It does dry up any oil, but its not over drying. It's not like toners, the product is close to creamers for ace but not thick or sticky just a lite gel that the skin drinks in fast and then I put on my moisturizer after its dry and I good to go.
I've been using this product for a while now and it helps a lot with pimples, but I haven't seen it make a difference when it comes to my blackheads. It does a good job at attacking my larger pimples, but seems to have no affect on blackheads. That might have something to do with the rollerball though. Maybe if you took the rollerball out and applied it directly you would see different results? I hope that helps!
Try these two products, use the pore penetrator after a washing your face with warm water and follow instructions then remove the blackheads with the extractor, gently. After that try applying a cold damp clothe on your face to help close the pores. Do it weekly.