You can buy a gasket remover spray works awesome on stuck gaskets and it would likely dissolve the permatex. Denatured will be better than isopropyl.
Technical Data Sheet Permatex Ultra Grey Gasket Maker Devcon
How to remove permatex. If it is stuck on there i use a fine cleaning pad on zz gun and clean it that way. Fast orange hand cleaner products remove resins oil grease tar grime soil printers ink and much more. Use your socket set or screwdriver to remove the piece. Permatex silicone ceramic extreme brake parts lubricant protects and lubricates every part of a brake assembly and prevents comebacks caused by irritating brake noise. According to loctitepermatex once dried strong solvents such as paint remover will be required to remove loctite extend rust treatment from equipment and clothes. I usually just aim the heat gun at the part and wait and wait then try to loosen the part.
Yes they work very well permatex even makes some ive used them alot loctite makes a gasket material that works very well for machined surfaces or any other if you dont have a gasket. Mechanical abrasion may be necessary they also say that continuous exposure. Heat breaks down loctite threadlocker adhesives allowing you to work the screw or nut loose with regular tools. To water solvents or chemicals can cause whitening blistering or flaking of the latex film. Irc alcohol is the cleanup agent for the aforementioned permatex as well as indian head gasket cement. The black adhesive can also be used to create seals around wood plastic ceramic and glass materials.
If it doesnt move apply more heat. You just need a heat gun a cheap harbor freight one will do on high to soften the loctite. I cant remember the actual temperature needed to loosen the stuff but its up there. If the valve covers has a grove that they put sealant in there use a pick and take it out piece by piece not easy and time consuming if you know somebody with a parts washer will be best way please let me know if that works for you. Both of those products are shellac based. The permatex black silicone adhesive is a general purpose compound that is designed to create a seal around mechanical components.