That's all I've ever used. High temp RTV. Never had one problem. A bottom tap cleans threads right up. I've seen that liquid teflon goine on teardown. Not a trace. Every time I've done teardown with RTV, it's always still there doin its job. I even use it on head bolts such as in my Ranger I just got done with. There are 4 steps to torque them down and they are stretch to yield, but I use it anyway. Some may argue it changes the torque and it may, but as many as I've used it on, I've never had a problem related to head bolt clamping force. It's just good insurance.
