Electronics > Repair
I*really* want to remove Kester 44 flux - what do I need to buy?
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cvanc:
I know you don't have to remove it but I just hate looking at it if nothing else. Plus it gets in the way of rework.

What will get this off nice and clean? I'm constrained for the need for 'hobbyist quantity' and don't want a gallon can of anything. Thanks...
Kim Christensen:
I use a sharpened chop-stick to scrape/pick the bigger chunks off. Then I use 99% isopropyl alcohol with a brush and scrub/wash/flush the rest away. I'll also use a paper towel to soak up any now dirty alcohol while tilting the PCB so it runs toward the towel pressed against the PCB. This minimizes the cleaning area if the PCB already has large clean areas.
GLouie:
I think I've found pure ethanol ("Everclear" sold at USA liquor stores) a bit better than the 91% isopropyl I can get from the drugstore at removing Kester 44. I'll hold the board vertically over a little tray of alcohol and dip a toothbrush in it and scrub the board a bit. However, I think the alcohol gets contaminated immediately, so when it dries it leaves still some flux residue. Then I'll dribble some fresh alcohol over the board with a fresh toothbrush a couple of times. Then some spot cleaning with an alcohol soaked rag and cotton buds. It's still never perfect, but it's cheap.
jpanhalt:
Use ZEP Heavy Duty Acrylic Floor Sflripper diluted one part to 3 parts total with water and an ultrasonic for about 1 minute.
nctnico:
I've found ethanol works better as flux remover compared to alcohol for cleaning up small bits of rework. But using real flux remover works even better but that stuff is in my shed for cleaning entire boards.
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