[pianotech] Sealing pinblocks

[Ron Nossaman]

Al Guecia/AlliedPianoCraft wrote:
> Hi All,
>  
> I don't remember seeing anything about sealing a new pinblock, so I'd 
> like to post a few questions.
>  
> 1. How many of you use a sealer of some kind when you install a new 
> pinblock?

I don't, and drill through.


> 2. If you do, do you think it adds to the stability or longevity of the 
> pinblock?

I don't see how or why it would. There are folks taking great 
pains to seal soundboards, bridges, and pinblocks, but 
humidity changes still throw the pianos out of tune because 
nothing entirely stops moisture transfer.


> 3. Has anyone done some tests to verify the results.

I haven't done any specific testing, but I have observed that 
my redesigned rebuilds with low compression panels and epoxy 
laminated veneer caps, are considerably more stable than 
anything else I've seen, with unsealed open holes in the 
bottom of the block.

I have nothing against sealing blocks, but I haven't seen 
anything indicating the need.
Ron N