sanding the inner tube

when doing flat repair,

what is the exact reason[s] for sanding the tube prior to applying the
glue?

a. knock off dirt and dust, possibly talcum powder

b. reveal a fresh, lower layer of rubber that will stick better

c. completely remove all ridges, bumps, projections so the air won;t
leak around

?

wle.

On Jun 25, 1:40 pm, "wle...@gmail.com" <wle...@gmail.com> wrote:
> when doing flat repair,
>
> what is the exact reason[s] for sanding the tube prior to applying the
> glue?
>
> a. knock off dirt and dust, possibly talcum powder
>
> b. reveal a fresh, lower layer of rubber that will stick better
>
> c. completely remove all ridges, bumps, projections so the air won;t
> leak around
>
remove the mold release from the tube.

someone wrote:

> When doing flat repair, what is the exact reason[s] for sanding the
> tube prior to applying the glue?

> a. knock off dirt and dust, possibly talcum powder

> b. reveal a fresh, lower layer of rubber that will stick better

> c. completely remove all ridges, bumps, projections so the air won;t
> leak around

http://www.sheldonbrown.com/brandt/patching.html

Jobst Brandt

On Jun 25, 2:42 pm, landotter <landot...@gmail.com> wrote:
> On Jun 25, 1:40 pm, "wle...@gmail.com" <wle...@gmail.com> wrote:> when doing flat repair,
>
> > what is the exact reason[s] for sanding the tube prior to applying the
> > glue?
>
> > a. knock off dirt and dust, possibly talcum powder
>
> > b. reveal a fresh, lower layer of rubber that will stick better
>
> > c. completely remove all ridges, bumps, projections so the air won;t
> > leak around
>
> remove the mold release from the tube.

Would a solvent do the job more quickly? Has anyone tried carrying a
few ml of acetone in a tiny bottle, and using that?

- Frank Krygowski

Frank Krygowski wrote:

> Would a solvent do the job more quickly? Has anyone tried carrying a
> few ml of acetone in a tiny bottle, and using that?

That's what I used (at home, not on the road). It works very well.

>> "wle...@gmail.com" <wle...@gmail.com> wrote:> when doing flat repair,
>>> what is the exact reason[s] for sanding the tube prior to applying the
>>> glue?
>>> a. knock off dirt and dust, possibly talcum powder
>>> b. reveal a fresh, lower layer of rubber that will stick better
>>> c. completely remove all ridges, bumps, projections so the air won;t
>>> leak around

> landotter <landot...@gmail.com> wrote:
>> remove the mold release from the tube.

Frank Krygowski wrote:
> Would a solvent do the job more quickly? Has anyone tried carrying a
> few ml of acetone in a tiny bottle, and using that?

We did for years, when we patched[1]. The auto industry once used
trichlorethylene, sold as 'patch buffer', which removes virtually all
surface contaminants quickly without a residue. Tech brand for us but
there are/were others. Any volatile solvent without a residue [2] should
work essentially the same and give a dependable result.

Wrapping the tube across the back of one's hand allows cleaning ( by
solvent or abrasion) without touching the cleaned area. Dirty fingers on
the target area make for a poor bond.

[1] Tubes have not changed price in 20+ years but US labor costs have.
[2] Tape deck cleaner, isopropyl alcohol, annhydrous ether, MEK -
whaddya got handy? Trichlor won't readily ignite, which was nice.
--
Andrew Muzi
<www.yellowjersey.org/>
Open every day since 1 April, 1971
** Posted from http://www.teranews.com **

A Muzi wrote:
> Frank Krygowski wrote:
>> Would a solvent do the job more quickly? Has anyone tried carrying a
>> few ml of acetone in a tiny bottle, and using that?
>
> We did for years, when we patched[1]. The auto industry once used
> trichlorethylene, [...]

I remember hearing that Trichlor is nasty stuff, so I looked up an MSDS
and see that "Workers chronically exposed may exhibit [...] increased
cardiac output." Time for a new doping thread on RBR!

Reference: http://www.jtbaker.com/msds/englishhtml/t4940.htm

Mark J.

On Thu, 26 Jun 2008 12:37:38 -0500, A Muzi <am@yellowjersey.org>
wrote:

>[1] Tubes have not changed price in 20+ years but US labor costs have.
>[2] Tape deck cleaner, isopropyl alcohol, annhydrous ether, MEK -
>whaddya got handy? Trichlor won't readily ignite, which was nice.
>--

I was riding on a drizzling day and got a flat w/o a spare but with a
patch kit. Wet sandpaper doesn't do it. Patching was really
problematical. A rider came by and showed me a trick. Put glue on
and wipe it off. Then put glue on. The glue has solvent in it and
that would clean the mold release off the tube.

Paul Kopit wrote:
> On Thu, 26 Jun 2008 12:37:38 -0500, A Muzi <am@yellowjersey.org>
> wrote:
>
>> [1] Tubes have not changed price in 20+ years but US labor costs have.
>> [2] Tape deck cleaner, isopropyl alcohol, annhydrous ether, MEK -
>> whaddya got handy? Trichlor won't readily ignite, which was nice.
>> --
>
> I was riding on a drizzling day and got a flat w/o a spare but with a
> patch kit. Wet sandpaper doesn't do it. Patching was really
> problematical. A rider came by and showed me a trick. Put glue on
> and wipe it off. Then put glue on. The glue has solvent in it and
> that would clean the mold release off the tube.


potd.

On Fri, 27 Jun 2008 15:59:25 -0700, Paul Kopit <p.kopit@verizon.net>
wrote:

>I was riding on a drizzling day and got a flat w/o a spare but with a
>patch kit. Wet sandpaper doesn't do it. Patching was really
>problematical. A rider came by and showed me a trick. Put glue on
>and wipe it off. Then put glue on. The glue has solvent in it and
>that would clean the mold release off the tube.

Whoa. Thanks for that info -- could prove very useful.

Paul Kopit wrote:

>> [1] Tubes have not changed price in 20+ years but US labor costs
>> have. [2] Tape deck cleaner, isopropyl alcohol, anhydrous ether,
>> MEK - whaddya got handy? Trichlor won't readily ignite, which was
>> nice.

> I was riding on a drizzling day and got a flat w/o a spare but with
> a patch kit. Wet sandpaper doesn't do it. Patching was really
> problematical. A rider came by and showed me a trick. Put glue on
> and wipe it off. Then put glue on. The glue has solvent in it and
> that would clean the mold release off the tube.

Two points:

Wet sanding with a cloth backed belt sander strip works fine and the
belt sander doesn't disintegrate when wet.

Water and rubber solution make a rough and lumpy smear if the tube
isn't already wiped nearly dry with a cloth or paper.

I find patching in the rain uncomfortable but with a bit of shelter
goes alright. Use your back up tube and patch the punctured one later
where you can do a good job.

Jobst Brandt

jobst.brandt@stanfordalumni.org wrote:
> Paul Kopit wrote:
>
>>> [1] Tubes have not changed price in 20+ years but US labor costs
>>> have. [2] Tape deck cleaner, isopropyl alcohol, anhydrous ether,
>>> MEK - whaddya got handy? Trichlor won't readily ignite, which was
>>> nice.
>
>> I was riding on a drizzling day and got a flat w/o a spare but with
>> a patch kit. Wet sandpaper doesn't do it. Patching was really
>> problematical. A rider came by and showed me a trick. Put glue on
>> and wipe it off. Then put glue on. The glue has solvent in it and
>> that would clean the mold release off the tube.
>
> Two points:
>
> Wet sanding with a cloth backed belt sander strip works fine and the
> belt sander doesn't disintegrate when wet.

which has /nothing/ to do with solvents.


>
> Water and rubber solution make a rough and lumpy smear if the tube
> isn't already wiped nearly dry with a cloth or paper.

that's the least of your problems. did you bother to read the bit about
application and subsequent removal?


>
> I find patching in the rain uncomfortable but with a bit of shelter
> goes alright.

brilliant holmes! i don't know how you work this stuff out!


> Use your back up tube and patch the punctured one later
> where you can do a good job.
>

er...

Andrew Muzi wrote:
> - Hide quoted text -
> Frank Krygowski wrote:
>> Would a solvent do the job more quickly? Has anyone tried carrying a
>> few ml of acetone in a tiny bottle, and using that?
>
> We did for years, when we patched[1]. - Hide quoted text -
>
> [1] Tubes have not changed price in 20+ years but US labor costs have.

Inflation adjusted? [1]?

Not to mention there is less of a liability issue with using new tubes.

[1] Pun intended.

--
Tom Sherman - Holstein-Friesland Bovinia
The weather is here, wish you were beautiful

Tom Sherman wrote:
<snip for clarity>

>
> [1] Pun intended.

so why wasn't it funny?

lightweight.

"jim beam" wrote:
> Tom Sherman wrote:
> <snip for clarity>
>
>>
>> [1] Pun intended.
>
> so why wasn't it funny?
>
> lightweight.
>
Oh gee, I seem to have a stalker. No wonder "jim beam" refuses to use
his real name.

--
Tom Sherman - Holstein-Friesland Bovinia
The weather is here, wish you were beautiful