Hi Bruce,
Welcome to the C&C forum. Some members get a little cranky, but most
are wonderful folks that just want to help.
First a few basics. Plexiglas is a trade name for acrylic and Lexan
is the trade name for poly carbonate. Poly carbonate is known for being
bullet proof, but easy to scratch. Acrylics are more scratch resistant,
but not as tough. If you are in trouble with the mob, then by all means
use poly carbonate otherwise acrylic is probably a better choice. I don't
know how to tell the difference between the two.once installed.
Don't quote me on this, but I think VHB (Very High Bond) can be
separated with a razor blade driven between the surfaces. After that
delicate scraping is probably involved. Anything is better than Plexus.
It is almost impossible to remove. You can grind it out, but if it is in a
recess, then you have to worry about damaging the surrounding area.
Best of luck,
Gary
S/V High Maintenance
1990 C&C 37 Plus
East Greenwich, RI, USA
~~~~~~~_/)~~~~~~
On Mon, Nov 9, 2015 at 4:23 PM, Bruce Pope via CnC-List <
cnc-list@cnc-list.com> wrote:
> This is my first post so please be kind if I am doing anything wrong.
>
> I have an '86 29 MKII purchased in august with leaking windows. There
> is obvious signs of repair to the gel coat around the windows so I
> am certain they have been replaced before. Windows are in good shape so I
> just need to re-bed.
>
> How can I tell the difference between polycarbonate and acrylic? I have
> started to remove one of the windows by digging out the old sealant and
> carefully pulling it away and it bends a bit. Can I assume therefore it is
> polycarbonate?
>
> Any concerns about getting the window off later to reseal if using 3M VHB
> tape. 3M says this tape forms a 'permanent bond'.
>
> Derek McLeod on a C&C 29-2 used DOW 795. How did you hold the window in
> place while the 795 cured?
>
> Thanks.
>
>
> Bruce
>
> s/v 'Gyrfalcon'
>
> '86 C&C 29 MK II
>
> Kootenay Lake, BC
>
>
>
>
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