Alumalloy

[Aerometalworker]

If the filler melts below 840F, and joins metal through bonding by capillary action, then it is soldering. If it melted above 840F, but below the melting point of the object being joined, then it would be called brazing. This stuff is solder.

I would not even call it that good! Its just zinc based "pot" metal. Real brazing and soldering materials are aluminum/silicon based, with some of the real solf solders having lead and tin as well. This stuff has no ductility, and in fact can cause the base metal to become brittle depending on the alloy.

[MR.57]

Zinc is brittle, Zinc also oxidizes easily (Think about it - what are sacrificial anodes made from?). Brittleness and corrosion susceptibility aren't desirable in any repair. It's a cruel joke on the consumer when they market this stuff as acceptable for repairing small aluminum boats.

If a piece is impossible to fix by welding or "real" brazing, I'd resort to epoxy before using that stuff.

[Aerometalworker]

Zinc is brittle, Zinc also oxidizes easily (Think about it - what are sacrificial anodes made from?). Brittleness and corrosion susceptibility aren't desirable in any repair. It's a cruel joke on the consumer when they market this stuff as acceptable for repairing small aluminum boats.

If a piece is impossible to fix by welding or "real" brazing, I'd resort to epoxy before using that stuff.

Actually we are going away from zinc, some of our anodes are aluminum alloy, some are now magnesium.