The wall needs to be moist so that the old concrete won t leach moisture out of the mortar that you apply and cause the repair to fail.
Pour concrete wall patch.
Use a wire brush check on amazon to brush both ends of the walls and then try a vacuum pump to suck out all debris in.
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Fill a bucket with the mortar and then use a hand trowel to apply it.
The only way to repair foundation wall cracks successfully is by the injection process.
It is a pre mixed concrete patch that enables you to deal with small to large holes just after filling and scraping the rest wait for 24 hours to harden then wash it with water.
Apply small amounts of water over a short period until it has absorbed water deep into the wall.
Because basement floors are poured after the walls are poured the concrete where they meet doesn t always bond completely and this is a common spot for a crack to appear when the house settles.
Once that has been done you may want to start mixing your mortar check on amazon.