Early Strength-Gaining Cementitious Repair Mortar. Repair or resurfacing of concrete or mortar. Application on concrete and mortar: horizontal, vertical and overhead applications Below/ above or on grade Easy-to-use – Just add water and mix Easy to trowel and to finish Surface may be open to pedestrian traffic after 4 or 5 hours Add Sika Latex R for enhanced performance and repairs (applied in layers) up to 76 mm (3 in)