To fill cracks up to about 1/4th inch, use polyurethane caulk.
The boxwork fins once filled cracks in the rock before the host cave formed.
They may fill cracks or crevices around the entrance with fur; the function of this behavior is unknown.
After filling the holes and cracks, apply a sealer to the blacktop.
The water then fills the empty spaces and cracks above that layer.
Repair the damaged area by filling any gaps or cracks with joint compound.
Most amateurs can fill cracks and repair shallow or small areas of stucco.
Wash the surface clean, allow to dry, and fill cracks with an exterior flexible stopper.
So it's important to fill holes and cracks in an uneven wall, then hang lining paper to provide a smooth backing.
How do you fill cracks in rendering?