Jahn M110 Historic Pointing Mortars have been designed to be used where other mortars have failed. Jahn M110 is a single-component, cementitious, mineral based pointing mortar that is specifically formulated for the restoration of limestone, sandstone and brick mortar joints. Jahn M110 contains no latex or acrylic bonding agents or additives, and is compatible with historic masonry. Each pointing mortar formula is designed to have a lower compressive strength than the surrounding masonry. Jahn M110 mortars perform well even in situations where previous methods and materials have failed due to repeated water and salt saturation. The material is completely vapor permeable and may be custom colored.