It works best on hairline cracks but it s worth a try on wider cracks too.
Can you repair a concrete ceiling.
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.
Then spray on two to three light coats of good bye cracks.
Start by cleaning loose material out of the crack and fill it with joint compound.
The concrete or support structure are beginning to fail.
When the spalling damage is shallower than 1 3 of the concrete s thickness the concrete usually can receive a surface repair.
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.
Something in the support structure or in the concrete itself is failing.
Wear gloves when handling epoxy based repair compound.
Ordinary cement won t work because as it dries it shrinks.
Clean up spills immediately.
Sand over the top of the repair to blend it into the ceiling.
New types of materials help repair concrete ceilings.
It forms an elastic film that stretches and contracts along with the crack.
The soil can set causing the foundation to shift and concrete ceiling crack repair becomes necessary.
Or you can fill the cracks with a vinyl concrete patching compound applied and smoothed with a putty knife.
Keep the area well ventilated.
Remove any loose debris from the crack and surrounding area with a wire brush and broom.