As well as on the surfaces of very old.

Primers to the basis that vinyl — acrylic copolymer (emulsion) is used to waterproof ceilings. Emulsion primer is used to cover on loose surfaces.

As well as on the surfaces of very old. The emulsion primer applied to the ceiling forms a dense film, which is very difficult to destroy. The film easily holds the loose surface from scattering, provides strength and adhesion to future coating layers.