types of solder to use on aluminum radiator for Dummies
..like crevices, normal plumbing flux and even though I've experienced luck with most solders, 4% silver bearing solder is much better In the end...kinda high-priced tho... I had Harris solder on hand at the time so no huge offer for me but costly if you do not need to have the energy for off street/ vibration/ continual beatings etc.Aluminum flux: