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Old 04-26-2015, 08:48 AM   #11
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3M Extreme Sealing Tape

A huge "Thanks" to all who offered advice/answers to my question about this product and where to get it. I ordered a single roll of it from Amazon.com.
Kent
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Old 04-27-2015, 10:35 AM   #12
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3M 4412N tape is also available by the roll from Grainger
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Old 04-27-2015, 10:59 AM   #13
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extreme Sealing Tape3M Extreme Sealing Tape

Thanks Poneil; that's a lower price for a smaller amount.
Kent
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Old 04-27-2015, 01:25 PM   #14
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Also try this Amazon supplier link. Currently $30.27 per 2" roll.

http://www.amazon.com/dp/B007Y7CLHM/ref=biss_dp_t_asn
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Old 04-27-2015, 02:27 PM   #15
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Once again, thanks!
Kent
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Old 05-02-2015, 10:24 AM   #16
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I inspected my 3 year old bubble window,

and, even though I do not believe it is leaking yet, I noticed 2 places where a leak could develop.

Where the long top horizontal strip overlaps onto the vertical side strip, some of the "caulking" at that lap joint has eroded away.

I happen to have some Proflex caulk, and will work that into those joints, and put a small bead around the rest. If a leak develops, I'll go to the special tape.

Thanks for bringing this issue to light.
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Old 05-02-2015, 02:49 PM   #17
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3M Extreme Sealing Tape

Mickrock, you're welcome, although I don't deserve the credit for bringing the issue to light. There are a ton of posts in the forum that predate me by years. But what helps one person also helps another!

Kent
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Old 05-02-2015, 09:55 PM   #18
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The overlap in the corner joint is the

problem, and I can offer a solution for it.

The horizontal strip of tape is raised over the vertical side strip at the corner, and that raising, especially if done under tension, results in an angled gap that the tape caulk needs to fill. The rain water pressure eventually erodes the weakened caulk at that overlap, causing a leak.

My recommendation is to use a "butt joint" instead of the "overlapping joint". The horizontal strips should cover the top and bottom sides entirely, with the 2 vertical side strips butted against them at the corners.

The only disadvantage is that the butt joints will take more craftsmanship and detail work to complete. Maybe a couple more minutes of time would be needed. This should not be a problem for experienced trades people.
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