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🛡️ Seal smarter, not harder — the duct seal that works as hard as you do!
RectorSeal 81880 is a gray, soft silicone putty duct seal compound designed for professional-grade sealing in HVAC, plumbing, and electrical applications. It forms a durable, reusable, airtight, and watertight seal resistant to water, alcohol, and mild acids, while being non-toxic and safe on skin and materials. Easy to hand-mold and paintable immediately after application, it’s the go-to solution for tradesmen seeking reliable, versatile sealing performance.









| ASIN | B008A3UG94 |
| Best Sellers Rank | #46,530 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #250 in Hardware Sealers |
| Brand | Rectorseal |
| Brand Name | Rectorseal |
| Color | Gray |
| Compatible Material | Metal |
| Customer Reviews | 4.7 out of 5 stars 1,540 Reviews |
| Global Trade Identification Number | 00021449818803 |
| Included Components | Duct Seal Compound |
| Item Dimensions | 16.5 x 7.6 x 7.6 centimeters |
| Item Form | Putty |
| Item Type Name | Duct Seal Compound |
| Item Weight | 0.45 Kilograms |
| Item dimensions L x W x H | 16.5 x 7.6 x 7.6 centimeters |
| Item weight | 0.45 Kilograms |
| Manufacturer | The Rectorseal Corporation |
| Material | Silicone |
| Material Type | Silicone |
| Model | 81880 |
| Number of Items | 1 |
| Part Number | 81880 |
| Style | Industrial |
| Style Name | Industrial |
| Surface Recommendation | Various surfaces |
| UPC | 021449818803 |
| Unit Count | 16 Grams |
| Water Resistance Level | Water Resistant |
| Water resistance level | Water Resistant |
R**R
great putty
was easy to use for putting around pipes coming out of fridges
Z**T
Much better than spray foam for small gaps!
"I used this to seal around the electrical conduit where it enters my house, and it was so easy to work with. It’s like a soft modeling clay that stays pliable, so you can really pack it into gaps to stop drafts and bugs. Unlike spray foam, it’s not messy and you can actually remove or adjust it later if you need to. Great price for a very effective product!"
D**N
Absolutely as described
This is a unique product. It works well to seal up holes in electrical boxes with wire passing through. Easy to knead and shape. Not sticky to the hands but stays in place very well. Too soon to tell but seems like it will stay pliable and not harden. Bottom line a great product for sealing up those holes in the wall through out the house where plumbing or wire passes through.
M**E
Good
Good
G**E
Super fácil de colocar
Tuve que pasar unos cables entre el techo de la cocina y el piso de la sala de arriba, mi temor era que los aromas de la cocina se filtraran, pero no quería usar algo que dejara fijados permanente los cables para cuando necesiten ser cambiados en el futuro. No se filtran los aromas, ni se desprende la masilla, estoy tranquila.
Trustpilot
3 weeks ago
2 weeks ago