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Description Dry spray structural repair concrete designed to give high strength, low rebound, low wastage and to maximise application thickness. Containing graded inert limestone aggregates and dust suppressants, webercem spray DS has conformity testing to BS EN 1504-3 and meets the requirements for a Class R4 repair product. Key Features Economical - low rebound Relatively low dust emission, no siliceous aggregates, no caustic accelerators High-build – up to 150mm thickness can be applied in one pass on vertical and overhead faces encapsulating existing steel reinforcement Low permeability to water and chlorides R4 repair product meeting the requirements of BS EN 1504-3 Complies with National Highways specifications for repairs to highway structures