Johns Manville MinWool® Safing is available plain or with a foil facing vapor retarder on one face. Nonorganic and moisture-resistant, MinWool Safing prevents smoke and flames from passing through openings in fire-rated assemblies. It is designed to provide a fire-rated seal when installed between the spandrel panel and floor slab in commercial curtainwall systems.
Fire-Resistant: Melting point in excess of 2000˚F (1093˚C). Unfaced: Flame Spread of 0 and Smoke Developed of 0. Faced: Flame Spread of 25 or less and Smoke Developed of 5 or less.
Durable Inorganic Glass: No growth of fungi. No sustaining of vermin.
|ASTM Standards||ASTM C665|| Unfaced: Type I
Faced: Type III, Class A, Category 1
|Flame Spread||ASTM E84|| Unfaced: 0
Faced: ≤ 25
|Smoke Development||ASTM E84|| Unfaced: 0
Faced: ≤ 5
|Water Vapor Permeance Facing||ASTM E96||0.02 perms, maximum|
|Water Vapor Sorption||ASTM C1104||< 1% by weight; < 0.2% by volume at 120ºF (49ºC), 95% RH|
|Odor Emission||ASTM C1304||Pass|
|Fungi Resistance||ASTM C1338||Pass|
|Combustion Characteristics||ASTM E136||Pass|
|ASTM C612||Type 1–4|