The refillable roll-on has a different formulation to our spray deodorant, which is specifically designed for use in a roll-on. We wouldn't advise using the spray refill in the roll-on because it is less viscous (more watery, so it’s easier to spray) which means you won’t have the best experience. That's not to say you couldn't try – we would just advise you use one of our roll-on refills instead which is much more suited for the task.
Also please remember only our refillable roll-on packs can be refilled. The standard roll-ons are not designed for refilling and you may break the packaging if you attempt it.