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From: Nil on 4 May 2008 16:45
I guess this isn't quite on-topic for this group, but I figure many
people here have some experience with this...

A few years ago I bought a repair kit to replace the deteriorating foam
surrounds on my 10" JBL stereo speakers. At the time only one surround
needed doing, so I only used one surround. Now the other speaker needs
it, but I find the bottle of adhesive has dried up.

What kind of glue would you recommend for this? Rubber cement? White
(Elmers) glue? Contact cement? Other?
From: Chris Hornbeck on 4 May 2008 23:26
On Sun, 04 May 2008 15:45:18 -0500, Nil
<rednoise+news(a)REMOVETHIScomcast.net> wrote:

> a repair kit to replace the deteriorating foam surrounds

>What kind of glue would you recommend for this? Rubber cement? White
>(Elmers) glue? Contact cement? Other?

I hope you'll get better responses (than mine) from this,
but failing that: I've made various repairs over the years
with all kinds of adhesives.

The perhaps interesting bit is that the adhesives have to
connect point A to point B, via surround S, so the particular "A" and
"B" matter as much as anything else, including "S".

Rubber cement is almost never good for both surfaces. Elmers
white works in many old-fashioned speaker drivers with
paper cones, foam replacement surrounds, painted steel frames,
and little expected life expectancy. The usual case... But:

My strongest recommendation is to get a new bottle of the
original, but if you've ruled that out, you're into the
brave new world of chemical experimentation. Just stay
away from the brown acid and you'll be fine.

All the best fortune,

Chris Hornbeck
"It's for compatibility with 8-Track."
-scott
From: Chris Hornbeck on 4 May 2008 23:49
On Sun, 04 May 2008 15:45:18 -0500, Nil
<rednoise+news(a)REMOVETHIScomcast.net> wrote:

> so I only used one surround. Now the other speaker needs
>it, but I find the bottle of adhesive has dried up.

Posted seperately, so as to not be (as) mean (as required
to emphasize the issue):

Never, ever, ever, never, operate on a single speaker driver
of a pair. And, if you get yerself a single speaker and
intend to make it into a pair, you've got some cypherin'
to do. Less so, or more so, depends. And save the discarded
pieces for other folks trying to do the same.

Yeah, I know, it sounds like BS, but speakers vary a lot,
and matching isn't Rocket Surgery, so some minimal efforts
do actually pay off.


All the best fortune,

Chris Hornbeck
"It's for compatibility with 8-Track."
-scott
From: Richard Crowley on 4 May 2008 23:52
"Chris Hornbeck" wrote ...
> Nil wrote:
>
>> so I only used one surround. Now the other speaker needs
>>it, but I find the bottle of adhesive has dried up.
>
> Posted seperately, so as to not be (as) mean (as required
> to emphasize the issue):
>
> Never, ever, ever, never, operate on a single speaker driver
> of a pair. And, if you get yerself a single speaker and
> intend to make it into a pair, you've got some cypherin'
> to do. Less so, or more so, depends. And save the discarded
> pieces for other folks trying to do the same.
>
> Yeah, I know, it sounds like BS, but speakers vary a lot,
> and matching isn't Rocket Surgery, so some minimal efforts
> do actually pay off.

EXCELLENT ADVICE

Listen to the man.

This tale of woe is just ONE of the many issues you can
avoid by doing everything in balanced pairs.


From: Nil on 5 May 2008 00:21
On 04 May 2008, Chris Hornbeck <chrishornbeckremovethis(a)att.net> wrote
in rec.audio.pro:

> Rubber cement is almost never good for both surfaces. Elmers
> white works in many old-fashioned speaker drivers with
> paper cones, foam replacement surrounds, painted steel frames,
> and little expected life expectancy. The usual case... But:

I've continued to check around since I posted this question, and there
seems to be no real consensus. A favorite is called something like
"Flex 400" (not the real name, but I'm away from my notes). It doesn't
seem to be available anywhere retail, just in bulk from the
manufacturer. Some people seems to have had some success with plain ol'
Elmer's, but other people say it's the right category of adhesive, but
it's too stiff and brittle and there are other more flexible flavors.

I find several references to a glue called Weldbond Universal Space Age
Adhesive. It's supposedly similar to Elmer's White Glue and Wood Glue.
My local Ace Hardware carries it, so if nobody here warns me away from
it, I may pick up a bottle of the stuff this week.

> My strongest recommendation is to get a new bottle of the
> original, but if you've ruled that out, you're into the
> brave new world of chemical experimentation.

I emailed the small company I bought the repair kit from yesterday, but
I haven't heard back from them yet. He might not even be in operation
any more,

> Just stay away from the brown acid and you'll be fine.

Good advice!
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