Not sure if this well know or not nut in the corner if you do b113, overhead tail whip The gap you can armor through will need reverse inputs and will cause it to whiff if there is no hitbox behind the move
There are some armored reversals that will still hit even though the opponent's inputs have been crossed up, like Raiden's EX Vicinity Burst, Tempest Lao's EX Spin and Sektor's EX Flamethrower.
The characters I listed just don't have to worry about getting crossed up in the first place. Doesn't matter if they crouch block or stand block either.