Hardcast VG-181-4 Duct Sealant

The Hardcast VG-181-4 Versa-Grip 181 is a professional-grade water-based duct sealant engineered for high-pressure HVAC systems. This fiber-reinforced duct mastic provides superior structural integrity and sealing performance on all duct types, including metal ducting, fiberglass duct board, and flexible ductwork. Designed with a heavy-bodied consistency, Versa-Grip 181 white effectively bridges gaps and joint transitions without sagging, making it an essential component for technicians aiming for Seal Class A requirements. Its advanced formulation includes integrated UV inhibitors, allowing for reliable indoor and outdoor application across various environmental conditions. Fully compliant with UL 181A-M and UL 181B-M standards, this sealant ensures residential and commercial installations pass rigorous inspections. With a service temperature range of -20?F to 200?F and a low VOC profile that meets LEED v4 requirements, it is the veteran choice for long-term air distribution system reliability.

• Universal Compatibility: Validated for use on rigid fiberglass duct board, flexible air ducts, and galvanized metal.
• Fiber-Reinforced Strength: Built-in fiber mesh increases mechanical strength at joints, reducing the need for additional reinforcement in many scenarios.
• Environmental Resilience: Features UV resistance for exterior use and mold/mildew inhibitors for high-humidity environments.
• Regulatory Compliance: Meets SMACNA pressure classes up to 10 inches w.g. and carries UL 181 listed status for safety and code compliance.
• Ease of Application: Water-thinnable and easy to apply via brush, putty knife, or caulk gun for efficient job site execution.

Is Hardcast VG-181-4 suitable for outdoor use?
Yes, the formulation contains UV inhibitors specifically designed to withstand direct exposure in outdoor ductwork installations.

How long should I wait before pressure testing the system?
While drying times vary based on humidity and temperature, it is standard practice to allow at least 48 hours for the sealant to cure before conducting high-pressure tests.

Does this sealant work on flex duct without sliding off?
Yes, the heavy-textured consistency is specifically designed to grip flexible tubing and fabric runouts, ensuring a permanent seal when applied according to UL 181B-M instructions.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.