HomeParts & AccessoriesHardcast Flex Grip 550 Water-Based High-Velocity Duct Sealant 1 Gallon Hardcast Flex Grip 550 Water-Based High-Velocity Duct Sealant 1 Gallon$95.00 Hardcast Flex Grip 550 Water-Based High-Velocity Duct Sealant 1 Gallon quantity Buy now SKU: HFG550 Category: Parts & Accessories Product ID: 1833 Related products $119.00 Trade Pro #3 Mineral Compressor Oil 1 Gallon ISO Grade 32 $5.95 Miami Tech Nested Tab Collar 4” $109.00 Nu-Calgon Evaporators Pow’r-C Evaporator Coil Cleaner 1 Gallon 3.8 Liters