Re: Playing with the Fisher St-828's
Silicon can, as it offgasses while curing from what I have heard, but if you put it on and give it a few days to cure I believe it becomes completely inert. I could be wrong tho, if so someone please correct me. Tho if that is the case I'm sure you could do the same thing with latex based caulk.
I like the idea of the closed cell foam but sometimes getting it to conform around the edge of a circular hole, especially a very small one can be a bit tricky. Also when you are trying to get speakers flush mounted and are trying to be very exact how does one take into account the extra thickness added by the closed cell foam making the speaker stick out of the hole just a hair more?