[pianotech] Sealing pinblocks

[Al Guecia/AlliedPianoCraft]

Thanks for the reply Ron. I haven't been sealing them, but I was just 
wondering if sealing would help keep the tuning pins from getting loose over 
time.

Al



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From: "Ron Nossaman" <rnossaman at cox.net>
Sent: Sunday, September 13, 2009 6:19 PM
To: <pianotech at ptg.org>
Subject: Re: [pianotech] Sealing pinblocks

> 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
>