🛡️ Seal smarter, not harder — the pro’s choice for airtight perfection!
RectorSeal 81880 is a 1-pound gray duct seal compound designed for professional tradesmen. This soft, non-toxic putty adheres to most clean, dry surfaces and can be hand-molded for reusable, airtight, and watertight seals. Resistant to water, alcohol, and mild acids, it’s safe on plastics and metals, paintable immediately, and perfect for HVAC, plumbing, electrical, and general sealing applications.
| Material | Putty |
| Brand | Rectorseal |
| Style | 1 lb |
| Item dimensions L x W x H | 6.5 x 3 x 3 inches |
| Water Resistance Level | Water Resistant |
| Item Form | Putty |
| UPC | 021449818803 |
| Unit Count | 16.0 Ounce |
| Global Trade Identification Number | 00021449818803 |
| Number of Items | 1 |
| Color | Gray |
| Surface Recommendation | Adheres to most clean dry surfaces |
| Manufacturer | The Rectorseal Corporation |
| Part Number | 81880 |
| Item Weight | 15.8 ounces |
| Product Dimensions | 6.5 x 3 x 3 inches |
| Item model number | 81880 |
| Size | 1 Pound (Pack of 1) |
| Item Package Quantity | 1 |
| Number Of Pieces | 1 |
| Special Features | Non-toxic |
| Included Components | Duct Seal Compound |
| Batteries Included? | No |
| Batteries Required? | No |
F**K
Very easy to manipulate. Sticks well to metals.
Works really well. Doesn't stick as good against vinyl siding or brick, but does so on metals like HVAC. Easy to work the clay like material and shape to fill gaps in your furnace. My unit leaks air around every seem, so feel like the basement gets too much air. I sealed it up better so now the cold air goes upstairs.
W**R
Perfect for Sealing Electrical Wires
This is great stuff! I needed to seal the end of a conduit where wires were coming out. Worked fine. Easy to use.
B**R
Looks like a very easy product to use.
I have not used it yet, but it looks like it will work perfectly for sealing purposes. The price was fair enough and that was another reason that I am trying it.
A**R
Works as advertised
Seems to work well. Very sticky to handle.
S**T
Exceptional Value!
After recently residing my house, I needed a block of this material to seal the gas line's service entrance. Although the gap was small enough to seal with a bead of caulk, this stuff is easier and less messy to apply with the same result.Product Quality: It's tough to determine this type of material's quality visually although I've used this material and brand before and it's an excellent, moldable, non-hardening sealant.Product Use: Fresh from the delivery truck in 30 degree weather, the block was stiff, but still moldable. It became increasingly malleable with the rise in indoors temperature, reaching clay-like moldability.Although this material is sticky, it leaves no sticky residue on either hands or applied surfaces.Final Thoughts: If you need to seal the wire or pipe poking through your wall to the great outdoors, this is the stuff to use. It's less messy than caulk, arguably longer lasting, and there's considerably less waste material. Since it's non-hardening, it should last if stored properly.And it's a third of the cost on Amazon as at the big box store! I bought second block "just in case."
T**.
Going to buy more
Product worked great for sealing entry point of electrical service to my shed. Stayed very pliable and easy to work with. Will actually buy quite a bit more for sealing open area areas of another shed.
T**S
Good
Seems good. We’ll see how it holds up up
S**N
Great for price.
Needed to replace aged duct seal on ac line into house. Easy to use and did the job. Held up after installation.
Trustpilot
2 months ago
1 week ago
