Lawyers. Since ASTM 2170 endorses sealing, I'm not so sure a lawyer would go down that path. A pure silicone I suspect would be preferable, or even a urethane. I've been using the Loctite for well over a year now and noticed no effect on my readings + or -. Plus, you just about have to use a utility knife or screwdriver to break the bond loose once it dries.
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