I don't know what kind of silicone someone used before I got
involved. When I can grab one end of a silicone bead and pull it
out of the joint without breaking it, it tells me it was not
adhered to either surface. Try that with a bead of NP1 or
equivalent single part urethane.
Silicone is very sensitive to different types on different
substrates and will usually require priming. The NP of NP1 stands
for No Prime.
Keep the whole world singing . . . .
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