First, this type of cement will cure under water, which means that you don’t have to dry out the leak before stopping it. Second, is that hydraulic cement expands as it cures, so it tightens up cracks and seals the gaps around pipes.

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Hydraulic Cement for Leaky Basements  VIDEO  - 2Hydraulic Cement for Leaky Basements  VIDEO  - 37Hydraulic Cement for Leaky Basements  VIDEO  - 66