This eminently Hydraulic lime is used for applications such as building or repairing wall head copings, pointing and parging the water table or foundation of a building and making lime concrete.
Sea-bearing walls can be built or repaired with NHL 5 since it is immune to sulphate attack. Sulphate attack normally occurs in mortar prepared with OPC or when white cement has been introduced into synthetically created hydraulic lime to ensure a hydraulic set. The high percentage of tri-calcium aluminates found in OPC negatively reacts with the sulphates. This reaction produces an overall expansion and eventual disintegration of the mortar or concrete, especially in marine environments.