How to Cement Over the Outside Cement Flooring on a Balcony

Mix muriatic acid with water in a bucket. Use a mixture of 10 parts water to one part acid then clean the surface of the concrete you need to patch. Rub it into the face with a sponge then clean off any residue. Let it dry for at least 24 hours before proceeding.

Put some cement into the clean bucket and mix it with water until you achieve a paint-like consistency. Mix it with a paintbrush to break down the smallest particles of dry mix and ensure they blend together with the water. Use another bucket for your concrete mixture and prepare it according to the manufacturer’s directions.

Paint the cement onto the area to be patched. Apply it liberally so that it fills all of the voids and cracks to coat the entire surface with a thin layer of runny cement.

Spread the concrete mix on top of the cement paint and smooth it down with a flat metal trowel until you achieve the desired finish surface. Let the area dry for a minimum of 72 hours before using the area.