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Yes, some silicone sealants have acetic acid cure which can out-gass a little. However, this makes this type good for etching to the surfaces to adhere to.
But, in this application best to use non-acetic acid cure something like Loctite 5145 tempflex. This is natural cure and is pretty much the same as the RTV 3145 military grade silicon rubber non-acetic.
This can be found RS components, element 14 and fleabay price can vary by RS ~$27 fleabay I saw for $9 USD.
Ok it's a little more expensive but very similar to stuff we used on F111 recon cameras depot repair level.
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