How to Apply a Roll-On Underarm Deodorant. Roll-on underarm deodorant is just one of the many types of underarm deodorant available on the market. It is easy to apply; just follow the steps below.
Open the roll-on underarm deodorant package and take off the lid.
Remove the foil cover if there is one.
Shake the roll-on deodorant bottle.
Lift your arm above your head, and roll the ball against the skin of your underarm area.
Shake the roll-on deodorant bottle again.
Lift your other arm above your head, and roll the ball against your other underarm area.
Allow the deodorant to dry before putting on clothing.