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PHONSTOP™ Ceiling and Wall Tiles

acoustical ceiling
  • Made from 100% Recycled Glass
  • Exceptional Acoustical Properties
  • Two Styles – Adhere to Walls and Ceilings or Lay-In Standard 15/16″ Ceiling Grid System
  • PHONSTOP Plaster provides a seamless appearance
  • Can be custom colored on-site using non-bridging paints

PHONSTOP Ceiling and Wall Tiles are made from 100% recycled glass, sintered to form rigid, lightweight and porous sound absorbers. PHONSTOP products have exceptional acoustical properties and are easy to install indoors or outdoors.

Product Testing & Information

Product Specs


PHONSTOP Ceiling and Wall Tiles are made from 100% recycled glass sintered to form rigid, lightweight and porous sound absorbers. Tiles are ASTM 84 Class 1 (A) fire-rated and offered for adhesive (PHONSTOP V) and lay-in ceiling grid (PHONSTOP E) applications.

Other PHONSTOP Products Include:
PHONSTOP pa81 or pa101 Adhesive (pa81 for concrete, masonry and drywall; pa101 for plywood and metal surfaces)
PHONSTOP pa85 Plaster (for seamless, monolithic appearance)
PHONSTOP pt17 Primer
PHONSTOP pt13 Sealer (for weather-exposed conditions)


PHONSTOP V – Adhesive Applications on Walls and Ceilings

24″×24″×2″ Thickness (610×610×50mm)
24″×48″×2″ Thickness (610×1220×50mm)
Tiles offer two edge options: One face of the tiles feature 3/8″ (9 mm) chamfer beveled edges, while the reverse face has square edges.

PHONSTOP E – Ceiling Grid Applications
24″×24″×1″ Thickness Nominal (604×604×25mm)
24″×48″×1″ Thickness Nominal (604×1213×25mm)
Slightly Beveled Square Edge



Adheres directly to walls or ceilings
Roll on PHONSTOP pt17 Primer to existing substrate. Apply PHONSTOP pa81 or pa101 Adhesive using 3/8″ tooth trowel to the back of each tile (be careful not to get adhesive on the visible tile face)

Create a seamless, monolithic appearance by using the square edge tile face and rolling on a layer of PHONSTOP pt17 Primer; then trowel two layers of PHONSTOP pa85 Plaster

In outdoor, weather-exposed conditions, apply PHONSTOP Sealer for added durability

Lay-in standard 15/16″ ceiling grid system Sound Absorption Material 100% recycled glass

acoustical ceiling


Physical Data
Material 100% Recycled Glass
Density (ASTM D1622-08) 16.79 lbs./ft
Fire Resistance (ASTM E 84) Class 1
Flame Spread (ASTM E 84) 0
Smoke Density (ASTM E 84) 0
Compression Strength 165 psi
Thermal Resistance (ASTM C518-04) Effective R Value 3.24


Noise Reduction Coefficient – Phonstop
Description Frequency (Hz)
125 250 500 1000 2000 4000 NRC
PHONSTOP V – Test ASTM C423-90a – Mounting Type A
2″ (50 mm) – Adhered & Painted 0.14 0.60 1.09 0.96 1.02 1.3 0.90
2″ (50 mm) – Adhered Without Space Between Tiles 0.16 0.63 1.15 0.91 0.98 0.99 0.90
2″ (50 mm) – Adhered & Plastered 0.26 0.75 0.86 0.62 0.66 0.57 0.70
PHONSTOP E – Test ASTM C423-90a – Mounting Type E
1″ (25 mm) 0.45 0.55 0.60 0.75 0.80 0.85 0.70