Renderoc HB high build, polymer modified, cementitious repair mortar (R2), has been specifically engineered for vertical and overhead repair work. It can be applied in sections up to 80mm thickness in vertical locations and up to 50 mm thickness in overhead locations in a single application and without the use of formwork. Thicker sections can be achieved by the use of formwork or can be built up in layers. Deep pockets can sometimes be filled in a single application dependent on the configuration of the pocket and the volume of exposed reinforcing steel. Renderoc HB can be quickly and efficiently applied by the wet spray technique.