[Boatanchors] Re: speaker cement

[WA5CAB at cs.com]

Actually, silicone seals make very poor adhesives.  And their film thickness 
is excessive.  Mucilage (50's vintage school kids paper cement) will work OK 
if you use a patch.  But I wouldn't think it would survive long on a staight 
edge bond.  Super Glue would work OK for a patch.  But you only get one chance 
to position the patch.  If you miss, you start over with a larger patch.  But 
it would take a long time to cure for a simple crack.  Rubber cement?  Naah.  
Worse than silicone seal.  Weather seal adhesive is contact cement.   Similar 
to Super Glue in that it's intended that you stick two pieces together and 
almost immediately they are bonded and immovable.

GC Service Cement, which is similar to Duco Cement or Airplane Cement, is 
moderately flexible when cured, has a relatively long cure time but will hold 
patches in place immediately (relatively high tack and viscosity).  I've repaired 
hundreds of BC-611 earphones and microphones and never use anything else.

In a message dated 5/2/2007 10:13:49 PM Central Standard Time, 
krkaplan at cox.net writes: 
> Probably everything you mentioned except mucilage (weird sounding word) 
> will work. I've had 
> good luck with a product called Pliobond. It's made by Ashland Oil. Just 
> Google it. It remains 
> pliable which, I suppose, is why they call it what they call it. 3M makes a 
> weather strip 
> adhesive that would probably do a good job.
> 
> Ken
> 
> >I know, this is a bit off-topic but here goes anyway. I am restoring 
> >an old Philco table radio and I hate to replace the entire speaker due 
> >to a short tear on the cone. I see products like GC radio/TV service 
> >cement advertised but am curious if anything will do that I already 
> >have and that includes silicones, rubber cement, super glue, mucilage 
> >(boy, that dates me, huh) ...etc.
> >Speak to me people (pun intended)
> >73, Dick KF4NS
> >St Petersburg, FL 33714 USA
> >Keep The Glow! 
> 

Robert Downs - Houston
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