Resealing and rebedding cabin windows/ports with Butyl tape - Page 2 - SailNet Community

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  #11  
Old 07-31-2012
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Re: Resealing and rebedding cabin windows/ports with Butyl tape

Understood Chris, I use butyl for all my deck hardware but making a water tight seal on glass is extremely difficult, especially since the different materials expand and contract at different rates. I'm just saying that between the frame and the glazing there isn't generally a great deal of compressive force and I'm not sure using butyl is the best material for this application. I may be wrong, maybe Mainesail, who got us all started using butyl, will chime in here with his experience. Re-sealing ports is a time consuming job, not something you want to have to do more than once.
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Old 07-31-2012
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Re: Resealing and rebedding cabin windows/ports with Butyl tape

Good point, mine were all through bolted and I could adjust/apply pressure fairly precisely - not all (not most prolly) ports are like that. Still though, it'd be a tough call as even when butyl does develop a leak, it's so much easier to repair. Any curing goops would necessitate a total removal of all the old material, new surface prep and a full re install whereas butyl can be fudged with with a heat gun and some manipulation right in the trouble spot.

I don't know what would actually be best for a light pressure application like some ports would apparently be. Tough call I guess.

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Old 07-31-2012
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Re: Resealing and rebedding cabin windows/ports with Butyl tape

Quote:
Originally Posted by jrd22 View Post
Understood Chris, I use butyl for all my deck hardware but making a water tight seal on glass is extremely difficult, especially since the different materials expand and contract at different rates. I'm just saying that between the frame and the glazing there isn't generally a great deal of compressive force and I'm not sure using butyl is the best material for this application. I may be wrong, maybe Mainesail, who got us all started using butyl, will chime in here with his experience. Re-sealing ports is a time consuming job, not something you want to have to do more than once.
Butyl is used by many auto manufacturers to seal windshields. It is laid down, the windshield is placed on top then a secondary seal typically made of rubber and metal is fastened into place using mechanical fasteners or adhesives.

Butyl seals glass with no issues as long as there is pressure applied which is why I used it. When I originally looked into using it I contacted a glass shop who told me that they use it to bed glass into aluminum window frames. my frames are aluminum. Trust me when it was not easy to squeeze those 2 pieces of frame together and the pressure is held by the four screws holding the frame together.

Hopefully this addresses your concern.
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Old 07-31-2012
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Re: Resealing and rebedding cabin windows/ports with Butyl tape

Quote:
Originally Posted by jrd22 View Post
Understood Chris, I use butyl for all my deck hardware but making a water tight seal on glass is extremely difficult, especially since the different materials expand and contract at different rates. I'm just saying that between the frame and the glazing there isn't generally a great deal of compressive force and I'm not sure using butyl is the best material for this application. I may be wrong, maybe Mainesail, who got us all started using butyl, will chime in here with his experience. Re-sealing ports is a time consuming job, not something you want to have to do more than once.
Only in recent years has the auto industry moved away from installing windshields with butyl ribbon tape. It worked for 50+ years on car glass bumping up and down the roads of the world....
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Old 08-01-2012
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Re: Resealing and rebedding cabin windows/ports with Butyl tape

Butyl it is from now on for all ports and windows!
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