The best Oatey Solder / Flux?

I picked up some Oatey Lead Free wire 95 Tin/5 Antimony. Is that the correct/best stuff? The coil on the outside is blue. I am doing 1/2 copper.

Is there a best solder/flux? I don't mind paying a bit extra as I don't use it often and figure it best to use.

And recommendations?

i am not a plumber, but i have had great success with using that. it's oatey 95 pre tinning flux. it's kind of pastey green. that being said, someone will come along shortly and tell you that you can be fined $2500 for doing your own plumbing because you are in Massachusetts.