|1 - 4||$16.35|
|5 - 9||$15.95|
Our Closed Cell Foam comes in sheets, 36"x54", 13.5 ft².
Closed cell foam (CCF) is not an acoustical material. Its function is mechanical. It prevents objects from touching each other and conducting vibration.
The same features that give it durability under harsh conditions make CCF a very poor absorber. In addition, a material's thickness determines the frequencies it will absorb. You're looking for something at least 1/4 as thick as the wavelength of the target frequency. A material that's 1/8" or 1/4" thick would absorb sound at the very highest end of the audible range and above, if it's a good absorber, which CCF isn't.It does this while being impervious to moisture because each bubble in the material is sealed (closed). Picture a bunch of grapes, glued together where they make contact with each other.
* Please note that our current CCF is black. The previous version was gray and appears in photographs troughout this site.
Electron Microscope Images
Sound Deadener Showdown Closed Cell Foam
We use closed cell foam as a decoupler because we don't want it to absorb moisture and odors and because we want resistance to compression. For these features to be active, each cell needs to be completely closed or sealed. It's like a bunch of grapes. If this is true, the CCF will be impervious to moisture beyond the surface layer.
This is 1/8" Neoprene/EDPM closed cell foam. It's an ideal general purpose decoupler for this application. Because it has vinyl compatible content it can be tacked to the MLV using HH-66 Vinyl Contact Cement. Vinyl is difficult to bond to anything and this takes care of the problem.
This video compares what happens when Volara foam and Sound Deadener Showdown CCF are burned. Even when removed from the flame, the Volara sample burns until it consumed and drips flaming rockets of molten foam. The SDS sample extinguishes itself immeadiately after being removed from the flame. That's what you want.
|Size||36"x54"x.125" (13.5 ft²)|
|ASTM-D-1056-67 & 68 Grade #||SCE41|
|ASTM-D-1056-91 & 07 SAE J18-R7/92||2C1|
|Density (PCF Approx)||6 +-2|
|Compression Deflection @ 25%||2-5 PSI|
|Water absorb by Weight Max ASTM Method||5%|
|Temperature Resistance °F||-40-250|
|Elongation % Min||150|
|Tensile Strength Minimum||75 PSI|
|Flame Resistance UL 94 HF1, FMVSS302||PASS|
|Flame Resistance Canadian CAN/CSA C22.2 # 017-92||PASS|