Then use one of the concrete patching mix like the one from quikrete.
How to fill a big hole in concrete wall.
Wet the surface and apply a concrete bonding agent apply the bonding agent inside the hole with a paintbrush.
Before attempting to fill a hole clear out loose concrete and other debris.
Wait for about 10 to 15 minutes or until it gets sticky.
An ideal patch to use for both purposes is hydraulic cement which expands to fill cracks and holes as it dries.
Repairing the holes in a concrete wall involves undercutting the hole.
Use a cold chisel and hammer to make the space wider underneath the hole.
Watco concrex vertical is specially formulated to repair damaged concrete pillars sills lintels beams render and stonework.
Fill the hole with the patching compound.
Apply a coat of concrete adhesive to the hole.
Concrete takes time to cure so keep the patch moist for several days for a stronger fix.
Remove loose material with a wire brush and blow out any remaining debris.
Mix it up to the consistency of peanut butter and fill what s left.
Spread a layer of patch mixture over the.
You ll want to fill so the foam is more or less even with the inside of the block.
Use the corner of a trowel or your finger to pack the compound into the hole making sure it is completely full.
Then mix the mortar fill in the hole and level it to blend it in with the surrounding structure.
The stuff expands pretty much so start at about a 50 fill and see where that gets you.
Apply at any depth without n.