A photograph displays three aluminum TIG welding rod packs—ER5356, ER4043, and ER1100—on a metal surface with rods partially exposed.

What Filler Rod for Cast Aluminum to Use for Strong Welds

Welding cast aluminum takes more than just the right machine—it starts with the right filler rod. Castings are often old, porous, or full of unknown alloys, and that makes choosing your filler metal a critical step. Whether you’re patching up a cracked rim or rebuilding a corroded bracket, using the wrong rod can lead to…