Mark, When I did my windows I didn't use a primer, just stuck the tape
(VHB4991) straight on the rough epoxy. You might try roughing up thr primer and
wipe with copious amounts of acetone. One thing I learned is put the windows in
when they are cool. The plexiglass expands in sunlight by quite a bit. When it
cools over time it will pull loose from the 795 causing leaks. Also bevel the
edge towards the hull, and slightly round the outer edge. I also rough up the
contact area of the plexi.Good luck
Doug Mountjoy Rebecca Leah LF39 Port Orchard YC, WA.
-------- Original message --------From: Mark Baldridge via CnC-List
<cnc-list@cnc-list.com> Date: 7/6/18 13:38 (GMT-08:00) To:
cnc-list@cnc-list.com Cc: Mark Baldridge <jmbaldri...@gmail.com> Subject:
Stus-List VHB tape adhesion
Hi All,
I'm having the fixed windows replaced on my C&C 37/40+. I had
fiberglass work done to clean up the window opening on the deck
before putting the new windows on.
I bought the windows from South Shore and am having them installed
with 3M VHB tape, then Dow 795 caulking.
The VHS tape adheres great to the windows, but not so well to the
deck. There is 2 part epoxy primer on the window openings and it has
been properly cleaned. A test area has been sanded and the tape
doesn't appear to stick there much better. There is plenty of heat
here in the North Carolina, so that is not the problem.
Has anyone else had this issue of the tape not sticking well to the
deck and possibly have suggestions that I can pass to the yard?
Thanks,
Mark Baldridge
~~~~~~~~~~~~~~~~~~~~~~_/)
'89 C&C 37/40+ "The Edge"
Surf City, NC
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