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Acoustic Plaster Systems - Acoustement | Pyrok
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Acoustic Plaster Systems - Acoustement | Pyrok

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  • Use

    Interior, exterior
  • Applications

    Renovation projects, new builds, ceilings, walls
  • Characteristics

    Asbestos-free, high abuse resistance, easily cleaned, sound absorptive, non-combustable
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More about this product

Pyrok Acoustement are Architectural Acoustical Plasters which are utilized wherever decorative plaster finishes, sound absorption, durability and low maintenance are desired. Detailing Pyrok Acoustement products is similar to working with stucco and traditional three-coat plaster; they are adaptable to a variety of substrates and design configurations.

All Pyrok Acoustement products can be applied to different thicknesses to achieve optimal acoustical performance. Acoustement is readily matched and repaired, providing easy care regardless of the environment in which it is used. All plasters are 100% free from asbestos, mineral fibers, polystyrene and cellulose.

Which Acoustement Plaster to use:

Product description Characteristics Use
Acoustement 20 A 20 PCF (air-dried density) gypsum plaster/exfoliated vermiculite spray-applied formulation. The Smoothest of the Acoustement Finish with Sound Absorption. Interior renovation projects/new construction where abuse resistance is required e.g. hotel lobbies, atriums, schools, restaurants, commercial interiors. Use on suspended ceilings as a combination acoustical finish and decorative.
Acoustement 40 This product is a nominal 41 PCF (air-dried density) Portland cement/exfoliated vermiculite spray-applied formulation Great for Interior and Exterior Humid Environments Apply to unpainted concrete, masonry, galvanized metal deck and structural steel. Use for interior/exterior renovation and new construction e.g. transportation facilities, correctional projects, lobbies, atriums, tunnels, natatoriums, gymnasiums, manufacturing facilities, contact wall areas.
Acoustement Plaster 40 A 41 PCF (air-dried density) Portland cement/exfoliated vermiculite spray-applied formulation. A Durable Spray Rough-Finish or Semi-Finish with Sound Absorption

Use for interior renovation or new construction where contact and moderate abuse may occur e.g. hotel lobbies, atriums, gymnasiums, manufacturing facilities, contact wall areas. Can be used on suspended ceilings as a combination acoustical finish and decorative material or as a decorative finish only.


Technical Characteristics

  • Semi-smooth trowelled finishes
  • Cleanable by vacuum brushing or water washing (Acoustement 30 and 40)
  • Custom colorings
  • Can be painted without loss of sound absorbing performance
  • Exterior uses (Acoustement 30 and 40)
  • Non-combustible
  • On-site manufacturer supervision with pre-approved installers
  • Low life-cycle cost
  • UL fire ratings on metal decking and structural steel (Acoustement 30 and 40)

Sound Absorption Coefficient

On a solid backing with no air gap ASTM C 423

Absorption Coefficient @ 1/2”

Frequency 125 250 500 1000 2000 4000 NRC
Acoustement 20 0.11 0.30 0.36 0.46 0.73 0.99 0.50
Acoustement 40 0.01 0.20 0.43 0.68 0.75 0.80 0.50
Acoustement Plaster 40 0.08 0.11 0.28 0.57 0.97 0.91 0.50


Absorption Coefficient @ 1”

Frequency 125 250 500 1000 2000 4000 NRC
Acoustement 20 0.15 0.39 0.61 0.75 0.85 1.00 0.65
Acoustement 40 0.18 0.35 0.64 0.73 0.73 0.77 0.60
Acoustement Plaster 40 0.03 0.13 0.55 0.97 0.93 0.99 0.65

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