It’s non-toxic, water-based, solvent free, and is suitable for residential use. Duct-Seal™ 321 in an all purpose industrial grade duct sealant for all types of metal duct, glass fiber duct board, and flex duct, as well as duct fabric and flexible tubing run outs. PROseal® Water-Based Duct Sealant. This non-toxic water-based product is solvent free and is suitable for residential use … This non-toxic water based product is solvent free and is suitable for residential use. Duct-Seal™ 321 in an all purpose industrial grade duct sealant for all types of metal duct, glass fiber duct board and flex duct, as well as duct fabric and flexible tubing runouts. USDA, EPA and FDA Approved. DUCT-SEAL 321 includes UV inhibitors for extended outdoor exposure and built-in fiber reinforcement for exceptional strength. Duct-Seal 321 is an all-purpose industrial-grade duct sealant for all types of metal duct, fiberglass duct board, duct fabric and flex duct. It can be shaped by hand to any form and reused if necessary. It includes UV inhibitors for extended outdoor exposure and built-in fiber reinforcement for added strength. It includes UV inhibitors for extended outdoor exposure and built-in fiber reinforcement for added strength. Duct-Seal™ 321 Grey, 1 gallon pail, is an all purpose industrial grade duct sealant for all types of metal duct, glass fiber duct board, and flex duct, as well as duct fabric and flexible tubing runouts. It includes UV inhibitors for extended outdoor exposure and built-in fiber reinforcement for added strength. It includes UV inhibitors for extended outdoor exposure and built-in fiber reinforcement for added strength. This non-toxic water-based product is solvent free and is suitable for residential use. PROseal is a premium quality, high velocity, smooth-textured, water-based duct sealant. It has countless other applications in the refrigeration, heating and cooling, plumbing, and metal … -Duct-Seal 321 is UL 181 B-M Listed -Passes ASTM D-2202, ASTM C-731. Duct-Seal 321 is an all-purpose industrial-grade duct sealant for all types of metal duct, fi berglass duct board, duct fabric and fl ex duct. It includes UV inhibitors for extended outdoor exposure and built-in fiber reinforcement for added strength. Description. Another key ingredient for sealing up ductwork components includes the use of our DS-321 Indoor/Outdoor duct-sealant that works on all types of ducting including metal, glass-fiber duct board, as well as duct fabric and flexible tubing runouts. Rainbow Duct Seal Putty is used primarily by the building and specifically by the electrical trade to seal around electrical boxes, flashings, and service mast entries, etc. Duct-Seal 321 Synonyms Sealant Chemical Family Water based mastic Product Use Duct sealant Restrictions on Use For industrial use only Manufacturer Information Carlisle HVAC Products 900 Hensley Lane Wylie, TX 75098 www.carlislehvac.com Medical Emergency: CHEMTREC (USA): (800) 424 -9300 MSDS Assistance – 972 … It includes UV inhibitors for extended outdoor exposure and built-in fi ber reinforcement for added strength. It includes UV inhibitors for extended outdoor exposure and built-in fiber reinforcement for added strength. Duct-Seal 321 is a GREENGUARD Gold Certified all-purpose industrial-grade duct sealant for all types of metal duct, fiberglass duct board, duct fabric and fl ex duct. To seal metal and metal joints against air leaks in low, medium, and high pressure duct systems. DUCT-SEAL 321 is an all purpose industrial grade duct sealant for all types of metal duct, glass fiber duct board, and flex duct, as well as duct fabric and flexible tubing runouts. This non-toxic water-based product is solvent LEED compliant …