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#1
07-19-2010, 07:54 PM
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Hm, I had been thinking to myself that maybe there was a way to seal the crack. But... I was under the impression that losing the vacuum ruins the tube and there was no way to get that vacuum back once air got in there.
So uh, I could seal my crack with silicone and run the set for awhile and see if that helps? Hm, since I don't have any way of running my filament other than the tv itself ( that I'm aware of ) I guess this is something I'll have to try once I get all my caps replaced. Last edited by RitchieMars; 07-20-2010 at 05:02 AM. 
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#2
07-20-2010, 06:59 AM
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Quote:
http://www.silicones-science.com/grades_elastomers.html John
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#3
07-20-2010, 07:51 AM
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Well, if luck is on this tube's side-would just putting something over the crack be of benefit? After all, the leak is rather small, so the perceived pressure gradient may not be too extreme. Are there any other relatively available materials out there that are relatively impermeable to the atmosphere but still effectively bond to glass?
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#4
07-20-2010, 08:55 AM
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If grimer has a good tube for you, that seems better all around than trying to seal a big crack.
There is an expensive product called Vacseal. Some folks apply it on the leak-prone parts of 15GP22 tubes on the theory that it can't hurt and might help prevent future leaks. http://www.2spi.com/catalog/vac/vacleak.shtml Even if you seal that crack, I'd be concerned that heating & cooling during normal operation could make the whole thing go PLINK at any time. Once a crack starts, the weakness may put stresses on the rest of the neck. Phil Nelson
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#5
07-20-2010, 09:42 AM
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I used RTV-1. It worked fine for 2 years until the fly failed. The set was then pitched.
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