KNM
Class A Fire-Rated, Pipe & Duct Wrap
A commonly used noise control material, limp mass barrier is available in a variety of configurations –1/2-, 1-, and 2-pound per square foot; reinforced, non-reinforced; foil-covered, clear, etc. Building code stipulates requirements for flame spread and smoke developed indices depending on where a limp mass barrier may be installed. Kinetics Noise Control tested several configurations of limp mass barrier per ASTM E84-15b and offers designers three (3) CLASS A product solutions.
Resources
Testing Results
KNM 100B - Sound Test- Lab
ASTM E90-09
Tested as free hanging barrier
STC 26
| Freq. | 31.5 | 40 | 50 | 63 | 80 | 100 | 125 | 160 | 200 |
| TL | 10 | 13 | 10 | 5 | 10 | 19 | 16 | 15 | 15 |
| Freq. | 250 | 315 | 400 | 500 | 630 | 800 | 1K | 1.25K | 1.6K |
| TL | 16 | 18 | 20 | 21 | 23 | 24 | 26 | 28 | 30 |
| Freq. | 2K | 2.5K | 3.15K | 4K | 5K | 6.3K | 8K | 10K | 12.5K |
| TL | 32 | 33 | 34 | 36 | 38 | 40 | 41 | 42 | 41 |
KNM 100B - Fire Test
ASTM E84-15b
Flame Spread- 15
Smoke Developed- 300
Class A
KNM 100AL - Sound Test- Lab
ASTM E90-09
Tested as free hanging barrier
STC 26
| Freq. | 31.5 | 40 | 50 | 63 | 80 | 100 | 125 | 160 | 200 |
| TL | 10 | 13 | 11 | 5 | 11 | 18 | 15 | 17 | 16 |
| Freq. | 250 | 315 | 400 | 500 | 630 | 800 | 1K | 1.25K | 1.6K |
| TL | 17 | 18 | 20 | 21 | 23 | 24 | 26 | 28 | 30 |
| Freq. | 2K | 2.5K | 3.15K | 4K | 5K | 6.3K | 8K | 10K | 12.5K |
| TL | 31 | 33 | 34 | 36 | 38 | 40 | 41 | 42 | 41 |
KNM 100AL - Fire Test
ASTM E84-15b
Flame Spread- 25
Smoke Developed- 250
Class A
KNM 200AL - Sound Test- Lab
ASTM E90-09
200B (no foil) tested as free hanging barrier
STC 31
| Freq. | 40 | 50 | 63 | 80 | 100 | 125 | 160 | 200 | 250 |
| TL | 18 | 17 | 12 | 10 | 22 | 21 | 21 | 21 | 22 |
| Freq. | 315 | 400 | 500 | 630 | 800 | 1K | 1.25K | 1.6K |
| TL | 24 | 25 | 27 | 29 | 30 | 32 | 34 | 35 |
| Freq. | 2K | 2.5K | 3.15K | 4K | 5K | 6.3K | 8K | 10K |
| TL | 37 | 39 | 41 | 42 | 45 | 47 | 49 | 52 |
KNM 200AL - Fire Test
ASTM E84-15b
Flame Spread- 25
Smoke Developed- 450
Class A
Submittal Documents
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KNM is a limp mass-loaded vinyl barrier material used for controlling break out noise from pipe or duct. KNM-AL adds a layer of reinforced aluminum foil facing on one side to increase mechanical strength, weatherability, and improved fire retardancy.
Flame spread and smoke developed indices as stipulated in building codes determine where limp mass barriers, properly tested per ASTM E84, may be installed. Kinetics Noise Control tested several configurations of limp mass barriers per ASTM E84-15b and offers designers three Class A product solutions.
Products are easily applied around already installed pipe and duct insulation. Factory supplied tape can be used to assist with the installation.
KNM-100B | STC 26
One-pound per square foot, nonreinforced, limp mass barrier. Available in 54" x 60' rolls.
Fire Testing per ASTM E84-15b
Class A
Flame Spread 15
Smoke Developed 300
KNM-100AL | STC 26
Reinforced aluminum foil facing is added to the 100B Core enabling easier handling and higher self-supporting weight capacity. Available in 54" x 60' rolls.
Fire Testing per ASTM E84-15b
Class A
Flame Spread 25
Smoke Developed 250
KNM-200AL | STC 31
A two-pound per square foot barrier with reinforced aluminum foil face, available in 54" x 30' rolls.
Fire Testing per ASTM E84-15b
Class A
Flame Spread 25
Smoke Developed 450