By Real Simple
Updated March 17, 2009
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John Frieda Weather Works Weather-Proofing Style Sealant Creme
Credit: Boyle & Gardner

John Frieda Weather Works Weather-Proofing Style Sealant Creme

Testers found that this silky-feeling serum offered “the longest-lasting results” of any they tried. It contains a specially formulated silicone to seal out hair-frazzling humidity and rain.

To buy: $6, at drugstores.