lum gim fong,

Yes, patching (when successfully accomplished) is permanent--as permanent 
as any inner tube can be.

In addition to the other suggestions here that reinforce following the 
directions carefully, I suggest:

1) inflating the unmatched tube as much as possible before applying the 
patch to help reduce the amount of stretching that occurs after
re-inflating: the patch will keep the tube from stretching evenly 
underneath the patch itself.

2) Rolling over the patch once it is applied to the tube- 

 

a) place the tube on a wide, flat, and hard surface, then

 

b) use a frame or floor pump barrel like a rolling pin and roll across the 
patch in different directions. 


 Rolling the patch like a pie crust helps cement the patch completely, 
IMHO. Not sure where I learned this step but it seems to help.

If any patch has failed to work you will know very quickly that the attempt 
was unsuccessful. Just try it again.


Jon Spangler
Alameda, CA

On Tuesday, October 3, 2017 at 2:43:42 PM UTC-7, Reed Kennedy wrote:
>
> I must have installed at least a hundred patches over the years. (I used 
> to run narrow high pressure tires, and used to get more flats.)
>
> I've had a handful of patches fail. These generally fall in to one of two 
> categories:
>
>    - Put the puncture too close to the edge of the patch (to cover a big 
>    cut, or to try and cover both holes in a snakebite puncture with one small 
>    patch).
>    - Puncture right near the seam of the tube. (Sometimes it forms a 
>    little channel for air to get out.)
>
> Even considering those, I have a patch failure rate of much below 5%. I 
> consider it a permanent, reliable fix.
>
> And what's the alternative? Throwing away a tube after every tiny 
> puncture? What a waste!
>
>
> Best,
> Reed
>
> On Tue, Oct 3, 2017 at 2:36 PM, lum gim fong <john1...@gmail.com 
> <javascript:>> wrote:
>
>> *What is your track record with patching?*
>>
>> Has it worked like a permanent, reliable fix for the tube?
>>
>> I hear differing opinions about this.
>>
>> I can save some $$ if patching is a permanent fix.
>>
>>
>> Not interested in tubeless at all. Just wondering about question in 
>> subject title. Thanks.
>>
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