@social-assassin Hi P, Happy Holidays to you too and that's a good question! You can use any oil concentrates with the device as long as you will put the wax pad insert first before the concentrate. Also, please keep in mind not to use concentrates that are too liquid or watery that it can get inside the device. If you have any more questions or concerns, feel free to ask or send us an email at cs@airvapeusa.com. Have a great day ahead!