Silver Soldering

[f350ca]

I'm not an expert at silver soldering, sometimes get good results, usually messy. The silver solder I had, (used the last soldering cast iron sleeves into steel pipe for the tool grinder) seamed to act more like brazing rod, real high melting point and poor flow(would wet the surface but not wick into a gap), even when I had things clean and used the white flux I have.
Anyway need more material, is this what I should be getting?
solder