✓MasterSeal 501 can be used for water tanks, water towers, reservoirs, dams, canals, harbours, concrete pipes... In summary, to help the retention of water in storage, treatment an transportation units. ✓ construction joints, sea defence walls, bridge decks, jetties and pontoons. advantages of masterseal 501 ✓Provides total and permanent waterproofing properties by becoming an integral part of the structure to which it is applied. ✓Active ingredients will not delaminate, peel off or wear away. ✓Protects concrete and reinforcement against corrosive waterborne substances. ✓Crystalline action is reactivated by contact with water providing permanent and continuous protection. ✓Effective against both positive and negative water pressure. applied in two coats and have a coverage of 18sqm .