Taped off the bubble and the flashing and installed white Sikaflex auto sealant adhesive. Clecoed everything in position and squeegeed the sealant off. Riveted the canopy on using washers on the inside. Dressed the sealant with some alcohol to smoothen it and removed the masking.
The thin white line seen between the bubble and the flashing is a 1.5 mm border of Sikaflex 227
This border was achieved by masking 1.5 mm away from the flashing and allowin the sealant to ooze out