One of the frequently asked questions is "Does the sweat barrier have an expiration date?"
The sweat barrier does not have an expiration date after opening. Months or years later, you can use it to the last drop without waste.
It will be difficult to apply when the remaining liquid is low. In such a case, you can transfer (in addition to) the previous leftovers to your newly purchased sweat barrier.
It's been a sweaty season. Enjoy your favorite accessories with the sweat barrier.