I prefer using gel liners as opposed to liquid or pencil ones. Gel liners, in general, apply smoothly and appear intense. With the right brush, you can apply like a pro with no trouble at all.
Standout Eyes Gel Liner Collection
The Sigma Beauty Standout Eyes Gel Liner Collection features an array of long-wearing, opaque and saturated colors. All gel liners are versatile, yet unique and unexpected with intense pigmentation and a smooth, fluid-like finish. Paraben-free.