Boy, I must be behind the times... I don't guess I know what make-up primer is!!! Is this used with mineral makeup???? I don't use it because I don't feel like it would stay on my skin, and because it is messy to use loose powder. Easy for it to get on your clothing, etc... when using it.
Here is what I do.
First, I make sure to use a foundation that is completely non-oily and oil free. (non of the 'moisurizing' or ones are supposed to leave a 'dewey' finish) And, when heading out in the Summer, what I do is mix it with some BullFrog sunblock in my fingertips before applying. Bullfrog is ultra water/sweat/run resistant. It is not a sticky lotion, it is a quick-drying spray gel. When I do this, I know my face is set for the day!
BullFrog is also recommended for men whose hair is getting thin... the exposed scalp when parting hair for braids or ponytails..... the stuff works!