This FireMaster® Duct Wrap 2x2+™ is a 2" thick, 7.0 pcf alkaline earth silicate wool refractory fiber blanket totally encapsulated with a polypropylene/foil scrim. This blanket is used as a flexible enclosure to protect grease ducts.
Tests ASTM E 84 (Fiber)
Flame Spread Index 5
Smoke Developed Index 5
ASTM E 84 (Scrim)
Flame Spread Index 10Smoke Developed Index 20
ICBO ES AC 101 (Section 5.4)
Reference Listed Design Section
Design No. Rating
CFD 504 F Pass 
