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12 year old Yammy glue failure on 60% of the keys
#3051235 11/30/20 12:29 PM
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How many have run across this problem? I never have. Many keytops have fallen off and most of the others are on their way to falling off. The rest of the piano in excellent shape.

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Re: 12 year old Yammy glue failure on 60% of the keys
jkess114 #3051240 11/30/20 12:43 PM
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Take some pictures and send them to Yamaha. I would think they would like to know about this.


Semipro Tech
Re: 12 year old Yammy glue failure on 60% of the keys
jkess114 #3051260 11/30/20 01:14 PM
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An excellent idea.

Re: 12 year old Yammy glue failure on 60% of the keys
jkess114 #3051295 11/30/20 02:19 PM
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Which model of Yamaha? What material are the key tops? Which country of origin? A very unusual situation.


-Bill L. - former tuner-technician
Re: 12 year old Yammy glue failure on 60% of the keys
jkess114 #3051313 11/30/20 02:45 PM
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C2, manufactured for US market around 2003.

Re: 12 year old Yammy glue failure on 60% of the keys
jkess114 #3051355 11/30/20 04:51 PM
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Technically put of warranty, but they have been known to fix these anyway. Not good for the reputation. Clearly a defect.

Peter Grey Piano Doctor

Last edited by P W Grey; 11/30/20 04:51 PM.

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Re: 12 year old Yammy glue failure on 60% of the keys
jkess114 #3051405 11/30/20 06:43 PM
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I think their number is still 800-854-1569.


Semipro Tech
Re: 12 year old Yammy glue failure on 60% of the keys
jkess114 #3051502 12/01/20 03:40 AM
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You could just get some PVC-E glue and put them back on yourself. It's pretty easy.

Re: 12 year old Yammy glue failure on 60% of the keys
TimM_980 #3051562 12/01/20 08:24 AM
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Originally Posted by TimM_980
You could just get some PVC-E glue and put them back on yourself. It's pretty easy.

PVC-E glue is no longer available.


Ed Sutton, RPT
Just a piano tuner!
Durham NC USA
Re: 12 year old Yammy glue failure on 60% of the keys
TimM_980 #3051569 12/01/20 08:35 AM
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Originally Posted by Ed Sutton
Originally Posted by TimM_980
You could just get some PVC-E glue and put them back on yourself. It's pretty easy.

PVC-E glue is no longer available.

Do you mean the PVC-E glue I buy from supply houses has been discontinued?



Hi Tim
Originally Posted by TimM_980
You could just get some PVC-E glue and put them back on yourself. It's pretty easy.


That is the current plan barring Yamaha stepping up to offer "something". And at least for the time being I have enough PVC-E to glue about 1000 keys but I wonder what Ed means about no longer available.

Re: 12 year old Yammy glue failure on 60% of the keys
jkess114 #3051634 12/01/20 12:02 PM
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Yamaha had a warranty issue with this. I recovered a number of key sets for them. They will probably still cover replacement.


Professional Piano Technician serving the Tampa bay area. website: mckaigpianoservice.com
Re: 12 year old Yammy glue failure on 60% of the keys
Ed Sutton #3051798 12/01/20 09:00 PM
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Originally Posted by Ed Sutton
PVC-E glue is no longer available.

??
A quick google search seems to indicate it's available from many different sellers.


Musician / tuner
Re: 12 year old Yammy glue failure on 60% of the keys
jkess114 #3051885 12/02/20 06:06 AM
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I read a suggestion, I think it was in the PTG forum, years ago, that PVC-E might be the same as Evacon-R bookbinding adhesive https://store.bookbinding.co.uk/store/product/5130/Eva-con-R-Adhesive-500ml/

Some years ago I obtained some Evacon-R. I've never used it for a whole set of keys, just for little jobs here and there around the house - and for sticking some books together!

I stuck a plastic sharp to a little piece of mahogany and it stuck extremely well, even though the surface area of a plastic sharp is small, as they're hollow. I also stuck a plastic white key covering to a little piece of pine. That stuck too, though not as well as the sharp to mahogany - I was able to pull it off (after a week or two) though it would have stayed on had I not pulled. And I had not 'keyed' the surface of the pine by light sanding; it was very smooth.

I also stuck some little bits of felt to the mahogany, and they stuck well. It does take a while for the Evacon-R to dry. The blurb says it can be thickened with a starch paste, which might be worth doing, as it's pretty runny.

It looks and smells like PVA, but it is chemically different. It retails some flexibility, rather than drying brittle. Which, I guess, is what you need for bookbinding.

Re: 12 year old Yammy glue failure on 60% of the keys
jkess114 #3051910 12/02/20 07:36 AM
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Roo-Glue is presently being marketed as a substitute for PVC-E as well.

Peter Grey Piano Doctor


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Re: 12 year old Yammy glue failure on 60% of the keys
jkess114 #3051913 12/02/20 07:47 AM
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Oh that's interesting. Reading about Roo-GLue, it looks like it would work very well for key coverings.

Titebond seem to have an equivalent, "Melamine Glue" which I guess would work too.

Last edited by David Boyce; 12/02/20 07:49 AM.
Re: 12 year old Yammy glue failure on 60% of the keys
jkess114 #3051918 12/02/20 08:10 AM
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Yes ☺

Peter Grey Piano Doctor


Peter W. Grey, RPT
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Re: 12 year old Yammy glue failure on 60% of the keys
jkess114 #3052004 12/02/20 11:33 AM
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When I switched over from PVC-E to Roo Glue I tested them against each other. Roo Glue outperformed PVC-E.


Professional Piano Technician serving the Tampa bay area. website: mckaigpianoservice.com
Re: 12 year old Yammy glue failure on 60% of the keys
jkess114 #3052005 12/02/20 11:37 AM
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That's useful to know, Bill; thank you for sharing!

Re: 12 year old Yammy glue failure on 60% of the keys
jkess114 #3052009 12/02/20 11:44 AM
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Though, when I think about it, what were the performance criteria?

Re: 12 year old Yammy glue failure on 60% of the keys
David Boyce #3052030 12/02/20 12:36 PM
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That was my thought as well.


Semipro Tech
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