Rapid Set Mortar is suitable for interior and exterior installation, repair and maintenance projects. It is ideal for the installation of sanitary fittings, drainage systems and the maintenance of concrete floors, paths and steps. Rapid Set Mortar sets underwater making it especially suitable for emergency repairs to drains. It is suitable for: patch repairs to concrete floors, paths, steps etc., emergency repairs to drains, fixing sanitary installations, filling service apertures around pipes and conduits.