Product specification: pure and Natural Hydraulic Lime (NHL).  Contains no additives.
Conforms to European Norm EN 459 and French Norm NFP 15.311
Strength factor: 2 (Feebly  hydraulic)
Residue @ 0.09 mm: 5%
Density (volumetric weight) : typical  31.2 lbs/cu.ft
Available (free) lime Ca(OH)2 after slaking: 50-55%
Packing: 55lb. Bags     		Whiteness index:  76
Surface cover 362 sq.ft./oz
Expansion : < 3/64"
Residue of quick lime after slaking: <1%
Shelf life: 8-12 months kept sealed and dry

MORTARS
Compressive strength   -  PSI 
Elasticity Moduli (Mpa)
MIX RATIO  EN459*  1 : 2 1:2.5  1 : 3     1  :  2  1  :  2.5   1  :  3
7  DAYS    90 77 68        
28 DAYS   2.00* 215 198 197    9025  9800  9000
6  MONTHS    557 435 418   12600 12030 11800
12 MONTHS    580 420 420   12515 12030 11900
24 MONTHS    616 435 399   13375 12000 11750
Consumption for 1 cu. yd
 of mortar  (lbs. +/- 10%) 		  472 378 283        
                 
* Incoming European Norm EN 459 ( mortar ratio 1:1.3 with ISO 679 Sand) 
                 

Mixing: can be mixed in regular mortar mixers.

Application by spray gun: possible. Please consult us.

Working temperatures:  not below 400F or above 850F.  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.  Protect from frost, rain, direct sun and strong wind for a minimum of 96 hours.

SUITABLE FOR LATH WORK/INJECTION/GROUTING: see relevant sheets.
Reworking: possible within 24 hours.



Mortar composition

MASONRY/POINTING     1 VOLUME OF NHL 2  :   2 VOLUMES OF SAND
Choose well graded sands (#6 to #200).
See also “General Guidelines – Sands for NHL mortars”

RENDERING: on earth or friable supports, after preparation and cleaning, dampen with a 1:20 solution of  NHL2/water applied in 2 coats.

A. Scratch coat (1/8"-3/16")
3 VOLUMES OF NHL 2  :  5  VOLUMES OF SAND
  This coat is applied by casting on to a still damp but not over saturated support and is left as cast to provide good keying.
B. Undercoat (5/8"-3/4")
1 VOLUME OF NHL 2  :   2    VOLUMES OF SAND
 

Can be applied in 2 passes of min. 3/8". Second pass only after first is reasonably dry.

C. Finishing          ( 3/16")
1 VOLUME OF NHL 2  :    2.5 VOLUMES OF SAND
 The dosage / thickness may vary in accordance with the desired finish and the sand used. In smooth floated finishes if very fine sands containing clay are used the binder (NHL) quantity will be reduced. Please check with your St. Astier Distributor.

Please also refer to General Guidelines: NHL Renders.

The above details are given for information purposes only. Final dosages and application should be checked with our technicians. The Factory reserves the right to alter specifications.