Do liquid-and-powder products have expiration dates? Also, is there a deadline to use a product that has already been opened?
All artificial nail enhancement products have expiration dates, but how long these products will last often depends on their storage conditions. Products kept in temperatures exceeding 85°F will have shortened shelf-lives, and storing them in areas exceeding 100°F can cause them to rapidly thicken and harden in the container. In general, I recommend that nail professionals not purchase more than a three-month supply of any nail enhancement product, including wraps, adhesives, and UV gels. Discoloration, cracking and lifting of the artificial nail can all be indications that a product’s shelf-life may have been exceeded. — Doug Schoon is CND’s vice president of science and technology.