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Saint-Astier® NHL 2 - Chalk Lime - Cement-Free Natural Hydraulic Lime

Verified by manufacturer 3 months ago

Saint-Astier®

Cement-free, 100% pure natural hydraulic lime NHL 2, feebly hydraulic, ideal for soft substrates and when elasticity, low strength or high vapour exchange are desirable

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Application

Suitable for:

  • Masonry, consolidation.
  • Plastering, rendering, pointing.
  • Hemp plasters.
  • Decorative finishes, shelter coats.
  • Adobe, cob.

Description

Saint-Astier® NHL 2 - Chalk Lime is ideal for lathwork, grouting, rendering, pointing and plastering on soft substrates. Its workability allows very fine finishes.


Features and benefits:

  • Appropriate for both external and internal works in traditional buildings and sensitive heritage sites, as well as new builds.
  • Breathable and suitable for weaker structures where stronger mortars are not advised.
  • Designed to be resistant to sulphates and salts.
  • Reworkable within 24 hours of application.
  • Available in 25 kg bags and 1 ton pallets (40 bags).


Application guidelines:

  • Always test product on a small area before using.
  • Can be mixed in cement mixer. Application by spray gun possible.
  • Recommended working temperature between 8° C and 30° C.
  • Ensure high-suction substrates are thoroughly dampened before application. Avoid rapid drying due to high temperatures and strong winds by covering with hessian and curing with a light water mist as necessary. Re-seal open bags as soon as possible. 
  • Before repointing, ensure all dust and debris are removed by washing with a light water spray and the joints are dampened to the back of the joint.
  • For further mortar and render mix ratios and application guidelines, please contact SAINT-ASTIER®.

General information

Color

Other

Beige

Cream

White

Ivory

Finish

Natural

Material

Hydraulic lime

Shape

Formless

Length

Bespoke

Width

Bespoke

Height

Bespoke

Uniclass

Pr_20_31_12_39 Hydraulic limesPrimary

CAWS

F10/665 Pointing

Specification data - Hydraulic limes

Type of hydraulic lime

Natural hydraulic lime.

Standard

To BS EN 459-1.

Designation

NHL 2.

Constituents

Manufacturer's standard.

Guidance for specification option:

  • SO3: ≤2%.
  • Free lime: >55%.
  • Particle size: 90 µm: ≤15%; 200 µm: ≤2%.

Density

0.5 kg/L.

Compressive strength - 28 days

3.5 MPa.

Guidance for specification option:

Consult manufacturer's literature for further details.

Technical characteristics, other

Manufacturer's standard.

Guidance for specification option:

  • Stability: ≤2 mm.
  • Initial setting time: 5–6 hours.
  • Whiteness index: 76.
  • Residue at 0.09 mm: 5%.
  • Quicklime residue after slaking: <1%.
  • Surface cover: 11 000 cm² per gram.
  • Expansion: <1 mm.

Sustainability data

Contains Red List materials

No

Country of material origin

France

Material

Hydraulic lime

Literature

Saint-Astier® NHL 2 - Chalk Lime Technical Data Sheet

Saint-Astier® NHL 2 - Chalk Lime Technical Data Sheet