Path: news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail From: AMuzi Newsgroups: rec.bicycles.tech Subject: Re: Very Slow Leaks. Date: Tue, 6 May 2025 14:33:02 -0500 Organization: Yellow Jersey, Ltd. Lines: 68 Message-ID: References: <7D6SP.248942$s5Kd.98838@fx14.iad> <5ihk1kpgm9olme5piu7s6rbtrvce4g4gdd@4ax.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Injection-Date: Tue, 06 May 2025 21:33:02 +0200 (CEST) Injection-Info: dont-email.me; posting-host="6c2cc9a9228d19fb06e2326604097db9"; logging-data="3834457"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX18clEUjhmf+Bo3qtDn18yaw" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:xDUASb5v9imo2DAklAAlEHyGFR8= Content-Language: en-US In-Reply-To: On 5/6/2025 1:41 PM, Frank Krygowski wrote: > On 5/6/2025 1:42 PM, Jeff Liebermann wrote: >> On Tue, 06 May 2025 10:19:59 -0700, Jeff Liebermann >> >> wrote: >> >>> I once bought some inner tubes that seem to have come >>> from the factory >>> with leaks. (...) >> >> A bit more.  I didn't have enough patches handy, so I used >> a small >> blob of automotive "gasket maker" to plug the hole. >> > makers/permatex-ultra-black-rtv-silicone-gasket-maker-5-oz/> >> I didn't ride enough to determine how many months or miles >> the black >> goo was going to last, but it seems like it would work on >> small pin >> holes.  I don't recommend it for large punctures, long >> cuts or cracks. > > Please do report back on that once you've got some miles on > the tire. I take it you let it dry in place before > reassembling the tube & tire? That would prevent the > technique from being useful during a ride. > > I've never used a compound like that for its intended use, > i.e. replacing gaskets. I've almost always just used the > proper gasket for whatever I was working on. A few times > I've had to cut my own gaskets out of gasket paper. I'd be > interested in feedback here on how well that stuff works. It > looks handy. > >> Also, I had some slow leaks that were difficult to find >> using soapy >> water.  (At the time, I didn't think to try the ultrasonic >> leak >> detector).  So, I over-inflated the inner tube.  I think >> it's probably >> 26 x 1 3/8: >> > tube.jpg> >> Not only did the soapy water detect the leaks, I could >> hear the air >> leak and also feel the air with my fingers.  Also, the >> normal size of >> the tire is the mounted tire located behind the over- >> inflated tire. > > I almost always inflate my flatted tubes much more than what > your photo shows. I think it helps a lot. I rarely have to > dunk a tube to find a hole. Passing the inflated tube close > to my face usually allows me to feel the air escaping, > especially if the stream hits my lips or thereabouts. > Working in a quiet basement workshop (where I do most of my > tube patching) also helps a lot, I think. > Me too on paperlike gasket material, but we're old. A lot of modern systems specify a gasket sealer: https://www.3m.com/3M/en_US/p/d/v000087446/ -- Andrew Muzi am@yellowjersey.org Open every day since 1 April, 1971