Duct Seal 321 Duct Sealant

The Hardcast Duct Seal 321 Duct Sealant is an all-purpose, industrial-grade sealant designed for various duct systems, including metal ducts, glass fiber duct boards, and flexible ducts. 

Key Features:

• Versatile Application: Suitable for both indoor and outdoor use across multiple duct types.

• Enhanced Durability: Formulated with UV inhibitors and built-in fiber reinforcement to withstand environmental factors.

• Safety and Compliance: Non-toxic, solvent-free, water-based composition with UL 181B approval.

Specifications:

• Color: Gray

• Size: One gallon

• Application: Indoor/outdoor water-based duct sealant

• Approval/Listed: UL 181B

• Lot Quantity: 4

• Shipping Dimensions:

  • Width: 6.90 inches

  • Length: 6.90 inches

  • Height: 7.30 inches

  • Weight: 11.55 lbs

Compliance and Safety Notes:

This product carries a warning for cancer and reproductive harm. For more information, visit www.P65warnings.ca.gov.