, complex acrylic, (2) Silane/siloxane
water-proofers; water and solvent based, (3) acrylic water-proofers;
water and solvent based. The evaluation
procedure included a heavy application of each sealer/coating
on mirrored glass surface at the plant. They were removed at
different time intervals to see if the results remained consistent
over time. We concluded that in all cases the Graf-Ex removed
the coating with ease even after being on the surface for a
month. The test for complete removal was to spray water on the
glass and look for beading. The one qualifier is that silane/siloxane
products react with the glass and after removal left a stain
which one or two straight applications of SafeRestore was needed
to remove.
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Graffiti
Removal off of Limestone Using Stripper Cream
Application: First, adequately prewet the wall and then roll in the
Stripper Cream. This is done to create a reaction medium for the caustic
in the stripper. Rolling or brushing the stripper on helps push it
into the interstitial pores of the stone and begins the reaction with
the water to increase the speed of removal. The stripper may be sprayed
on and this would prove beneficial if there was a very large area
to be covered and very little protection required.
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Dilution: At higher temperatures,
higher dilutions of Stripper Cream may be appropriate. The contractor
should rely on either experience or test patches to determine
how far the product can be diluted and still be effective. Always
bear in mind that it is much more expensive to redo work because
of not allowing adequate dwell time or over-diluting product
than it is to do the job right once. |
Removal: Before actual removing, low pressure water
should be sprayed on the area and color run should be observed. If
the shadow does not release with low pressure, do not proceed. Reapply
in this rinsed area and allow longer dwell time. If adequate color
run is observed, begin pressure wash rinsing. Pressure from 700 to
3000 PSI is appropriate, but never use a nozzle of less than 25 Degrees
and care must be taken to not apply too much pressure if the shadow
is not released. Repeat the chemical application or switch to Graf-Ex
or Stripsol, whichever is best to remove any paint that Stripper Cream
does not remove. |
©
Copyright 2002 by EaCo Chem
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