Mix the sealant per the procedure and list down the data as mentioned in Assembly process sheet(APS).
Apply the faying surface  seal  (BMS 5-45 class  B2) to the nut plates. Apply sealant to the blind rivet as per the instruction in the APS so as to achieve the required squeeze out.
Perform the rivet squeezing as per  the APS. Ensure the flushness after the squeezing.