Red Devil 0846DW F-Seal 181 Fiber Reinforced Water Based Duct Sealant, 10.1 oz, White, 24 Pack

Update: The Venus have held up well and still almost two years later look so much sturdier and new!!I used this to seal my mobile home vents after applying duct vent tape to seal them up. For my personal project, I wish I would have gotten the bucket instead of the caulking dispenser tube as I needed more and it would have been easier to work with. This tube lasted for eight vents but I may slather more on when I get another tube for my last three vents since I’ll have extra to get rid of.The color is a dull gray and when I got it on my hands a few times, I definitely had to scrub under water with soap to get it off. It scraped off the floor and other surfaces easily like a rubber glue which was nice. I will try and update after we turn the heat on this winter to tell how it’s holding up.

This applies like any other caulk you're familiar with. It holds well and sets very well.

Made my duct job very easy to finish. Even overhead the thickness worked quite well. So far no cracks or failures after a week.

This was so worth getting, had a little job and didn’t need a whole bucket. Follow instructions and it does the job.

Seals well, easy to use, 5 stars from me

Works as described , seals all areas of furnaces ducts I would recommend, only issue it is pricey but it-seals all areas properly