HOURDEX 
A multi use binder St Astier Natural Hydraulic Limes (NHL) For building mortars, renders stipple and base coats, roofing, chimneys, floor tiling. Based on St. Astier natural hydraulic lime with addition of OPC and additives for highly workable and breathable mortars  

Mortar preparation:
Up to 5 minutes in conventional drum mixers.

Sand:
Clean, well graded 0-3mm (general). Lower or higher granulometries can be adopted.
Avoid monogranular sands. Sands for renders base coats should not be below 0-2mm.

Adequately dampen materials or background if too dry or with high suction. Do not work in temperatures below 5 ^oC or above 35 ^oC. The building materials or background should not be frosty or too hot or water saturated. Protect fresh mortars from frost, rain or strong direct sun. Storage: in dry store. Reseal open bags a.s.a.p

The above details are given for general information purposes and do not constitute a specification