And I, on the other hand, was referring to the clear silicon sealant (that
said 'Marine' on the label). Apparently there is a difference in products.

Brian


"Jerry W" wrote in message
...
As a point of clarification...there is a difference between clear silicone
sealant and silicon rubber. The product I referred to is marketed by
Boatlife and is called "Marine Silicone Rubber". It has worked well for me
sealing Plexiglas ports to fiberglass. FWIW!

"Brian D" wrote in message
news:qSojb.142781$%h1.143951@sccrnsc02...
Wow! I didn't know you shouldn't use polysulfides with plastics. Given
that little tidbit, I think I'd try their 4000UV product (after finding
out
what it is.) I've had trouble with silicon leaking, including marine
varieties, and don't buy it for anything anymore...just walk right past
it
and buy something else.

Brian


"Jerry W" wrote in message
...
I've had very good results with silicone rubber sealant. I note that
West
Marine's catalog guide section specifically recommends against using
polysulfides on plastic and this confirms my experience. The sealant
never
really cures at the interface with the plastic. Their catalog features
a
3M
product designated 4000UV which is "highly recommended for ABS, Lexan
and
other plastics". I have no experience with this material and would be
interested in hearing from anyone who has.
"Bryan B" wrote in message
...
Any suggestions for bedding plexiglass window to fiberglass deck
opening.
Polysulfide, Silicone, or another material?Which brand?

Thanks,

Bryan