Replace temporary patch with permanent patch?
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Replace temporary patch with permanent patch?
Postby kenwstr » Sat Dec 30, 2017 11:13 am
I had have used temporary patches for some time and usually they are OK for a good while. However they eventually fail so it's either chuck the tube or try to repatch. In the latter case, the temporary patch adhesive needs to be removed but the usual solvents (essential oils) for removing this type of adhesive also degrade the the tube, causing cracks and a weakened section of tube. If I try to scrape, sand etc. the adhesive off, it just gets smeared around and not removed, despite spending much time and effort on this. Permanent patching over this sticky mess will not adhere properly and is very likely to leak. So , is there an effective way to clean this sticky goop off the tube?
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Re: Replace temporary patch with permanent patch?
Postby Arbuckle23 » Sat Dec 30, 2017 12:33 pm
I only patch if I have more than one puncture when out.
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Re: Replace temporary patch with permanent patch?
Postby OnTrackZeD » Sat Dec 30, 2017 1:24 pm
Some heat may help in getting the glue off, caution needed.
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Re: Replace temporary patch with permanent patch?
Postby kenwstr » Sat Dec 30, 2017 1:27 pm
Ken
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Re: Replace temporary patch with permanent patch?
Postby kenwstr » Sat Dec 30, 2017 1:30 pm
I do the same but sometimes.....there are just too many thorns.OnTrackZeD wrote:I carry a spare tube and only patch if I need a second tube, that way I can fix it properly at home if I want to.
Some heat may help in getting the glue off, caution needed.
Haven't tried heat yet though, ta.
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Re: Replace temporary patch with permanent patch?
Postby Thoglette » Sat Dec 30, 2017 1:31 pm
I'm pretty sure plain ol' meths did the trick for me, post mechanical removal of the worst of it.kenwstr wrote: So , is there an effective way to clean this sticky goop off the tube?
Regardless, you're going to sand off the top layer of tube so don't worry about "denaturing".
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Re: Replace temporary patch with permanent patch?
Postby Bunged Knee » Sat Dec 30, 2017 1:38 pm
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Re: Replace temporary patch with permanent patch?
Postby kenwstr » Sat Dec 30, 2017 2:38 pm
Ken
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Re: Replace temporary patch with permanent patch?
Postby uad782 » Sat Dec 30, 2017 9:25 pm
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Re: Replace temporary patch with permanent patch?
Postby Tim » Sat Dec 30, 2017 9:44 pm
Self adhesive patches I think.
Although, in recent years almost every patch I've used has only been a temporary fix. They were once permanent.
I suspect the rubber is siliconised and nothing sticks properly any more. At least with certain tube brands.
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Re: Replace temporary patch with permanent patch?
Postby Mulger bill » Sat Dec 30, 2017 10:33 pm
That'd be it. I've got a few very old ones in my commuters pack that I've been fortunate to never need, always carry a spare tube or two as first roadside repair optionTim wrote:^^^
Self adhesive patches I think.
Although, in recent years almost every patch I've used has only been a temporary fix. They were once permanent.
I suspect the rubber is siliconised and nothing sticks properly any more. At least with certain tube brands.
London Boy 29/12/2011
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Re: Replace temporary patch with permanent patch?
Postby uad782 » Sun Dec 31, 2017 6:44 am
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Re: Replace temporary patch with permanent patch?
Postby OnTrackZeD » Sun Dec 31, 2017 11:20 am
The siliconised tubes are slippery when you press your finger and drag it over the tube. The old/original type drag and grip on the rubber.Tim wrote: I suspect the rubber is siliconised and nothing sticks properly any more. At least with certain tube brands.
You're right siliconised tubes are just about impossible to repair but I have come up with a technique that seems to work.
Sand and clean around the area that needs to be patched.
Apply rubber cement onto the tube and onto the path itself evenly.
Allow to dry completely 5 to 10 minutes.
Reapply glue to both tube and patch evenly.
When tacky apply the patch to the tube and apply pressure for 2 to 4 minutes.
I've had a patched tube in my rear wheel for 1500km with two repairs and to my surprise its holding up. Time to stop carrying the second tube that I added because of the repaired tube I installed.
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Re: Replace temporary patch with permanent patch?
Postby Thoglette » Sun Dec 31, 2017 12:58 pm
This is the critical bit for me.OnTrackZeD wrote: You're right siliconised tubes are just about impossible to repair but I have come up with a technique that seems to work.
Sand and clean around the area that needs to be patched.
Tease. Which Japanese ones? What's the difference?uad782 wrote:Thanks. Yes most patches are pretty useless these days. There are some Japanese ones I get that work really well.
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Re: Replace temporary patch with permanent patch?
Postby uad782 » Sun Dec 31, 2017 9:35 pm
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Re: Replace temporary patch with permanent patch?
Postby kenwstr » Mon Jan 01, 2018 2:43 pm
OK, so what I found is that rubbing with simple green and kitchen paper tends to remove the old adhesive better than metho (mostly methanol). Neither of these appear to have a significant adverse reaction with butyl (unlike essential oils like eucalyptus).
I agree sanding the tube over the whole area to be patched is essential.
Ken
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Re: Replace temporary patch with permanent patch?
Postby Thoglette » Mon Jan 01, 2018 6:46 pm
Thanks!uad782 wrote:Maruni patches. They are only small but seem to work really well.
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Re: Replace temporary patch with permanent patch?
Postby uart » Tue Jan 02, 2018 3:00 pm
In that case Ken then I'd recommend carrying a spare tube (or two) to use for the roadside repair, and then properly patching your tubes when you get home. I sometimes keep my old tubes if they only have a small hole, and then when I've got two or three to do I'll get out the patches and the glue. Removing old patches to repatch is too much fiddling around in my opinion.kenwstr wrote:The issue isn't economic. I feel that it's more environmentally responsible to repair.
I have to admit that I don't like using patched tubes too much on high pressure (narrow) tyres. Too unreliable. One wider tubes at lower pressure the reliability is a lot better though.
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Re: Replace temporary patch with permanent patch?
Postby Thoglette » Tue Jan 02, 2018 3:18 pm
Sound advice.uart wrote:In that case Ken then I'd recommend carrying a spare tube (or two) to use for the roadside repair, and then properly patching your tubes when you get home. I sometimes keep my old tubes if they only have a small hole, and then when I've got two or three to do I'll get out the patches and the glue. Removing old patches to repatch is too much fiddling around in my opinion.
I'm old enough to have used patched tubes almost as long as we've had HP tyres, well 700C perhaps . Never had a problem with patches.uart wrote:I have to admit that I don't like using patched tubes too much on high pressure (narrow) tyres. Too unreliable. One wider tubes at lower pressure the reliability is a lot better though.
At least not until these "siliconised" tubes arrived, and I think that a decent bit of sanding seems to have fixed that. Never less, I'm going to be looking for made in .de tubes from Conti and Schwalbe next time I go shopping.
"People are worthy of respect, ideas are not." Peter Ellerton, UQ
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Re: Replace temporary patch with permanent patch?
Postby uart » Tue Jan 02, 2018 7:00 pm
I'm always a bit uneasy the first ride on a patched tube. These days I've taken to mounting them on one of my spare wheels and just leaving them inflated for some time to "prove". If they survive a good while like that then eventually I'll use them, but unless I'm short of new tubes at the time I usually prefer to just carry them as spares.Thoglette wrote: I'm old enough to have used patched tubes almost as long as we've had HP tyres, well 700C perhaps . Never had a problem with patches.
Yeah, the very first thing that I do when I get a puncture repair kit is to throw away that cheap little metal rasp and throw in a good sized strip of cloth backed garnet paper (about 80 grit is ideal). I can do a much better job of roughing them up like that.At least not until these "siliconised" tubes arrived, and I think that a decent bit of sanding seems to have fixed that. Never less, I'm going to be looking for made in .de tubes from Conti and Schwalbe next time I go shopping.
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Re: Replace temporary patch with permanent patch?
Postby Kronos » Wed Jan 03, 2018 9:38 pm
I had to replace a tyre and tube because I rode on it for one too many rides. That was $25 down at my local bike store for a new tube. You can't do much other than phone a friend in that instance. The moral of the story is do it once and do it right or spend your beer money for a week on something you didn't need to spend it on.
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