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RectorSeal Duct Seal Compound is a gray, soft, non-toxic, putty-type compound that adheres to most clean dry surfaces. The putty like duct sealant compound is easy to use and can be hand applied from 25°F to 120°F. Duct Seal creates an air and water tight seal. Resistant to water, alcohol, and mild acids and bases. Duct Seal Compound is asbestos-free. It will not damage plastic materials, corrode metals, or have adverse effect on human skin. Duct Seal compound; grey in color and putty like; non-corrosive and non-irritant. Can be hand-shaped to any form and reused if necessary, has many applications in HVAC/R, plumbing, metal fabrication, and a superb general purpose sealant around the home. May be painted immediately after applying and won't bleed through dry paint film. FOR THE TRADESMAN: RectorSeal is recognized as a leading provider of quality solutions for the professional trades serving heating, ventilation, and air conditioning (HVAC/R), plumbing, electrical, and construction markets.
From the Manufacturer
RectorSeal Duct Seal Compound is a gray, permanently soft, non-toxic, putty type compound which adheres to most clean, dry surfaces. It is designed to be used when sealing around the ends of electrical conduit and boxes. 10-Pound.
TBW_Boston
Reviewed in the United States on February 4, 2025
I used this to plug a couple holes where incoming wires for a new 200amp panel. One hole was small the other was large. The larger hole required using "Great Stuff" Fireblock gap filler mostly, and then at the surface edge of the wall I used this putty.The smaller hole I only used the putty and it filled it very easily and nicely. Plus the putty, remains pliable and soft even days after application.
Lisa
Reviewed in the United States on February 22, 2025
I had no idea if the stuff would work, but it works incredibly well to help provide additional sealant around a kitchen sink drain as I reconnected the pipes. I use this in addition to a new gasket to provide additional safety from leakage and it felt great. It’s going to be useful in a variety of different household things now.
Robert Fraser
Reviewed in Australia on January 21, 2025
was easy to use for putting around pipes coming out of fridges
Carlton P.
Reviewed in the United States on January 18, 2025
We have newly built house and they did not caulk or seal.any of our pipes and hoses coming into the house from the outdoor Central air unit. So in came the mice. Good thing I recall my father ( who was an electrician by trade ) use to use this plyable clay like.product around incoming wire and plumbing applications. This is a wonderful product and should be in every homeowners tool bag and workbench area ready to seal.out drafts and varmints!Great value for your bucks!
Brett Osthimer
Reviewed in the United States on September 21, 2024
I saw someone mention this product for HVAC and after reading the reading the review this product does the job. I posted a before and after picture.
eastmared
Reviewed in the United States on August 17, 2024
I had to replace the aging insulation on the copper coolant lines from my 20 year old central air units sitting on the side of the house. I used Rectorseal to fill the holes where the lines entered the house through the exterior wall. Rectorseal was the only joint compound I could find that was rated for outdoor use. It was easy to work with, provided an effective seal against insects and the elements, and looks like a professional installation. I couldn’t find anything that stated it was uv resistant; but that was not really an issue for me as the units are on the north side of the house. I highly recommend it.
ME
Reviewed in Saudi Arabia on July 5, 2024
Good
Barry P. Press
Reviewed in the United States on December 31, 2024
To prevent water from seeping in along the conduit leading into our house (connecting to our circuit breaker panel), an electrician recently used Rectorseal along the outside of our home. We had a similar issue with our AC line, so I tried using Rectorseal myself. This product is amazing! Super easy to apply and works great, at a very low cost. Rectorseal is sort of like an industrial-strength "Play-Doh". As a duct seal putty, this is a perfect fixer to prevent water (and dirt) from leaking into our basement. Highly recommended!
metalpurist
Reviewed in Canada on December 14, 2024
Wore gloves. Tore off a chunk, rolled it up like play-doh and did rings around plumbing and gas penetrations in the basement coming through the concrete walls, push it to the concrete with a smearing motion and it bonded well, will do the same on exterior when weather warms up, area feels warmer like I may have stopped a breeze down there.
Jonathan
Reviewed in the United States on October 31, 2024
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Christopher Bernard
Reviewed in Canada on October 3, 2024
Stuff is awesome purchased 1 pound and we'll came back for more and found this 5 pound brick totally worth it price is more then fair
Waleed al saeed
Reviewed in Saudi Arabia on October 26, 2024
تم تجربته على فتحات في جدران الاسمنتيه يقوم باغلاق الفتحه بشكل ممتاز يعمل كانه صلصال وليس ايضا يعمل ايه اضرار ويتحمل الاجواء الخارجيه وبامكانك ازالته في اي وقت
statsanalyst
Reviewed in the United States on December 10, 2023
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."
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