Can roller banner stands be joined together to form a seemless back drop, joined yes, seemless no.
This 850mm wide pull up banner can lock together at the base with a special magnetic end and links the tops with a removable connector.
There is still a small gap between each unit, the fact is that the graphic banner needs to be smaller than the body of the roller banner housing it to keep it protected.
As you can see the gap will be small but you will have clear space running up your graphics design and this should be allowed for when the art work is being created.