Air-Lock® 181
Air-Lock® 181 is a non-flammable, non-toxic, safe to use water based duct sealant / mastic. It is reinforced with fibers for superior gap sealing performance. This non-sag formula won't drip off, is easy to spread, and may be used inside and outside on low to high pressure systems. It is waterproof and resistant to ultraviolet light when cured. For use with rigid fiberglass air ducts and non-metallic flexible duct. Air-Lock® 181 cures to a tough flexible film which will expand and contract with temperature changes. It may be used for sealing systems up to 25" W.G. It has an in service range between -20 degrees F and 400 degrees F. Cleans easily while wet with soap and water. This product contains a combination of biocides which protects Air-Lock® from mold growth.White10.5 ounce cartridge