- Hydrated Lime For Use In Cement, Lime and Sand Mortars Rugby® Hydrated Lime is a non-hydraulic hydrated lime which complies with the high calcium classification of BS EN 459-1 CL 90-S. It is used extensively in agricultural/horticultural applications, and building construction. Rugby® Hydrated Lime is manufactured by calcining a high calcium limestone in carefully controlled conditions. The quicklime produced is then crushed and hydrated to produce a fine powder with a loose bulk density of 600 kg/m3 (typical neutralising value 74% CaO). - Benefits : - Workability and Water Retention Improves workability and water retention in mortar - Better Bonding and Reduced Cracking Provides better bond and reduces risk of cracking