Renderoc HB45 high performance, fibre reinforced, medium weight mortar (R4) has been specifically engineered for vertical and overhead repair work. It can be applied in sections up to 40 mm thickness in vertical locations and up to 30 mm thickness in overhead locations in a single application without 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 HB45 can be quickly and efficiently applied by the wet spray technique. The material should not be applied at less than 10 mm thickness.