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Waterplug is a one-component, quick-setting, Portland-cement-based hydraulic repair mortar that instantly stops running water through holes or cracks in concrete or masonry. It expands as it sets to lock into place even under constant water pressure.

Master Builders MasterSeal 590 Hydraulic Cement 10 lb Gray

Ace Hardware
Ace Hardware
$28.99
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Zoro.com
Zoro.com
$32.79
13% Cash Backwas 2%
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Product details

Waterplug is a one-component, quick-setting, Portland-cement-based hydraulic repair mortar that instantly stops running water through holes or cracks in concrete or masonry. It expands as it sets to lock into place even under constant water pressure.
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