592 is an EXCELLENT thread sealant. It has a similar chemical to Loctite thread-lockers, so it doesn't "dry" so much as it "cures". It does a GREAT job.
Anti-seize can be used as a thread sealer. It's not my first choice unless the female-threaded casting is aluminum.
You'll probably be fine. If I'm threading into iron or steel, I use Loctite/Permatex 592.
RTV Silicone has NO PLACE in this repair. RTV Silicone can be used to REPLACE gaskets, but should not be used as a gasket dressing or gasket sealer. RTV Silicone should not be used on threaded fittings, or on bolt/nut threads, in part because it will cure before you have a chance to re-torque bolts after initial running of the engine--and then the RTV shreds during the retorque. Shredding RTV is also why you never use it on an oil system--you may not get the RTV back out when it's disassembled, and RTV pieces then plug the oil passages.
The ONLY time I use RTV on a gasket is when the gasket mates with another gasket, or with rubber seal. I put a dab of RTV at the seam between the two gaskets, or between the gasket and seal.
I used to use Weatherstrip Adhesive (Yellow Death) to glue gaskets to castings or to valve covers, but I quit doing that when I discovered "real" gasket adhesives.
There's a hundred gasket dressings or gasket sealers. They all work better than RTV Silicone. Some brand names are: Gasgacinch, High Tack, Copper Coat, Indian Head, Permatex #1, #2, and #3. Hylomar is really good--and hatefully expensive. Gasgacinch does 95% of what Hylomar does, at 1/10 the price.