
The sealant was initially tested on four backsheet material types: one based on co-extruded polyamide; a product made of polyvinyl fluoride (PVF). . The flowable sealant was then tested on solar modules based on an AAA backsheetthat were damaged by deep longitudinal cracks and have operated for around seven years. The sealant was used to fill the cracks, and. . The researchers also decided to test the repair technique at an existing solar plant located in southern Germany “The silicone was applied from a cartridge and then distributed and [smoothed].