What's a good solvent for this?
I've found that the easiest is
paint stripper (methylene chloride type) or, if you already have some, Permatex Gasket Remover.
Locktite says:
Cured product can be removed with a combination of soaking in Permatex Gasket Remover and mechanical abrasion such as a wire brush.Note that the MSDS for Permatex Gasket Remover
LINK is about
65% methylene chloride, so use what you have on hand.
John