Cementation systems generally are available as ready to apply. The two components systems consist of a resin base which is normally an acrylic co-polymer with water proofing properties and a cementations powered roller or by spray. A fabric scrim we suggested over expansion joints to protect the layer from tensile thermal expansion on the roof. Cementation systems are also applied over spray applied polyurethane thermal insulation as a protective layer, as these systems possess high resistance to UV rays. Since application skills require are minimum, they popular among maintenance contractors. However, it should be noted that the waterproofing and durability membrane and care should be exercised in choosing one with adequate co-polymer content.