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The Blue Demon ER5356 aluminum TIG rod is an aluminum-magnesium filler (AWS A5.10) for welding 5000-series aluminum, and it is a common choice for 6061 as well. It has higher strength than ER4043 and good resistance to salt water, which is why boat builders and trailer fabricators use it. Weld it with AC on your TIG machine and argon gas, not with DC. Avoid it for parts that run hot all the time, because high-magnesium aluminum can crack from stress corrosion above roughly 150 degrees F.
Blue Demon ER5356 at a Glance
| Item | Detail |
|---|---|
| Brand | Blue Demon |
| Classification | ER5356 aluminum filler (AWS A5.10) |
| Listed size | 1/8 in diameter, 10 lb box, about 36 in rods (confirm diameter and pack on the listing) |
| Process | TIG / GTAW |
| Current | AC with argon shielding gas |
| Best for | 5000-series aluminum, marine and trailer work, many 6061 jobs |
ER5356 vs ER4043
- ER5356: higher strength, better corrosion resistance in salt water, and a better color match if the part will be anodized.
- ER4043: flows more easily and is more crack resistant on some joints, but it is weaker and turns dark when anodized.
Check the base alloy and the service temperature before you choose. For parts that stay hot, a different filler is safer.
How to Weld Aluminum with ER5356
- Remove the oxide layer with a stainless brush used only on aluminum, then wipe with acetone.
- Set the machine to AC with argon, and use a tungsten recommended for your machine.
- Pick a rod diameter that suits the thickness. A 1/8 in rod suits heavier sections and needs enough amperage to melt it.
- Keep the rod end inside the gas shield and add filler in small dips.
- Preheat thick parts lightly, since aluminum pulls heat away quickly.
- Store rods clean and dry. Dirty or damp rod causes porosity.
Pros and Limitations
Pros
- Strong filler for 5000-series aluminum
- Good resistance to salt water, per the listing
- Better anodizing color match than ER4043
Limitations
- Not recommended for sustained high-temperature service
- Needs an AC-capable TIG machine and clean aluminum
- Stiffer than ER4043, so it can be harder to feed on thin sections
Who Should Buy It
Buy it if you TIG weld boat, trailer, or structural aluminum and need strength and corrosion resistance. If you mostly weld thin 6061 or want easier flow, compare ER4043 as well.
Related guides: aluminum welding rods compared, 3/32 ER4043 aluminum TIG rod review, ARCCAPTAIN aluminum TIG rod review, aluminum TIG welding rods review.
Frequently Asked Questions
What is Blue Demon ER5356 used for?
It is used for TIG welding 5000-series aluminum and many 6061 parts, especially marine, trailer, and fabricated structures that need strength and corrosion resistance.
Does ER5356 TIG rod use AC or DC?
Aluminum TIG welding normally uses AC with argon. DC electrode negative does not break up the oxide layer well enough for aluminum.
Is ER5356 stronger than ER4043?
Yes, ER5356 generally gives higher strength, but ER4043 flows more easily and resists cracking on some joints.
Can I use ER5356 for anodized parts?
It matches anodized color better than ER4043, which turns dark. Test a scrap piece before welding a finished part.
How should I store aluminum TIG rod?
Keep it in its tube or box in a dry place and wipe it clean before use. Moisture and dirt on the rod cause porosity.
Final Thoughts
The Blue Demon ER5356 rod is a strong, corrosion-resistant filler for aluminum TIG work. Confirm the rod diameter and pack size on the listing, use AC with argon, and keep the aluminum and the rod clean.
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