1 Gallon Water-Based Duct Sealant

DiversiTech 800-009 CADS Fiber-Reinforced Water-Based Duct Sealant – 1 Gallon, Gray

The DiversiTech 800-009 CADS Duct Sealant is a professional-grade, fiber-reinforced polymer adhesive formulated for high-performance pressure sealing in HVAC duct systems. Engineered for use on metal, fiberglass ductboard, and flexible duct materials, this sealant provides durable, airtight joints that maintain system efficiency and integrity under varying environmental and pressure conditions. The water-based composition allows for easy application and cleanup while delivering long-lasting adhesion and flexibility once cured. CADS sealant is suitable for both new installations and maintenance of existing ductwork where a robust and compliant air seal is required.

Technical Specifications

• Manufacturer: DiversiTech
• Brand: Polymer Adhesives (CADS Series)
• Model Number: 800-009 (AS22)
• Product Type: Fiber-Reinforced Water-Based Duct Sealant
• Container Type: Pail
• Container Size: 1 Gallon
• Net Weight: 10.8 lb/gal
• Base Type: Water-Based Polymer
• Composition: Chlorinated Paraffin, Methanol, Ammonium Hydroxide, Titanium Dioxide
• Appearance: Gray Paste
• Odor: Slight Ammoniacal
• Coverage: 70 to 80 sq. ft. per gallon (depending on application thickness)
• Drying Time: 12 to 24 hours (ambient conditions dependent)
• Operating Temperature Range: -40°F to 200°F (-40°C to 93°C)
• pH Range: 8.0 to 9.5
• Viscosity: Paste consistency for brush or trowel application
• Reinforcement: Fiber-reinforced for added tensile strength and crack resistance
• Adhesion Compatibility: Suitable for metal duct, fiberglass ductboard, and flex duct surfaces
• Application Method: Applied via brush, trowel, or mechanical applicator
• Cleanup: Water cleanup before curing
• Resistance: UV and moisture resistant after full cure
• Compliance: Meets professional HVAC sealing standards for air duct pressure retention

Performance and Application

The DiversiTech CADS 800-009 Duct Sealant is formulated to create a flexible, airtight barrier in HVAC duct systems exposed to variable temperature, pressure, and vibration. The fiber-reinforced formulation increases tensile strength and prevents cracking or separation under mechanical stress, making it ideal for both field and shop applications. When applied to clean surfaces, the sealant provides strong adhesion to galvanized steel, aluminum, and fiberglass substrates, ensuring long-term joint integrity. Its water-based formula simplifies handling, reduces VOC emissions, and allows for fast application and cleanup. Once cured, the sealant forms a durable, non-flammable bond that withstands operating temperatures up to 200°F, ensuring continued duct system performance and leak prevention in commercial and industrial installations.

Summary

The DiversiTech 800-009 CADS 1-Gallon Fiber-Reinforced Water-Based Duct Sealant provides professional contractors with a durable, high-performance solution for sealing HVAC duct systems. Its polymer-based formulation, reinforced with fibers for added strength, delivers reliable adhesion, flexibility, and environmental resistance across a wide range of duct materials and operating conditions.