One trick you could use if you only print in PLA is to run some ABS or even better ColorFabb XT through the extruder.
Its melting point is higher enough that it can be used to seal the leak.
One trick you could use if you only print in PLA is to run some ABS or even better ColorFabb XT through the extruder.
Its melting point is higher enough that it can be used to seal the leak.