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OnlineLabels.com offers wafer seals for envelopes, invitations, boxes, products, and packaging in a variety of colors and materials. Our mailing seals come in several styles including perforated, non-perforated, and a variety of unique shapes. In addition to our standard white matte, we also offer printable envelope seals in clear, gold and silver foil, waterproof labels, and more.Popular uses for envelope seals:
A self-mailer is a series of unbound sheets folded to make panels. It must be sealed to prevent opening in the USPS mail sorters or during transit.
Tabs (wafer seals) are one of the most common ways to seal your mailer, followed by glue.
Tabs can be made of paper, vinyl, or plastic. OnlineLabels.com sells wafer seals in all three materials.
Paper wafer seal materials
Vinyl wafer seal materials
Plastic wafer seal materials
The number and size of tabs depends on your mailer’s weight and design.
Tabs should be placed at least 1 inch away from the edges but should not overlap or otherwise interfere with the postage.
As of 2009, perforated wafer seals are no longer allowed to seal self-mailers.