The present disclosure relates to a method of applying a seal material on a glass sheet surface of one or more tempered glass sheets for a vacuum insulated glass unit. The method comprises the steps of: obtaining by means of a sensor system (4) surface variation data of at least one tempered glass sheet (3, 30) for said a vacuum insulated glass (VIG) unit, and applying seal material (2) for an edge seal at a surface (3a, 30a) of said one or more tempered glass sheet (3, 30) by means of one or more nozzles (5) having a nozzle opening (6) for dispensing said seal material. The method further comprises by means of a control system (7) controlling one or more adjustment systems (9, 10, 11) influencing on the applying of said seal material by said one or more nozzles (5) based on said obtained surface variation data. The disclosure additionally relates to a method of manufacturing a vacuum insulated glass (VIG) unit, and a system for applying edge sealing material (2) for an edge sealing of a vacuum insulated glass unit (1, 100) and use of a system for applying edge sealing material (2) for an edge sealing of a vacuum insulated glass unit (1, 100).