<< Is there any solvent that disolves this stuff, once cured ?
Of the common solvents, methylene chloride in common paint strippers does a
pretty good job of making the silicone swell up and lose its adhesion. If your
substrate can tolerate it, try that first. Otherwise, careful work with a razor
blade may be the best recourse. Silicones have limited resistance to many
solvents in respect to the solvent swelling phenomenon. HTH