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Proprietary multicoat plaster system with applied pearlescent colourwash, supplied and applied by Armourcoat Ltd.

  • Self-finishing, with non-directional open texture and partial honed surface.
  • Translucent, water-based colourwash finish. Choice of applied pearlescent colours. Appearance may vary with angle of view and lighting conditions. Obtain samples to confirm effect.
  • Suitable for application to a range of substrates.
  • Internal use. (External use possible in sheltered locations in limited colour range).


  • British fire test result: CLASS 0 AS DEFINED IN PARAGRAPH a12(B) of Approved Document B, ‘Fire Safety’, to the Building Regulations 1991.
  • BS476: Part7: 1997 Class 1 surface spread of flame.
  • System is water vapour permeable and is suitable as a finish for traditional plastered masonry, including historic buildings.
  • Not suitable for application to substrates with high water content.
  • 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 when tested using Elcometer 3120 Shore Durometer D: 60.
  • Wet scrub resistance exceeding 10000 cycles to ASTM D 2486.
  • Spread of flame to ASTM E 84 - 98: Class 1.
  • Compressive strength - 28N/mm2
  • Mould and mildew resistant. Tested to ASTM D 3273 and ASTM D 3274.
  • VOC Content to ASTM D3960: 0 grams/litre


- Substrate:

  • Generally suitable for application to plastered or rendered masonry such as block, brick or concrete and to taped and skimmed boards such as Bluclad, plasterboard, GRG (glassfibre reinforced gypsum), primed MDF and with care on previously decorated (but not papered) surfaces. Consult manufacturer.
  • Surface to be true, flat and even, free of curing compounds, dust and other impurities, such as oil, grease and salts.
  • Substrate to be prepared by others. General information is available for selection or preparation of suitable materials. Detailed consultation with supplier is also recommended to ensure best results.
  • Plaster beads to be installed by others. Prior consultation with supplier is recommended to ensure appropriate detailing.
  • Will not obscure cracked or uneven substrates.

- Materials and number of coats:

Selection of materials and number of coats determined by supplier to achieve required finish.

  • 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. Can be combined with reinforcement mesh. Taped and filled joints not required. Top layer of plasterboard to be left by main contractor with 3-4mm open joints prior to application of Armourcoat Anti Crack Skim Coat.
  • Top coat: Two–three coats Pitted finish (total approx 2–2.5 mm).
  • Partly self polishing when trowelled.
  • Allow plaster to dry for at least 24 hours under good drying conditions before application of colourwash.
  • Colourwash to be applied by sponge float, acrylic decorators' sponge or a lint free cotton cloth. Consult manufacturer information.

- Thickness:

  • Finished thickness of 1.5-2mm.


  • Time required on site varies with finish criteria and work conditions.
  • Number of coats may vary with desired finish.
  • Application time may vary with desired finish, as well as accessibility of the working area.
  • Drying time for each coat varies with temperature, humidity, suction and airflow.
  • Adjacent finishes may need to be protected during application, particularly during sanding of dark colours.
  • May need to be protected during completion of adjacent building works.

General information
Specification data
Product Reference

Pitted Polished Plaster Pearlescent

Preparatory reinforcing skimcoat

Armourcoat Anti-crack ___

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


L0352 W2694

L4156 W2694

L4149 W2694

L0329 W3494

L0345 W3494

L0386 W3494

L0295 W2694

L0311 W2694

L0360 W2694

L0303 W3494

L0378 W3494

L0337 W3494

As sample BUK ___

Input reference as marked on reverse of sample.

Surface texture


As sample BUK ___

Input reference as marked on reverse of sample.

Product Options


  • Standard or bespoke colours available.
  • Material colour is consistent but texture creates highlights and shadows which may vary with lighting and viewing angle. Specifiers are recommended to obtain samples.
  • Approximate colour matching is possible to colour reference systems or samples. Some limitations may apply, particularly for intense colours.
  • Enhanced custom colours are available using Armourcoat Colourwashes

Surface finish:

  • Texture is variable but sensitive to site conditions, including temperature, humidity and airflow.
  • Final coat to be left overnight or until completely dry, before waxing or colour washing.

Control joints:

  • Joints are advised between each day's work. Maximum daywork area is determined by number of staff working together, accessibility, environmental conditions and finish required. Consult supplier.
  • In addition to work joints, need for expansion joints may be determined by the structural engineer. Detailing to be agreed with supplier.
  • Consistency of finish requires consistency of application. Special consideration is necessary for areas of constrained access.

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