Natural Hydraulic lime suitable for use with Soft-Medium brick & natural stone. **NHL 3.5 Natural Hydraulic Lime:- Used principally to make Mortar Durability Class’s 3-6 Depending on ratio of lime to sand, but may be used on all but the weakest backgrounds.

Pure and Natural Hydraulic Lime (NHL 3.5)

Product Data St Astier Natural Hydraulic Limes (NHL) Conforms to European Norms EN 459 and BS 459 Strength factor: 3.5 (Moderately hydraulic) Residue @ 0.09 mm: 6.5% Density (volumetric weight) : typical 650gr / litre Available (free) lime after slaking Ca(OH)2: 25% + Packing: 25kg. Bags Contains no additives. Whiteness index: 72 Surface cover (cm2pergram): 9000 Expansion : < 1mm Residue of quick lime after slaking: < 1%

Shelf life: 8-12 months kept sealed and dry

Mixing: can be mixed in cement mixers.

Application by spray gun: possible. Please consult us.

Working temperatures: not below 5oC or above 30oC. Make sure that high suction materials are thoroughly dampened before application. Avoid rapid drying due to high temperatures or strong winds by curing with a light water mist several times a day if necessary.

SUITABLE FOR LATH WORK / LIME CONCRETE/INJECTION/GROUTING 

Reworking: possible within 12 hours Mortar composition:

MASONRY/POINTING/ CAPPING/ BEDDING/ ASHLAR Binder: sand ratio: from 1:1.5 to 1:3 depending on the support/background conditions, the size of the joint and the fineness of the sand. Always use well graded sands ( 3 - 4mm down to 75 microns). See also "Applications & Good Working Practices Sands for Lime Mortars" . RENDERING A. Scratch coat (3-5mm) 1 VOLUME OF NHL 3.5 : 1.5 VOLUMES OF SAND - Cast on

B. Undercoat (15-20mm) 1 VOLUME OF NHL 3.5 : 2 VOLUMES OF SAND*

C. Finishing (5-10mm) 1 VOLUME OF NHL 3.5 : 2.5 VOLUMES OF SAND With very fine sands possibly containing clays the binder content may have to be reduced. *At this dosage the consumption is approx. 0.35kg. of NHL 3.5 per m2 for each mm thickness.