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💧 Seal the deal with the pro-grade water-based duct sealant everyone’s talking about!
DUCT-SEAL 321 is a 1-gallon, water-based duct sealant weighing 10.75 lbs, designed for industrial HVAC applications. Manufactured by Hardcast, it offers durable, water-resistant sealing on multiple surfaces including metal and flexible ducts. A trusted choice since 2017, it combines professional-grade adhesion with eco-conscious formulation for reliable, long-lasting performance.
| ASIN | B071ZQXDQZ |
| Best Sellers Rank | #268,644 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1,254 in Duct Tape |
| Brand | Hardcast |
| Date First Available | June 1, 2017 |
| Is Discontinued By Manufacturer | No |
| Item Form | Liquid |
| Item Weight | 10.75 pounds |
| Number of Items | 1 |
| Package Dimensions | 7.87 x 7.6 x 7.6 inches |
| Style | Industrial |
| Surface Recommendation | Metal, Glass Fiber, Flex Duct, Duct Fabric, Flexible Tubing |
| UPC | 638532800500 |
| Unit Count | 1.00 Count |
| Water Resistance Level | Water Resistant |
G**T
Good product
Covers and sticks well
R**.
Durability
I have used this product for many years in the hvac industry.. I have no complaints..
K**E
The best
Totally satisfied, great product
C**Y
Is the real deal
Works amazing!
Trustpilot
2 days ago
2 months ago