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Old 10-13-2021, 01:38 AM   #1
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Join Date: Oct 2021
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PNW rain is affecting my adhesive setting

Iím trying to put a vent fan and a roof hatch/skylight in my bus. So I will have to cut 2 holes in the roof (mine is a metal shuttle bus and did not previously have holes in the roof).

Iím doing this build in the PNW and it rains a lot here. Especially this time of year. So I need to make sure my adhesive itís is able to set at cool temperatures and wonít be effected by moisture.

I already tried silicone while patching the holes in my floor and found out the hard way that it didnít work. Iíve heard a lot about polyurethane sealant but I want to know if it will set.

Iím definitely going to put butyl tape on all the edges but I want an extra layer or protection if possible.

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Old 10-13-2021, 09:39 AM   #2
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Join Date: Dec 2017
Location: Dawsonville, Ga.
Posts: 10,301
Year: 1999
Coachwork: Genesis
Chassis: International
Engine: DT466/3060
Rated Cap: 77
I used 1" Butyl tape, then a sealant just around the edge. Didn't need much, as the butly really did the job.
I Thank God That He Gifted Me with Common Sense
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polyurethane sealant, roof hatch, sealant, temperature

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