First determine if condensation rather than
leakage might be your problem. Moist air due to high summer humidity
or such factors as an imperfectly vented clothes drier, may condense
on cold basement walls. To check for this, tape a 1 foot square
piece of aluminum foil to the wall, making sure all four sides are
air tight. Remove it after two days and examine it. If moisture
is on the outside, your problem is condensation. Use a dehumidifier
or ventilate to eliminate condensation. If the foil that is facing
the wall contains moisture on the inside, than your problem is seepage,
follow the steps using QUIKRETE® Hydraulic Water-Stop Cement
first. (See Application Procedure Below) (Click
TOOLS AND MATERIALS NEEDED
vessel. A concrete mixing box is ideal. For smaller jobs a large
pail or similar container will do. Clean the area using a heavy
duty masonry paint brush or coarse-fiber calcimine brush. Ordinary
brushes are not tough enough for larger areas.
QUIKRETE® Heavy Duty Masonry Coating. Coverage
will range from 5 to 20 square feet per pound of mix, depending
on surface. Previously painted surfaces and second coats require
considerably less than new surfaces.
NOTE: A dry powder cement paint when mixed with water
fills and smooths the surface, becoming part of the wall. As a result,
it is superior to other types of cement paint that are premixed
SURFACES: Remove any paint, loose mortar, dirt, etc., with a scraper
or wire brush. If old paint has Portland cement base, remove only
the loose areas. For best results 75% of original surface should
be exposed to assure bonding.
NEW SURFACES: Scrub with wire
brush and water to remove any loose material. If wall does not come
completely clean, mix some tri-sodium phosphate with water.
ESPECIALLY SMOOTH SURFACES:
Surfaces such as poured concrete, may require etching with a 20-25%
solution of muriatic acid, followed by flushing with clean water.
MIXING AND APPLICATION
Pour paint into water and mix according to instructions
on package. Dampen surface just before applying paint. Apply with
a circular scrubbing motion to ensure penetration of waterproofing
ingredients. First coat should dry 24 to 48 hours before applying
second coat. QUIKRETE® Heavy Duty Masonry Coating continues
to cure and harden for one month. (Spray applications are also possible
with most types of spray equipment.) Do not use QUIKRETE® Waterproofing
Masonry Coating on floors.
* IF WALLS ARE ACTUALLY LEAKING, QUIKRETE®
Hydraulic Cement should be used first to plug holes and fill cracks.
It stops running water instantly and sets in 3 to 5 minutes.
REPAIRING LEAKING WALLS
cracks and holes, removing all loose material. Cut squarely or undercut
to a minimum depth and width of 3/4 inches. Do not create V-shaped
cuts. Cut out the joints between walls and floor (3/4 inch minimum)
and apply QUIKRETE® Hydraulic Cement, forming a U-shaped joint.
Mix only enough QUIKRETE® Hydraulic Cement for
a 3-minute application. With a wooden paddle mix 3 parts Hydraulic
Cement to 1 part clean water. Roll mixture between hands until it
is warm and starts to stiffen. Starting at the top of crack or hole,
force cement into place, using maximum pressure. Maintain pressure
for a few minutes until cement sets and leaking is stopped. Smooth
surfaces with clean water, using fingers, board or trowel. Keep
surface moist for 15 minutes. After thorough setting, entire area
should be painted with Heavy Duty Masonry Coating to ensure proper
OTHER USES FOR QUIKRETE® HYDRAULIC WATER-STOP
Repairing leaks in swimming pools, cisterns or any
concrete or masonry wall, Caulking and pointing chimneys, walls,
sills. Anchoring bolts and fixtures in concrete and masonry. Forming
an impervious seal around pipes and other metal fixtures.