26 Jul 1 Gallon Gray Fiber Reinforced HVAC Duct Sealant UL 181 A M B M Certified
1 Gallon Gray Fiber Reinforced HVAC Duct Sealant UL 181 A M B M Certified Description: Red Devil F-Seal 181 is a specially formulated fiber reinforced water based duct sealant/mastic for indoor/outdoor use. Suitable for pressure sealing all types of HVAC duct systems including metal,...