I replaced mine with a Lexan panel too last year.  I used black 4200 as the 
adhesive, which proved to be a bad decision on my part as it seems that 4200 
adheres poorly to lexan (let me know how it turns out for you Pete!).  This 
spring, I noticed the panel was half loose and that water was getting in at an 
alarming rate.  I removed the panel and cleaned up the 4200.

I have been recommended a silicone-based sealant specially made to bed lexan 
windows (sika 295 uv), but somehow managed to skip the parts of the 
instructions where the use of a primer was mentioned.  Last month, I noticed 
the panel is loose again with water finding its way in again.

The only upside I see to my hard-n-slow learning approach is that I'm giving 
myself so many opportunities to work on my goo-handling abilities!

Sébastien Lemieux
Merlot X - C&C 30 mk2 1987
Lake Champlain


On 2013-08-17, at 19:30 , kelly petew <kellype...@msn.com> wrote:

> I just had mine replaced mine.  The existing lens broke during the repair, so 
> Lexan was used as a replacement.  The bedding compound used on the 
> replacement lens was 4200.  
> It was expensive repair, but it seems to have solved several of my leak 
> problems.
>  
> Good Luck!
>  
> Pete W.
>  
> C&C30MKII
> Siren Song
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