During the manufacture of sign banners, it is sometimes necessary to create a double thickness or seam for adding strength to the finished banner. Traditional methods involve the use of certain glues and compounds; this can make the task sometimes very messy and also potentially hazardous because of the chemicals involved. Piranha banner welding machines are capable of doing the job quickly and cleanly without the use and further expense of glue.

The whole process is transformed from a time consuming chore into a quick and easy task. The machines can be utilised in welding other types of soft plastics that would normally be impossible without great expense.