The Press N' Seal can be resealed but it is more likely to be ripped open and tossed...I did some testing (although not scientific in the least) this evening with it...I sealed a book of paper matches and ran it under the faucet then submerged it on the bottom of a bucket of water for about a half an hour...upon opening the book of matches were as dry as dust !!! The wrap is heavier than regular kitchen plastic wrap and does not cling to itself as much, which makes it very easy to work with...I have put together several "micro" kits or modules with it and it is working out great....it keeps the contents tight (almost like a vacuum pack without the vacuum). Hey for $2.50 for a 25 yard roll its worth trying.

Dan-e-boy