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Old 18-01-2018, 13:30   #1
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Duct seal

Does anyone have experience using this product on a boat? I got a piece of it from someone in the yard and it seems very similar to the putty used in my hull - deck joint and binds well to butyl tape. I am considering using it as a component of my hull - deck joint repair. Thoughts?

https://www.homedepot.com/p/Gardner-...-110/100212441
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Old 18-01-2018, 17:03   #2
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Re: Duct seal

According to the manufacturer "not for use outdoors".
Duct Seal Compound - 1 lb Pugs | Gardner Bender

I would personally use 4200 or 5200.
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Old 18-01-2018, 17:44   #3
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Re: Duct seal

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Originally Posted by pmagistro View Post
Does anyone have experience using this product on a boat? I got a piece of it from someone in the yard and it seems very similar to the putty used in my hull - deck joint and binds well to butyl tape. I am considering using it as a component of my hull - deck joint repair. Thoughts?

https://www.homedepot.com/p/Gardner-...-110/100212441
We used this product on the steam ships to seal the casings and doors on the boilers. It works great for that purpose, I would not rely on it aboard my boats.
It tends to dry out and crumble.
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Old 18-01-2018, 18:43   #4
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Re: Duct seal

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Originally Posted by Orion Jim View Post
According to the manufacturer "not for use outdoors".
Duct Seal Compound - 1 lb Pugs | Gardner Bender

I would personally use 4200 or 5200.
I bought some Rectorseal 81880. Specified for outdoor use. I am not going to use 5200; I believe that a flexible compound is important in this joint. Considering Dolfinite as the alternative. Cost is different but isn't a huge issue for e here ($40/pint for Dolfinite vs. $10/lb on Rectorseal). I am mostly concerned with using the best product.
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