I looked into these and settle with high temp orange compatible with tranny fluid. Also, you really want to let it cure overnight before adding liquid. Actually worked wonders even on my buddies thermo housing that stripped a bolt on. Just clamped and let sit over night, no leaks.
Funny as hell, my buddy stripped the bolt trying to tighten a gasket into place. It kept leaking he went past torque limit trying to stop leak. I would never use gasket anymore, rtv way to go. Follow directions on bottle, let dry an hour in open air, go around bolt holes, tighten loosly, let sit overnight, torque bolts, this is very forgiving if you follow instr.