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Old 16-01-2014, 03:50   #1
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Crack in fixed port

When we got back down to our boat this winter ,we found that on of our fixed ports (plexiglass ) had a crack in it from the top to bottom ,a very straight and slight crack . The boat had been stored on boat stands while we were away and the side that cracked was in the direct sunlight all day. It gets pretty hot here in Curaçao. Cannot figure out why it cracked , the glass was new in 2007. We went to a plexiglass / lexan dealer to purchase a replacement glass . He told us about this product that he sold that you would inject with a syringe .Said it would be as strong as the original plexiglass once it cured and it wouldn't leak. Well to take the easy way out ,we purchased and applied it ,it only cost 18 guilders (10 US ).
Still not feeling great about heading offshore again without the new glass installed ??? Does anybody have any experience with this plexiglass glue ? Also in replacing the glass would you use plexiglass or lexan . The only lexan available on Curaçao is clear ,so we would have to purchase and install one of those tint kits that they use on car windows .

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Old 16-01-2014, 09:40   #2
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Re: Crack in fixed port

Never used or heard of that glue per say.. But for acrylic there are tons and tons of very effective adhesives, epoxies and solvents that can be used to mold, glue, and otherwise worth and shape acrylic so I would say it's probably reasonable what the guy said.

As for acrylic vs polycarbonate (lexan), I would stick with acrylic. I am slowly replacing all the windows on my boat with acrylic as they were all done in polycarbonate. My main reason is that I've seen first hand the hazing and dulling of polycarbonate under UV.. NONE of the windows on my boat are really see through anymore, they are all hazed. Polycarbonate windows are not terribly UV resistant and in 2-5 years they tend to do exactly that, haze over and become nearly unusable as windows. The only reason for using polycarbonate is for impact and shatter resistance, however there are numerous studies out there that have shown that polycarbonate actually breaks down under UV light and over time becomes weaker and less resistant to impact and breakage than acrylic. Thefore I would say, stick with acrylic windows... And for once it would appear that the best alternative on a boat is actually the cheaper alternative, polycarbonate is awfully expensive.

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Old 16-01-2014, 10:50   #3
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Re: Crack in fixed port

Cracks show up mostly by heat contraction and expansion, if your plexi is screwed to a hatch frame , holes in the plexi need to be oversized to allow for thermal expansion with the screw in place without cracking , if the plexi is glued to the frame without screws i guess the new plexi is not the right size or it fit tight in the frame? a protective UV tape is need it around the perimeter of the plexi if is glued from the bottom sides.. Cheers.
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Old 16-01-2014, 10:59   #4
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pirate Re: Crack in fixed port

Sounds like what they use for stone chips in windscreens to save on replacement..
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Old 16-01-2014, 17:04   #5
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Re: Crack in fixed port

The "glue" is actually a solvent. It will effective fix your port.
Bill Streep
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Old 16-01-2014, 20:07   #6
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Re: Crack in fixed port

We used some once, IIRC it was called Acryfix. It worked fine.


Ann & Jim, U.S. s/v Insatiable II, SE Qld, for a while
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