The mini flat brush works great with liquid concealer because of its density and the angle on one side of the brush. The angled flat top gives overall, even coverage and perfect colour transfer. The small head makes it easy to cover areas which are hard to reach.
One side flat bristles make it erogonomically easy to apply and blend cream products on the face specially in smaller and hard to reach areas like around the nose, corner of the eyes.
Use a sweeping motion to apply product. Use a dabbing motion to build coverage and blend product.