I used Prima Hydro in the summer. It easy to use because it's wax as you dry. The beading does not last as long as Black Magic's beading does. But if you use it everytime you wash, it shouldnt really matter how long it lasts. The beading lasts about 3 weeks for me in Boston summer. The beading for black magic lasts about 1.5 months during the 3 major snow storms we had in Boston.