Ultrasonic leak finder - anyone?


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Hanaldo
Hanaldo
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There's so many, I've barely scratched the surface. But, I wouldn't use Airtech AT200Y or GS-333T again. Just awful. 

My absolute favourite is Cytec (now Solvay) LTS90B. The stuff Easy Composites sell isn't bad either, but not quite as good as the LTS90B. 
Sustainablecatamarandesign...
S
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Thanks Hanaldo, being new to resin infusions I've been going through a really steep learning curve and had difficulty eliminating leaks I couldn't hear (pretty easily down to 30-60 millibar with a 6 cfm robin-air two state pump but taking days trying to track down leaks enough to get to 2-20 millibar...) and coincidentally enough I have been using AT200Y.
Is shelf life/storage of the tape also something to be very concerned with or simply relatively conscious of (working in Hawaiian heat where 85 degrees F in the shade but using freshly purchased tape, some of which doesn't have expiry date or manufacturing date...).
Best regards and thanks a million your advice may have saved my sanity trying to find leaks,
Dave


Hanaldo
Hanaldo
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Bagging tape definitely has an expiration date, it gets less tacky as it gets older. This is one reason I like the Cytec and Easy Composites tapes so much - they start off very tacky, which means that even as they get old they retain quite a good tack, and they are very pliable, which makes working them harder that much easier.

The AT200Y suffers badly with age. It is ok when it is brand new. But even by the time it is a year old, it has lost a lot of its tack. And because it is so firm, it is very taxing to work it and try to get it to stick properly.
Chris Rogers
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On the tacky tape thing - one tool that I really like is an aluminum roller with a handle and smooth radiused edges for rolling over the tape and pressing it down.  You can make holes in the bag if you swerve off the tape but it is a great tool for when you're still trying to get a better bag and your thumbs are tired.  Heat helps too - if you are working in a cooler room going over your sealant tape with a heat gun (or better - a hair dryer because its not as hot) and roller will often get you the last bit to get over your drop test or hit your target vacuum.  

I don't remember where I got mine but it looks like this:

https://www.bestmaterials.com/images/MR08580-large.jpg




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