NBS Source
SMET NHL 5

Application

Particularly suited for ecological new build, restoration and preservation works in extreme weather environments and exposed areas.

Description

SMET NHL 5 is a high-quality pure natural hydraulic lime binder, produced under an ISO 9001 and ISO 14001 quality system to BS EN 459-1. The eminent hydraulic strength development of SMET NHL 5 makes it suitable for producing lime mortars for masonry work, rendering, plastering base coats, and limecrete in extreme weather environments and exposed areas. The product’s special composition allows the mortar product to breathe and also permits constant hygrometric exchange between the substrate and the environment.


Features and benefits:

  • Historical, gypsum and cement-free NHL.
  • Produces highly breathable mortars.
  • Highly sulfate resistant.
  • Low-stress hardening process.
  • Excellent subsequent hardening.
  • High water retention and elasticity in produced mortars.
  • Excellent bond properties to masonry.
  • Whiteness: 5.3 Y.
  • Fineness at 90 μ: 4%.
  • Fineness at 200 μ: 1.%.
  • Blaine value: 0.91 cm²/g.
  • Free lime content: Approx. 18.5%.
  • SO3: Approx. 1.23%.
  • EN 459-1.
  • CE marked.

General information

Uniclass

Pr_20_31_12_39 Hydraulic limesPrimary

CAWS

M20/310 Lime:sand

M20/320 Lime:sand roughcast (harling)

Product range

Natural Hydraulic Lime

Specification data - Hydraulic limes Enhanced data

Type of hydraulic lime

Natural hydraulic lime.

Standard

To BS EN 459-1.

Designation

NHL 5.

Mechanical strength

28 days

5.34 MPa (approximately).

Expansion

0.772 mm.

Density

Bulk: 2.75 g/cm³; Real: 8856 g/cm³.

  • Bulk density: 2.75 g/cm³.
  • Real density: 8856 g/cm³.

Literature

SMET & Haldane Fisher - Natural Hydraulic Lime Brochure

SMET & Haldane Fisher - Natural Hydraulic Lime Brochure

TDS SMET NHL 5

TDS SMET NHL 5

Case studies

Rainey Restoration Ltd | SMET NHL 5 | Repointing of Norman Tower

Rainey Restoration Ltd | SMET NHL 5 | Repointing of Norman Tower

Similar products from SMET Building Products Ltd

SMET NHL 2

SMET NHL 2

SMET NHL 3.5

SMET NHL 3.5