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🛡️ Seal smart, save energy, and stay ahead of the curve!
The IDEAL Industries 31-601 Duct Seal Compound is a durable, flexible gray putty designed to create airtight, moisture-resistant seals around junction boxes, HVAC penetrations, and service entrances. Its permanently soft formula prevents cracking and shrinking, ensuring long-lasting protection across metal, wood, masonry, and plastic surfaces. Ready to use in a convenient 1 lb block, it’s paintable immediately after application, making it ideal for professional and DIY projects that demand reliability and a clean finish.










































| ASIN | B003MZK122 |
| Best Sellers Rank | #5,432 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #4 in HVAC Ducting |
| Brand | Ideal Industries |
| Brand Name | Ideal Industries |
| Color | Black |
| Compatible Material | Metal, Plastic, Rubber |
| Customer Reviews | 4.7 out of 5 stars 731 Reviews |
| Global Trade Identification Number | 00783250316014 |
| Included Components | Duct Seal |
| Item Dimensions | 8 x 4 x 2 inches |
| Item Form | Putty |
| Item Weight | 16 ounces |
| Item dimensions L x W x H | 8 x 4 x 2 inches |
| Manufacturer | IDEAL |
| Material | Aluminum , Rubber |
| Material Type | Aluminum, Rubber |
| Model | 31-601 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Part Number | 31-601 |
| Style | Compact |
| Style Name | Compact |
| Supported Standards | UL |
| Surface Recommendation | Metal |
| UPC | 013227238897 783250316014 |
| Unit Count | 1 Count |
| Water Resistance Level | Water Resistant |
E**S
Really great to use to seal outside ducting
Great product for outside ducting. I had a new HVAC system put in, and I had to get new refrigerant lines put in as well. Metal cover/ducting was put over the lines down the side of the house. I wanted to better seal the bottom of the ducting. This product is like a sticky and slightly tougher playdoh. You can shape it, and pull pieces apart to fit any space. I suspect that this 1 lb unit can easily cover up to 1/2 square foot of space. Some advice: 1. Remove the internal plastic cover -- it's tricky, as it rips easily. I ended up with pieces of it embedded. 2. Use a knife to cut pieces off -- you can rip them off, but it does leave a ragged "edge" that needs to be re-shapped. Overall, great product for the price!
A**R
Stops pellets dead
I use this to line my pellet traps. I only shoot .177 and .22 cal so 3/4 of an inch is enough to stop the pellets dead in their tracks. (I always use a steel plate backer just in case). I have put 10s of 1000s of pellets into my current trap with not a single pass through, I got this pack to make an indoor trap and it has worked exactly as I intended. This putty sticks amazing and never slouches or releases from my backer. If your building an airguns- pellet trap this is the stuff you want. The only maintenance I do with this is once a year I pick out as many pellets I can and then re-flatten any areas that need it. It helps if it is warmer (the putty is easier to work) and I wear nitrile gloves but that's it for maintaining.
K**P
Great item
Great item
J**.
Decent quality-lasts long
This did what I needed. It is decent quality duct seal that seems to be lasting well.
N**K
Easy to use and doesn't dry out
I like having this to seal penetrations. Very easy to use, soft and pliable and does not dry out. Works great and keeps bugs out. I will always have this stuff in my tool box.
E**E
It's a gooey duct seal block!
It's a gooey duct seal block of material. A little pricey at $11 but works great to fill intrusion holes in walls around pipes. Tears from main block easily. Can be stored in a zip lock bag. All good.
S**R
Does what it is supposed to
Helps seal around a/c pipes on the exterior walls of house. Lasts and is very easy to apply. Prevents insect/vermin intrusion and insulates.
T**F
For my purpose it's a great product
I use this in my kayak To secure my transducer for my fish finder. This Is the 2nd package I've purchased.
A**R
Five Stars
good did work for job
H**X
Impression de m’être fait pigeonner !
J’ai eu moi aussi l’impression de m’être fait arnaquer. J’ai reçu 1 seul paquet d’une livre alors qu’il est marqué 10x 1lb . Pour un seul petit paquet c’est vraiment très cher !!! Méfiez vous , ce qui est écrit ne correspond pas à ce que vous recevez. 1 paquet pour une quarantaine d’euros……c’est du vol !
L**O
Bien lire l'annonce
J'ai cru commandé un carton de 10*0.45kg et je n'ai reçu que un pain de 0.50kg pourtant il m'avait semblé que sur l'annonce il y avait inscrit 'carton 10*0.45kg' J'ai le sentiment de mettre fait rouler a140€/kg Méfiance
G**Y
7kg and post free would be a very good bargain.
I received the goods in very quick time. however the description is misleading. Its states '1 Carton Containing 10 X 2.27Kg / 5 Lb Blocks'. I only received one 5lb block and not 10. This to be fair was what I was expecting reading between the lines, as £16 for a package weighing in at 22.7kg and post free would be a very good bargain.
H**7
Four Stars
Does the job really well
Trustpilot
1 week ago
3 weeks ago