I need envelpes for a couple of mass mailings. Just over 100 in the first mailing. Over half were stuck together and had to be torn apart. I had labeled and stamped them prior to stuffing. The self seal strip on the top was uneven. It apered from thickest on the left (about 3/8") to zero on the right on numerous envelopes. To utilize the 400 left I will stuff and seal first then lable and atamp! If they are to stuck together (they literly have to torn abart) at least now I can pitch them without having to runall new lables and losing the postage stamps.