Patching mix is made from vinyl portland cement and sand.
How to repair cut outs in cement basement floor.
Smooth the surface with either a trowel or a small float.
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Be advised however that an electric concrete cutting saw cuts dry and thus throws up an extraordinary amount of dust.
It covers cracks up to 1 2 inch wide.
To minimize floor patching later however rent an electric concrete cutting saw with a diamond blade to score around the opening.
Set the diamond blade on the concrete wet saw to a depth of 4 1 2 inches and cut along both chalk lines.
Shallower holes need a sand mix.
Dampen the area around the crack and then trowel on the mix.
Feather the edges to get the best appearance.
The holes have to be very clean.
Then moisten the floor with water.
Mix some cement all with water cement all is a high grade cement that is used to fix driveways and stairs and sticks very well to old concrete but it must be clean and fill in the holes with a spatula or trowel.
Holes 1 inch or deeper require a concrete mix with coarse crushed stone aggregate which bonds well with existing concrete.
You have to prep the edges correctly and use the right materials.
Then fill the remainder of the groove and smooth it over.
Add water to the resurfacer mix to get the consistency of pancake batter for the concrete crack filler.
Then finish the cut the sawblade rarely cuts all the way through with a hand sledge and a chisel.
Simply pouring wet concrete into a hole in your driveway sidewalk or basement floor won t make for a lasting repair.