Most mechanics would suggest against any additives to fix a leak....
From my knowledge, additives that are suppose to stop leaks do so by softening/swelling old gaskets.
According to your post, you used anaerobic stuff, so if you put in an additive, I am not sure its gunna help you.
I know its not what you wanna hear but it may require you to try again...
but maybe others will have another out for you.