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malcontent 26th February 2007 04:14 AM

glue for voice coil wires
Hello all,

I am attempting to restore an old RCA speaker. I was wondering if anyone here knew what kind of adhesive most manufacturers used.

I am refering to the shiny black glue, that most older paper cone speakers had, holding down the voice coil wires.

My speaker has a 'damping ring' and 'diffuser cones', also glued with this same substance and I would like to put them back with the same.

Thanks, Eric

malcontent 5th March 2007 10:21 PM

After extensive searching, I had thought I had found the correct adhesive; "Airflex 400".

But upon finally obtaining some, it turns out to be a clear/white glue.

Surely someboby has tried to get the 'shiny black' glue to recone/recap/rewind some speaker.

Please help. I have googled my *#@ off, to no avail.

Thanks, Eric

Geoff H 5th March 2007 11:24 PM

Hi malcontent, I think what you are looking for is bitumen paint. Try the plumbing area at the hardware store. It is definitely useful on surrounds. Should keep the VC wires in place.


edit: PS What do you use for dismantling, acetone?

malcontent 6th March 2007 12:08 AM


Thanks for the reply. For the 'diffuser cones' I carefully scratched the adhesive away with an xacto knife. (Slow and used a suprising number of blades), as it was in a 'bead' on the surface.

I am replacing the surrounds, but the foam damper was also glued on with it and I have a new one.

I have restored cars, amps and furniture. Restoring a paper object is new for me. I will check into bitumen paint. What is it used for? (In case we have a different name for it here).


qwad 6th March 2007 12:24 AM

:D Hi There, you could also try a touch of black silicone gasket stuff:D all the best TC

Geoff H 6th March 2007 01:12 AM

Hi Eric. The bit paint is used for sealing roofing iron, downpipes etc. On paper and surrounds it remains tacky, flexible and viscous.

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