Limelite Heritage Grout St. Paul’s Limelite Heritage Grout St. Paul's is a low strength grout formulated specifically for the restoration St. Paul's Cathedral and has since been used on a number of high profile historic buildings. Limelite Heritage Grout St. Pancras Limelite Heritage Grout St. Pancras is a pre-blended, hydraulic lime based structural grout designed for injection into masonry substrates to stabilise the structure. Limelite Heritage Grout Winchester Limelite Heritage Grout Winchester is a breathable and flexible hydraulic lime based grout designed for the replacement of degraded lime mortar within historic masonry. Limelite Canal Grout Limelite Canal Grout is used for canal walls, sealing foundations, tunnels, vaults and manholes from water. Limelite LPB221 Heritage Grout Limelite LPB221 Heritage Grout is a cement-free grout designed to be used as a void filler in listed monuments and historic buildings where minimal strength is required.