HELP** best CaulkFor painting windows

I am painting my exterior wood windows. Before I paint I need to re caulk the seams around the trim and between the sill and the sill nose. What is the best type of caulk for this application. Should I seal before I paint or should I seal after the primer coat and before the final coat. Any recommendations welcome. Thanks!!
John
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A high quality latex with silicone caulk will do the job. At Lowes it is called trim and window caulk. 35 years or so the label claims. I won't be around to verify whether it lasted that long or not..
I usually caulk after I prime because it is easier to see. Your responses on this one will be about 50/50.
Colbyt
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