Shurtape FP-202 Premium Grade Bleached Flatback Packaging Tape is used for splicing and hand and machine carton sealing applications as well as in general purpose applications when a thick paper backing is necessary. Constructed of a heavy duty kraft flatback paper coated with a high tack rubber-based adhesive with excellent quick stick properties. Shurtape FP 202 resists abrasion, water, solvents and oil. When it is used as a carton sealing tape, meets or exceeds requirements for motor freight, railway, air express, air freight, postal shipments and government packaging. Shurtape doesn't call out any USPS specifications specifically on any of their paper carton sealing tapes; however FP-202 does meet the ASTM D5486M specification for PSA box sealing/closures.
If your order will not be for a full case and you require certificate of conformance documentation to ship with your order please see our policy at http://www.findtape.com/customer/help.aspx#p4
so that the proper request (and charge) can be made at the time the order is placed.