I am replacing my windows on Pegasus using 3/8 plexiglass, VHB (4991) tape,
Dow 795 sealant. I have done the Sikaflex route didn't work. Lasted 4 years. A
friend used the tape method 20 years ago still no leaks.
Doug MountjoysvPegasusLF38 just west of Ballard, WA.
------ Original message------From: Frederick G Street via CnC-List Date: Wed,
Oct 21, 2015 11:04To: cnc-list@cnc-list.com;Cc: Frederick G Street;Subject:Re:
Stus-List Replacing Windows
Gary — I’m going to be replacing the fixed windows on my LF38 over the winter.
I’ve done the Plexus thing twice now (previous boat); this time, I’m going to
try the VHB tape with Dow 795 approach, like Paul did on Johanna Rose:
http://svjohannarose.blogspot.com/search/label/NewPorts.
I’ll be using 3/8” bronze acrylic with a chamfer to the outside edge.
— Fred
Fred Street -- Minneapolis
S/V Oceanis (1979 C&C Landfall 38) -- on the hard in Bayfield, WI :^(
On Oct 21, 2015, at 12:45 PM, Gary Russell via CnC-List <cnc-list@cnc-list.com>
wrote:
Hi Paul, I agree that 1/4" is too thin. The other 37+ at my club has 5/16"
It amazes me that people with no marine design experience would change the
design. I plan to go with 3/8" acrylic. But then again...
The problem with Lexan (which is a polycarbonate) is that it is less
scratch resistant than Plexiglas (acrylic). You are probably trading one
problem for another.
As for Plexus vs Silka 295, I am really torn. The write-up in the Photo
Album suggest that Plexus will be flexible enough if (big if) the bond
thickness is large enough. To that end he added glass beads to the adhesive to
make sure the bond thickness didn't get thinner than 0.030".
Thoughts, anyone?
GaryS/V High Maintenance'90 C&C 37 PlusEast Greenwich, RI, USA
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