Green Render Sealer can be used over all masonry surfaces to provide excellent system adhesion and integrity with long term durability. The primer forms a barrier over alkali substrates limiting the reaction with atmospheric Carbon Dioxide thus reducing the formation of unsightly white deposits or 'efflorescence' on the surface typically associated with coating of highly alkaline 'fresh' masonry. The primer allows for reduced substrate curing time prior to coating, thus fast tracking project work and reducing overall project costs and construction time