HHM is a dry preblended bagged mortar product comprising fine sand and traditional binders. In dry form HHM is off white in colour and has a fine grained/powdery texture. Water needs to be added to the dry bagged mortar to produce a light coloured pointing/bedding mortar.
HHM has been formulated for use as a pointing/repair material in historic structures. Typical examples would include stone masonry structures such as bridges, viaducts, listed/protected buildings, waterways structures including canals, churches and other ancient monuments.