Mully Brush 42 Flat Eyeliner Makeup Brush

Precision eyeliner with a short, flat square brush head

The Mully Brush 42 Flat Eyeliner is an eyeliner-specific brush defined by its short, flat, square-shaped bristles. The firm synthetic bristles deliver even color payoff from start to finish, and give you steady, precise control when filling in between lashes or drawing ultra-fine lines.

From eyeliner to extended crease definition

Load the brush tip with gel eyeliner or a deep shadow, then connect the dots along your lash line to create a natural tightline effect. Turn the brush on its edge to use the flat side, and you can extend the line from where your crease ends outward, building eye definition that's both sharp and soft.

Short handle design optimized for detailed work

With a 6.5 mm bristle width, 5 mm bristle length, and 142 mm total length, this compact brush lets you apply controlled pressure at your fingertips for meticulous detail. The natural wood short handle sits securely in your hand, while the aluminum ferrule keeps it lightweight yet durable. After washing, reshape the bristles and hang upside down to dry in a well-ventilated area.

For lining between the lashes

Use after completing your base makeup and eyeshadow, at the eyeliner stage. The short, flat, square-shaped bristles precisely fill in the spaces between lashes, creating a more natural line than pencil or liquid liner.

Lay the brush flat and dot along the lash line

Pick up gel eyeliner or a dark eyeshadow with the tip of the brush, then fill in the lash line by connecting small dots. To extend the tail, hold the brush upright and use the edge to draw a fine line. Gently taper off at the end of your crease for a defined yet soft eye look.

Wash weekly to maintain color payoff

Dilute a brush cleanser or gentle shampoo in lukewarm water and gently swirl the bristles to clean. Shake off excess water, reshape the brush head, and hang upside down to dry. Avoid direct sunlight and dry in a well-ventilated area to prevent bristle damage.

Works beautifully with gel liner and dark shadow

The firm synthetic bristles pick up and deposit gel eyeliner or matte dark shadow evenly for seamless adherence. You can also dip the brush into liquid liner, or layer shadow over pencil liner for a soft, smudged effect.

Keep the brush head protected

The 142 mm short handle fits easily into pouches, but the bristles can get pressed out of shape—store it in a brush cap or case. If the bristles start to fray or lose their spring, precise lining becomes difficult, so consider replacing the brush.

Product ingredients list.

The list of ingredients is subject to change. Please consult the packaging of the product purchased.