Sold in 10-packs of one pound spools, .035" Blue Demon ER4043 is one of the oldest and most widely used aluminum welding and brazing alloys.
ER4043 contains silicon additives which provide improved fluidity (wetting action) of the weld pool while also producing a weld that is less sensitive to cracking.
A popular choice for welders due to its bright weld finish, .035" ER 4043 can be used to weld a variety of aluminum grades.
Typical Applications:
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