Protecting Port Sensors During PCBA Wash

[KJeffriesTriad]

Need advice on proven methods to protect a sensor port (BMP384) during PCBA wash with chemistry.  The rest of the PCBA must be completely free of flux for eventual potting/encapsulation or we would process everything no-clean.  We have tried kapton over the port, with a water proof peelable mask over the entire sensor.  Once cured, wash then peel the mask.  This only works marginally.  We have several sensors with damaged gel.  Thanks in advance.