Leatherstone Polished Plaster



  • Suitable for internal application to a range of substrates. External use is possible in sheltered locations with limited colour range.
  • Generally suitable for plastered or rendered masonry such as block, brick or concrete, taped and skimmed boards such as Bluclad, plasterboard, glassfibre reinforced gypsum (GRG), primed medium density fibreboard (MDF) and on previously decorated (but not papered) surfaces.
  • Not suitable for application to substrates with high water content.

Materials and number of coats:

  • Where surfaces are of uneven suction: One coat Armourcoat K40 Primer by brush or roller.
  • Where surfaces are not uniformly flat or smooth: Two coats Armourcoat K124 or K149 Keycoat (each typically 0.5 mm) applied by trowel over primer.
  • On unsealed plasterboard or gypsum plaster: One coat Armourcoat Anti Crack Skim Coat Plaster (typically 3–5 mm) applied by trowel.
  • Topcoat: Two/ three coats Pitted finish (approximate total 2–2.5 mm).

Colourwash to be applied by sponge float, acrylic decorators' sponge or a lint-free cotton cloth. Allow plaster to dry for at least 24 hours under good drying conditions before application of colourwash.


Partly self-polishing, proprietary multicoat plaster system with a seamless finish combining lightly polished stone with distinctive pitting and surface movement, non-directional open texture and partial honed surface.

Features and benefits:

  • British fire test result: Class 0 (as defined in paragraph a12(B) of Building Regulations (E&W) Approved Document B).
  • Surface spread of flame (to BS 476-7): Class 1.
  • System is water vapour permeable and is suitable as a finish for traditional plastered masonry, including historic buildings.
  • Pencil hardness (to ASTM D 3363): 5H+, surface hardness increases with age and carbonation of the material.
  • Impact resistance (to ASTM D 2794): Two-inch pounds.
  • Shore D hardness (using Elcometer 3120 Shore Durometer D): 60.
  • Wet scrub resistance (to ASTM D 2486): Exceeding 10 000 cycles.
  • Spread of flame (to ASTM E 84 - 98): Class 1.
  • Compressive strength: 28 N/mm².
  • Mould and mildew resistance (to ASTM D 3273 and ASTM D 3274): Resistant.
  • VOC Content (to ASTM D3960): 0 g/L.

General information


Texture is variable but sensitive to site conditions, including temperature, humidity and airflow.


Self-finishing, with non-directional open texture and partial honed surface.


Choice of applied colours available.



Hydrated lime

Crushed marble


1.5–2 mm

Finished thickness.


Ten years

Ten year warranty for internal applications.

Uniclass 2015

Pr_35_31_64_47 Lime plastersPrimary


M20/220 Multicoat proprietary plaster

M20/330 Proprietary lime:sand

M60/165 Multicoloured coating

M60/18 Special coating

M60/195 Special coating

Specification data - Lime plasters Enhanced data

Product Reference

Leatherstone Polished Plaster


LS 10844.

LS 10845.

LS 10846.

LS 10847.

LS 10848.

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Preparatory reinforcing skimcoat

Not required.

Armourcoat Anti-crack.

Applied to pre-beaded plasterboard substrates where joints are left open in the top layer by 3–4 mm.

Environmental information

Recycled content


Contains 40% pre-consumer recycled marble.

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