Since you are applying it as a shampoo which you wash out of your hair in the shower, how would you expect it to perform?

ummm... sand I guess that part of it would have to remain, or you could have a spray that apply like hairsprair afterwards

Sand is right. If it was soap based it would dissipate once you began lathering with it. Perhaps an antiperspirant you could apply in the shower after you finished soaping up would work better? I am not sure how healthy it would be to keep all the sweat and toxins it releases inside your body though.

The perfumes in soap tend to linger a few hours after a shower. My guess is at least some of the antiprespirant would likewise remain.

Instead of the shampoo you could put it in a conditioner.