An example of a wax seal found on one of the Sutro Library's indentures. The red wax seal, embossed with the barrister's or maker's signet ring, is typical of the appearance of seals.The maker's signature completes the document. Step 1 : Insert 2 sticks of sealing wax into a low-temperature full size glue gun. You will need one stick to push out the other. Sealed in plastic on cardboard ; Time Period Manufactured. Indenture just meant contract. I was wondering whether or not it's advisable to mail a letter with a wax seal? The seals seem sturdy to me, but I haven't tried mailing one yet. Find the perfect indenture document stock photo, image, vector, illustration or 360 image.