Products
Details
Sponge Features
NFPA Class A, UBC Class 1
Fire resistance, heat shielding
Does not ignite at temperatures below 1120ºF
Excellent heat insulation properties; no flaming drip
Excellent sound control characteristics in a wide range of frequencies
Material Specifications
ASTM E-84, Steiner Tunnel Test: Flame Spread: 5, Smoke Density: 50
UL 1715, Corner Burn Test: Passes
NFPA 101
Applications
Interior Partition Closure
Metal Deck Flute Closure Plug
Clean Room Ceiling Tile Seal
When fire classified foam is required
Williams Everlastic® Fire Classified Closures 1715
This product is a compressible, lightweight, open cell melamine sponge.
Typical Physical Properties
| Property | Test Method | Typical Values |
|---|---|---|
| Density | ASTM D – 1667 | 0.7 pounds / cubic foot |
| Tensile Strength | ASTM D3574 | 8 psi |
| Tear Strength | ASTM F3574 | 0.3 pounds / inch |
| Elongation | ASTM D – 3574 | 8% |
| Indentation load deflection: Stress strain with 40% compression Single deflection Repetitive deflection |
ASTM D3574 | 130.5 lbs 65.25 lbs |
| Heat Conductivity K Factor R value |
ASTM C177 | .24 at 50ºF 4.2 |
| Temperature Stability | 0 to 302ºF | |
| Chemical Resistance | Organic solvents and various diluted acids and alkali |
Sound Absorption
| Finish | Thickness | Coefficients per ASTM C423-90A | |||||||
|---|---|---|---|---|---|---|---|---|---|
| 125hz | 250hz | 500hz | 1kHz | 2kHz | 4kHz | NRC | Mounting Type | ||
| Natural | 1-1/2″ | 0.08 | 0.29 | 0.73 | 0.94 | 0.97 | 0.89 | 0.75 | B |
| (White & Light Gray) | 2″ | 0.05 | 0.31 | 0.81 | 1.01 | 0.99 | 0.95 | 0.8 | A |