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Go Back   SailNet Community > On Board > Gear & Maintenance
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  #11  
Old 05-10-2009
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Quote:
Originally Posted by Pub911 View Post
as long as we're into it...where does 4000 fit in to the product line?
It's neither a polyurethane nor a polysulfide but rather a polyether. It's supposedly more UV resistant but in my own experience it does yellow.

It has a similar general rated bond strength to 4200 at 300 PSI.. However it bonds to gelcoat at about 424 PSI. At 500 hours it has an elongation before break of 804% but at 1000 hours it drops back to 723 which tends to mirror polyurethane products losing flexibility over time..

It would not be my first choice for below water use..
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Last edited by Maine Sail; 05-10-2009 at 07:33 AM.
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  #12  
Old 05-10-2009
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Probably, but if you go with 4200, you can wait until it is mostly or fully cured..
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Originally Posted by T37Chef View Post
Can the boat be splashed before the 2-3 week cure time?
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Old 05-10-2009
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Quote:
Originally Posted by Maine Sail View Post
It's neither a polyurethane nor a polysulfide but rather a polyether. It's supposedly more UV resistant but in my own experience it does yellow.
It says on the packing that it is safe for "most plastics." I suppose the only way to know for a particular plastic is to try it?

Also, when it bonds to gel coat at 500 psi, does this mean its stronger than the gel and should be considered permanent?
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