Profile: Lafarge Cement UK specializes in building materials. Our product line includes cement, aggregates & concrete, asphalt, rock, stone, gravel, plaster boards, mortar mix and hydrated lime. Our Slablayer is a cement based material containing specially selected sand and cement for use under patio paving slabs. Our Sulfacrete is a Portland-fly ash cement with a high sulfate resistance and a moderate heat of hydration suitable for reducing damage to concrete, mortar & grout exposed to sulfate attack and minimizing the risk of alkali silica reaction.