If the repair is inside a finished space recoat or paint the ceiling where the repair was done.
Can you repair a concrete ceiling.
New materials are durable strong expand as they dry and create a permanent repair.
Then spray on two to three light coats of good bye cracks.
Or you can fill the cracks with a vinyl concrete patching compound applied and smoothed with a putty knife.
New types of materials help repair concrete ceilings.
Clean up spills immediately.
Start by cleaning loose material out of the crack and fill it with joint compound.
Remove any loose debris from the crack and surrounding area with a wire brush and broom.
The soil can set causing the foundation to shift and concrete ceiling crack repair becomes necessary.
Something in the support structure or in the concrete itself is failing.
It forms an elastic film that stretches and contracts along with the crack.
Cracks or damage to concrete ceilings indicate a problem.
Narrow cracks can be filled with a masonry crack filler that comes in a cartridge designed to be used in a caulking gun.
The repair compound will have pushed up a little so you ll need a coarse grade sandpaper designed for metal or concrete to smooth the surface for painting or sealing.
If the damage is greater than 1 3 of the depth steel bars may need to be installed and a full depth restoration may be required.
It works best on hairline cracks but it s worth a try on wider cracks too.
Keep the area well ventilated.
Ordinary cement won t work because as it dries it shrinks.
When the spalling damage is shallower than 1 3 of the concrete s thickness the concrete usually can receive a surface repair.