Hourdex is a modified hydraulic lime binder, manufactured by Saint Astier in France. Hourdex is based on NHL 5 with the addition of a small proportion of a grey low sulfate cement and additives to improve workability. Hourdex is classed as a “multiuse binder” meaning that when specified correctly, Hourdex can be used for a wide number of applications, such as: Building, pointing, renders, skews, chimney haunching and floor tiling. As a modified hydraulic lime, Hourdex develops its compressive strength and resistance to freeze thaw more quickly than a pure NHL. Hourdex can be mixed with appropriate well graded sands to produce M2, M4 and M6 mortars. Please consult our technical department for further guidance.
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HOURDEX DATA SHEET