Carlisle Hardcast CCW181-G Duct Sealant 1 Gallon

Product Description

The CARLISLE HARDCAST CCW181-G is a water-based duct sealant formulated for both indoor and outdoor HVAC duct applications. It seals leaks on metal duct, fiberglass duct board, flex duct, duct fabric, and flexible tubing runouts. A built-in polyester reinforcement adds structural strength to the cured seal, while UV inhibitors protect the material from sun exposure in outdoor installations. HVAC technicians and sheet metal contractors apply this sealant during new construction and retrofit work to reduce air leakage and improve system efficiency.

This sealant is suited for light commercial and residential HVAC installations where a single product must perform across multiple duct substrate types. Its water-based formula makes it compatible with occupied-space work and low-VOC job site requirements. The 1-gallon container is sized for production duct work on multi-zone residential systems or small commercial projects where both indoor trunk lines and exterior duct runs need sealing in the same application.

Key Features

• Built-in polyester reinforcement for added seal strength across joints and seams
• UV inhibitors rated for outdoor exposure without separate topcoat
• Bonds to metal duct, fiberglass duct board, flex duct, duct fabric, and flexible tubing runouts
• Water-based formula supports low-VOC and indoor air quality requirements
• 1-gallon size suitable for production residential and light commercial duct sealing

Compatibility

Designed for use on all types of metal duct, glass fiber duct board, flex duct, duct fabric, and flexible tubing runouts in both indoor and outdoor HVAC duct systems.

Installation Notes

Licensed HVAC technicians and sheet metal contractors typically apply this sealant with a brush or trowel to clean, dry duct surfaces. Turn off the air handling system before sealing to allow the product to cure without airflow across wet sealant. Follow local mechanical codes, including SMACNA and IMC guidelines, for required sealant class and joint preparation. Do not apply to surfaces with standing moisture or in ambient temperatures outside the product manufacturer's recommended cure range.

Technical Specifications

• Coverage: 1 gallon
• Length: 7.75 inches
• Width: 7.75 inches
• Height: 7.5 inches
• Weight: 11.75 pounds

Standard Information

• Brand: CARLISLE HARDCAST
• Manufacturer Part Number: CCW181-G