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    Sally Hansen Mega Strength Hardener

    Sally Hansen's affordable Mega Strength Hardener is an Allure Best of Beauty winner for a reason: This transparent and shiny base coast formula dries in seconds, looks great on its own or underneath another polish, and its wide, flat brush makes application a breeze. Not to mention its hardening effect is immediately noticeable on brittle, break-prone nails.

    $6 (Shop Now)

    The Best Nail Strengthening Treatments for Brittle Nails

    We asked some of the industry's most coveted nail artists for their best picks.

    Originally Appeared on Allure