sanding the inner tube

wlexxx@gmail.com

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.

landotter

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.

jobst.brandt@stanfordalumni.org

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

Frank Krygowski

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

Claus Assmann

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.

A Muzi

>> "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 **

Mark

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.

Paul Kopit

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.

jim beam

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.

John Forrest Tomlinson

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.

jobst.brandt@stanfordalumni.org

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

jim beam

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...

Tom Sherman

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

jim beam

Tom Sherman wrote:
<snip for clarity>

>
> [1] Pun intended.

so why wasn't it funny?

lightweight.