Saint-Astier® NHL 2

Technical data sheet

Conforms to European Norm EN 459 and BS 459
Strength factor: 2 (Feebly hydraulic)
Residue @ 0.09 mm: 5%
Density (volumetric weight) : typical 500 gr. / litre
Available (free) lime Ca(OH)2 after slaking: 50-55%
Packing: 25kg. Bags

Contains no additives
Whiteness index: 76
Surface cover (cm2 per gram): 11000
Expansion : < 1mm
Residue of quick lime after slaking: <1%
Shelf life: 8-12 months kept sealed and dry

MORTARS Compressive strength - N/mm2 Elasticity Moduli (Mpa)
MIX RATIO
EN459*
1 : 2
1:2.5
1 : 3
1 : 2
1 : 2.5
1 : 3
7 DAYS
0.62
0.53
0.47
28 DAYS
2.00*
1.48
1.36
1.25
9025
9800
9000
6 MONTHS
3.84
3.00
2.88
12600
12030
11800
12 MONTHS
4.00
2.90
2.90
12515
12030
11900
24 MONTHS
4.25
3.00
2.75
13375
12000
11750
Consumption for 1m3 of mortar (kg. +/- 10%)
280
224
168
* EN/BS 459 ( mortar ratio 1:1 by volume with ISO 679 Sand)

Suitable for
Lath work, grouting, rendering, pointing, plastering, ashlar. Before starting, always try on a small test area.

Mixing
It can be mixed in cement mixers.

Application
Application by spray gun is possible. Please consult us.

Working temperatures
Not below 8oC 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. Protect from frost, rain, direct sun and strong wind
See “Protecting Lime Mortar”.

Reworking
Possible within 24 hours.

Mortar composition

1) For masonry and pointing 
NHL 2/sand 1:2
Choose well graded sands (3 mm: 75 microns). See Sands for lime mortars.

2) For rendering
On earth or friable supports, after preparation and cleaning, dampen with a 1:20 solution of NHL 2/water applied in 2 coats.

A. Scratch coat (3 – 4 mm)
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 (15-20 mm)
1 VOLUME OF NHL 2
2 VOLUMES OF SAND

Can be applied in 2 passes of minimum 1 cm. Second pass only after first is reasonably dry.

C. Finishing ( 5mm)
1 VOLUME OF NHL 2
2.5 VOLUMES OF SAND

The dosage and 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.