Smashbox Photo Finish Primer (£28), was quite possibly the first makeup primer, ever — and was created with the purpose of helping makeup last longer on set. With a clear, gel texture, it's nondrying and gives the skin a smooth finish, thanks to the fact it includes silicone, a key ingredient in many of traditional primer formulas. "Silicone helps to fill in the gaps in the surface of your skin, helping your skin to feel smoother," says Dr Fabusiwa. It also helps create a blurred effect on top of the skin (hence why this formula is labelled as "The Original Smooth and Blur") which softens the appearance of pores.
The fact this classic formula truly locks makeup in place, blurs pores, and is oil-free makes it great not just for people with oilier complexions but all skin types.