The word resealing is playable in Words With Friends™, no blanks required. Because it is longer than 7 letters, you would have to play off an existing word or do it in several moves.
Words With Friends™ Letter Score: 13
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (27 words)
aligner, anglers, enlarge, enrages, erasing, gainers, general, genials, girnels, gleaner, greisen, leaners, learing, leasing, leering, lineage, lingers, nailers, realign, realise, reeling, regains, relines, renails, sealing, searing, slinger