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🔧 Seal smarter, not harder — the duct seal that works as hard as you do!
RectorSeal 81880 is a 1-pound, gray, non-toxic duct seal putty designed for professional HVAC, plumbing, and electrical applications. It forms a flexible, reusable, air- and water-tight seal that resists water, alcohol, and mild acids/bases without corroding metal or irritating skin. Easy to apply by hand between 25°F and 120°F, this asbestos-free compound is trusted by industry pros and DIYers alike for reliable, versatile sealing on various clean, dry surfaces.









| ASIN | B008A3UG94 |
| Brand Name | Rectorseal |
| Color | gray |
| Compatible Material | Metal |
| Customer Reviews | 4.7 4.7 out of 5 stars (1,453) |
| Global Trade Identification Number | 00021449818803 |
| Item Dimensions | 16.5 x 7.6 x 7.6 cm |
| Item Form | Liquid |
| Manufacturer | The Rectorseal Corporation |
| Material Type | putty |
| Model | 81880 |
| Number of Items | 1 |
| Part Number | 81880 |
| Style Name | 1 lb |
| Surface Recommendation | Various Surfaces |
| UPC | 021449818803 |
| Unit Count | 1.0 Count |
| Water Resistance Level | Water Resistant |
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