Acid Washing a Gunite or Concrete Swimming Pool
WARNING:
Never
Acid Wash a
Fiberglass
Swimming Pool or the
Walls
of a Fiberglass/Concrete Pool.
Call
the UGlassIt Help Line for More Information
at 800-676-8528
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Acid washing is performed for only three reasons. The first is to etch the surface of new concrete for the purpose of laminating some form of coating, i.e. marcite, resin, paint, etc. The second, and most common reason, is to remove stubborn stains that cannot be chemically removed. The third reason is to prepare the surface for
lamination of a new coating of paint or 2 part epoxy.
When resurfacing with fiberglass, this step is necessary only when the vinyl ester resin is laminating to new gunite,
concrete, or block. It could also be necessary
on gunite or concrete previously coated with a waterproofing substance such as two part epoxy.
Always follow the directions on the TSP
container
Three Step Process
The First Step - Wash the Pool
We recommend TSP Tri-sodium Phosphate
Use Tri-sodium
Phosphate (TSP) to scrub the surface. Mix
according to directions. One gallon mixed
properly will clean about 200 square feet.
Wet a long handled brush with the mixture
and scrub the walls in 10-20 feet sections.
Immediately rinse each section before
continuing. Do not permit mixture to dry
on the wall. Scrub the floor last
remembering to rinse as you go.
NOTE: For
new construction, this first washing
may be omitted.
The Second Step - Acid Wash the Pool
The acid washing
(or etching) chemical is Muriatic Acid which
is poured into a 5 gallon plastic pail.
First add the water to the pail, then add
the acid according to directions.
WARNING:
Always wear long gloves and goggles when
working with muriatic acid. The diluted
solution should be between 8% and 10%
strength. Do not exceed 10%. One gallon of
diluted solution will cover about 100 square
feet.
Brush solution
onto wall in sections. When the bubbling
stops, immediately rinse off the remaining
solution. Do not permit the solution to
dry on the wall. Do the bottom last.
When properly etched, the surface will feel
like it was lightly sanded with 220-260 grit
sandpaper.
The Third Step - Wash the Pool Again
Immediately after the
acid wash, the pool must be scrubbed once
again. This must be done right away
to neutralize the acid. Use exactly the
same procedure listed in Step One. The pool
must dry completely, before moving on to the
next step.
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ON OTHER WEB SITES: This
statement must be included: "This
information provided by Bill Nash at
UGlassIt
Pool Resurfacing" Bill is the founder of the do-it-yourself swimming pool resurfacing
industry and author of Pool Resurfacing Made Easy.
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Pool Resurfacing, Inc.
332 Bustleton Pike
Feasterville Trevose, PA 19053
215-355-5305
Toll Free: 800-676-8528
Copyright © 2003-2012 All rights reserved UGlassIt Pool Resurfacing, Inc. ®UGlassIt is a registered trademark of UGlassIt Pool Resurfacing, Inc. "Pool Resurfacing Made Easy" is a publication protected by copyright law. All rights reserved. All copyright and trademark violations will be prosecuted to maximum extent allowed under the law.
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