dvt said:Quoted message said:Slime is quite slippery. When it leaks out between the punctured tube
and the inside of the tire, it acts as a lubricant, not a glue. I
usually wipe a thin film of Slime out of the inside of the my tire
after a flat.
Slime clogs small punctures mostly by transporting very fine white
fibers to the hole. Indeed, with a small enough puncture, all you'll
see is a tiny wisp of white fiber sticking out. The process is
somewhat like clogging a drain pipe by pouring molasses full of
chopped-up rope down the sink.
I'll preface by saying I've never used Slime.
If the liquid component of Slime is a lubricant, how do you get a patch
to stick? I imagine that some of the lubricant escapes the puncture,
contaminates the exterior of the tube, and prevents adhesion. Perhaps
you use a solvent? Or is the classic sandpaper approach sufficient?
Dear Dave,
The Slime itself doesn't soak into or through the rubber, so just
wiping it off seems to work. Like you, I wondered about how well
patching would work, but I finally decided that the only way to find
out was to try it--it seems to work well enough that even a clumsy
patcher like me can do it.
I yank the tubes from the tire, replace them with good tubes from my
frame bag, and carry them home for patching.
By evil coincidence, I read your post just after I came up from the
basement, where five Rema patches are kissing five Slime tubes through
a tacky layer of Rema patch glue.
Five earlier tubes cured overnight and held modest test pressure.
Basically, you squeeze the Slime-and-fiber mix away from the puncture,
wipe the tube clean, introduce the tube to the sandpaper for luck,
slather the glue on, wait five minutes, slap the patch on hopefully,
and come back the next day.
I use the large round end of this vise as a work table for patching
five tubes at a time:
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=5655
With the vise closed, the round end sticks out 5 & 1/2 inches and is 2
& 1/2 inches wide. I expect that a cheap piece of white PVC plumbing
pipe would work well, too--I just want a solid, rounded surface that
holds the tube up at a convenient height.
(I had fifteen tubes ready for patching yesterday, since I fondly
imagine that an assembly-line approach saves time, increases
reliability, and yields at least a few successfully patched and tested
tubes.)
Given my poor skills and bad luck with mechanical matters, my patch
success rate is quite good. After one distaster that broke a spark
plug wrench, a friend who's a former motorcycle mechanic commented
that my ancestors were probably cursed by a blacksmith. If so, the
blacksmith may have had a brother who worked at a glue factory, since
almost nothing that I try to glue stays together.
But the Rema patches and glue from BikeToolsEtc have surprised me by
pretty much doing what they're supposed to do. I'm over half-way
through a box of 100 of the smaller fp0 patches for 700c tires:
http://www.biketoolsetc.com/index.cgi?id=440435462942&d=single&c=Tire-Tube&sc=Repair-Kits-and-Supplies&tc=Patches&item_id=RE-F0P
or http://tinyurl.com/fsvef
The fp0 probably stands for f(eathered) p(atch size #)0, as opposed to
the larger fp1 patches:
Here's the Rema glue:
http://www.biketoolsetc.com/index.cgi?id=440435462942&d=single&c=Tire-Tube&sc=Repair-Kits-and-Supplies&tc=Cement&item_id=RE-203
or http://tinyurl.com/gvgv9
For most posters, 100 patches and an 8 ounce can of glue might be
overkill, but I get a lot of flats.
I don't use it, but fanatics might try the Rema liquid rubber buffer:
http://www.biketoolsetc.com/index.cgi?id=440435462942&d=single&c=Tire-Tube&sc=Repair-Kits-and-Supplies&tc=Rubber-Buffer&item_id=RE-71
or http://tinyurl.com/hb96s
You can browse for smaller quantities at BikeToolsEtc--just search for
"Rema".
As for on-the-road patching, I've only had to do that once after
several flats ate up all four of my spare tubes.
I pulled the little Park glueless patch kit out, read the directions,
and apprehensively gave the clear plastic rectangle a try--it worked
like a charm for me, though other posters complain about problems with
glueless patches.
http://www.performancebike.com/shop/Profile.cfm?SKU=942&item=00-6856&slitrk=search&slisearch=true
or http://tinyurl.com/g4586
I bought my $3 Park patch kit from Performance, but lots of other
places sell them. The little plastic case is tiny, flat, quite
convenient, and a considerable comfort when I'm replacing my second
flat on a 15-mile ride.
One reason for tossing a Slime tube in the trash is more punctures to
patch than seems reasonable. Where goatheads flourish, a tube can look
as if it lost a fight with a porcupine, with half a dozen punctures
revealed when the tube is tested by inflating and dunking in a sink.
The other reason for throwing a Slime tube away is the annoying
puncture right next to the valve stem, up on the sidewall. Even if I
got the patch to stick, I'd probably pull it loose fiddling it into
the tire and wiggling the valve stem around, so I don't even tempt the
gods of mechanical failure by trying.
Cheers,
Carl Fogel