What glue to use for cone?

[Vivek]

Hi all,
Some drivers I have are in a bit of trouble. The surround which is stuck to the cone is beginning to come off. What kind of glue should I use to stick it? Will a synthetic rubber based adhesive do or should it be the Loctite super glue kind of thing?

Thanks and regards,
Vivek

[cathode_ray]

use flexible glue - such as rubbur or silicone. Hard glue such as cyanoacrilates(superglue) will crack or the cone/surround at the edge of the glue will fail...

[Buckapound]

I recently discovered a two-part flexible polyurethane adhesive that comes in little tubes like epoxy. It seems to stick to anything and remains flexible after curing, which takes about half an hour to set up. Not an exotic product, I got it at the hardware store.

I haven't used it to repair speakers, but it is what I'd reach for if I had to.

--Buckapound

[Vivek]

Like I said, I have rubber-based adhesive with me. I could use that or I could even get Araldite. Which is better?

Vivek

[BlueWizard]

Part Express, and I suspect other speaker sellers like Madisound, sell glue specifically for gluing speakers. It appears to be white glue so I can't guarantee that it is not repackaged carpenter's glue. But none the less, it is the glue they include in the speaker surround and dust cap repair kits.

http://www.partsexpress.com/pe/showd...number=340-076

I'm sure that other places that specialize in replacement surrounds, replacement dust cap, and re-coning also have specialized glue available for speakers. It's just a matter of searching it out.

Steve/bluewizard

[cathode_ray]

White glue is very brittle(elmer's). Carpenter's glue (yellow) is a bit more flexible and a LOT stronger. Easy to deal with.
Neither will stick to rubber - urethane will. If it touches surround I'd be careful not to impede suspension.

[HK26147]

I have used the speaker specialty glues mentioned above ( Madisound & P.E. ), and inspected the Material Sheet and they appear to be indistinguishable from the flexible soft glues I mentioned earlier ( Aleene's etc ).

In the situation of Vivek: I would use the rubber adhesive if that were my only options.

I repaired the butyl rubber surrounds on Vifa 8" drivers using Silicone sealants meant for glass.
Pittsburgh Corning makes a compound for glass block.
Auto Glass repair shops use a thin viscosity silicone sealant ( for windshields ), that also has worked.

[valveitude]

This is the stuff that was included in a speaker repair kit (new surrounds) I purchased last year...

http://www.discountschoolsupply.com/...es=10190200000

It adhered perfectly to both the foam surround and the poly cones of a pair of Paradigm Titans..still playing strong a year later.

[BlueWizard]

Aleene's 'Tacky' glue appears to be a fabric glue and could probably be purchased at the local fabric or Hobby/Craft store. It is certainly cheap enough, and I suspect that, to some extent, it is water soluble. Can you confirm that? ...water clean up?

As to using Silicone, my experience with silicone caulking is that it is a mess. You have to place it exactly where you want it, any overflow or expansion beyond where you want it, is a mess to clean up. So, if you are careful and precise, then good, but I suspect it is not forgiving of mistakes.

Though, you would have to be extremely careful around cones and domes, I would think any unwanted mess created by a water soluble glue could be touched up with a damp cloth.

I've seen this Aleene's glue recommended in other thread, so I think it is a common consensus that it can safely be used on speakers.

http://www.duncancrafts.com/aleenes/

Just a few thoughts.

Steve/bluewizard

[HK26147]

It is water cleanup.
( Aleene's and Rosco Flexbond are staples for making stage props and set work ).
Silicone is more messy, but I use very very little, applied with a toothpick, or pin vise.
For a rubber surround, I fabricate a plastic scraper that is a "negative" form of the semi-circular surround.