You have to know how much moisture is needed to get the flap to stick.
on February 12, 2020
Posted by: Deb
Verified Purchase:Yes
The 9x12" gummed catalog envelopes work just fine. As far as the gummed part you have to know how much moisture is needed to get the flap to stick. I have always use a piece of tape on any catalog envelope be it gummed or self seal. I do it to insure that it arrives safe to our clients.
These have just the right weight that I need but I would prefer it if the gum on the flap went all the way across the flap. There is a space in the center about an inch wide where there is no gum which can allow the flap to be torn during transit. The price differential between these and the peel-n-stick version makes this the more attractive option but I would really like to be able to moisten and seal the entire flap.