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How to Stop Leaks in Concrete Walls

How to Stop Leaks in Concrete Walls


Repairing Leaks in Concrete & Masonry Walls. Cracks
or breaks in concrete or masonry basement walls can turn into active
water leaks as the soil around your foundation becomes saturated with rain or
irrigation water. Repairing leaks and preventing costly damage requires a
little preparation to the repair area and QUIKRETE Hydraulic Water-Stop
Cement. QUIKRETE Hydraulic Water-Stop Cement is a very rapid setting repair material made with
special fast-setting hydraulic cements. Hydraulic Water-Stop can permanently
stop an active water leak in as little as three to five minutes. However, proper crack preparation is essential to
achieving a successful repair. Using a masonry chisel and hammer, widen the crack to a
minimum width of about three quarter inch and then remove all loose material. Make sure the edges of the crack are cut
squarely. Hydraulic water stop expands as it hardens, locking
itself into place, so it’s important not to create v-shaped edges. Mix
hydraulic water stop at about four to four and a half parts water stop cement
to one part clean water. Always wear safety glasses and waterproof gloves
when working with hydraulic water stop or any other cement based product. Use a
margin trowel to thoroughly mix the material to a heavy putty consistency.
Make sure that the mix is uniform and lump free. If the mix is too wet, add additional water stop cement and
mix thoroughly. If the mix is to dry add small amounts of water sparingly and quickly. Hydraulic water stop sets extremely fast, so do not mix any more material that can
be used in two to three minutes. Once a putty consistency is achieved, take a handful of water stop in your
gloved hand and begin to work the material into a ball. You will feel the water stop cement
begin to get warm in your hand. Now, press the water stop cement into the
crack, using heavy pressure and hold in place for several seconds. After the
material becomes thumbprint hard, use a margin trowel to trim the patch to match
the contour of the surrounding surface. The water stopped repair can be painted
after seven days, with a water-based latex paint. Hydraulic Water-Stop can also be used
to repair leaks in swimming pools and fountains and the material can even set under water.

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