This high-performance, water-based duct sealant is designed for reliable indoor and outdoor use, providing a strong, flexible seal across a wide range of HVAC applications. Ideal for professionals, it delivers long-lasting adhesion and durability on metal ductwork, fiberglass duct board, and flexible duct systems.

Key Features & Benefits:

• Versatile Application: Compatible with metal ducts, glass fiber duct board, flex duct, duct fabric, and flexible tubing runouts
• Durable Performance: Withstands temperatures from -20°F to 200°F for year-round reliability
• Strong Coverage: Covers approximately 214–320 linear feet per gallon (at 20–30 mil thickness, 3" width)
• Flexible & Long-Lasting: Mastic formulation with >20 Shore A hardness for a secure, lasting seal
• Low VOC Formula: 45 g/L for reduced environmental impact
• Indoor/Outdoor Use: Performs in a variety of job site conditions

Product Specifications:

• Size: 1 Gallon
• Container Type: Pail
• Color: White
• Form: Mastic
• Composition: Ethylene Glycol, Methanol
• Odor: Typical latex with slight ammonia scent
• Specific Gravity: 1.39
• pH: 8–9
• Vapor Pressure: 17 mm Hg at 20°C
• Boiling Point: 212°F
• Shelf Life: 1 year (unopened)