I have a very oily forehead.
I don't know why, but it is what it is. So I was very excited to try out each of 3 mattifiers that were sent to me through my various beauty box subs over the last few months.
The first one was OC8 Professional Mattifying Gel (through Glossybox).
It claims: 8 hour matte finish, evens skin tone, for all skin types.