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The IDEAL 31-601 Duct Seal Compound is a 1 lb gray putty designed for sealing junction boxes, service entrances, and HVAC penetrations. It creates a durable, flexible barrier that resists air, moisture, and dust intrusion while remaining permanently soft and easy to mold. Safe for use on multiple surfaces including metal, wood, and plastic, it is weatherproof, non-corrosive, and paintable immediately after application—perfect for professional-grade sealing that boosts energy efficiency and protects installations indoors and out.










































| ASIN | B003MZK122 |
| Best Sellers Rank | #5,568 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #4 in HVAC Ducting |
| Brand Name | Ideal Industries |
| Color | Black |
| Compatible Material | Metal, Plastic, Rubber |
| Customer Reviews | 4.7 4.7 out of 5 stars (731) |
| Global Trade Identification Number | 00783250316014 |
| Included Components | Duct Seal |
| Item Dimensions | 8 x 4 x 2 inches |
| Item Form | Putty |
| Item Weight | 16 ounces |
| Manufacturer | IDEAL |
| Material Type | Aluminum, Rubber |
| Model | 31-601 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Part Number | 31-601 |
| Style Name | Compact |
| Supported Standards | UL |
| Surface Recommendation | Metal |
| UPC | 013227238897 783250316014 |
| Unit Count | 1 Count |
| Water Resistance Level | Water Resistant |
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