madison reed touch up powder

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Powder

These adhere without stickiness, so your hair won't look flat or greasy.

Hair type: Fine

Madison Reed Root Touch Up Powder, $30; Madison-Reed.com
TouchBack Pro liquid color pen

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Markers

Liquid color pens are precise (perfect for patchy grays) with a weightless finish.

Hair type: Fine, Normal or Thick

TouchBack Pro, $25; TouchBackGray.com
hair mascara

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Hair Mascara

The swipe-it-only-where-you-want-it applicator won't tint your scalp the way a spray can.

Hair type: Fine

Cover Your Gray 2-in-1, $7; CoverYourGray.com
bumble and bumble bb color stick

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Stick

The waxy consistency works well with thick, dry hair, which can handle a product with a heavier texture. A PSA brought to you by every expert interviewed for this story: If you're using a stick root concealer, do a deep clean before your next color session. These products can leave behind a waxy residue that prevents dye from penetrating the hair shaft, and regular shampoo (especially the gentle stuff for color-treated hair) won't remove the buildup. The day before you hit the salon or color at home, suds up with a clarifying shampoo, suggests Sharon Dorram, owner of Sharon Dorram Color at Sally Hershberger in New York City.

Hair type: Coarse

Bumble and Bumble Bb. Color Stick, $26; BumbleAndBumble.com
rita hazan root concealer spray

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Spray

The biggest benefit here: You can cover large areas with one continuous mist.

Hair type: Coarse, Normal or Thick

Rita Hazan Root Concealer Touch-Up Spray, $25; Sephora.com