Secil started business in 1930 and has a huge contribution to the construction market in Portugal. Secil and Mike Wye & Associates have collaborated to provide this high quality Portuguese natural hydraulic lime to the UK.
Natural hydraulic lime is supplied in three European classifications: NHL 2, NHL 3.5 and NHL 5. These classifications are based on the compressive strength of laboratory mortars after 28 days. These are often somewhat misleadingly termed ‘feebly hydraulic’, ‘moderately hydraulic’ and ’eminently hydraulic’ because the qualifying strength bands for each classification overlap each other.