210 - Aluminum Macro-Etch Solution 250ml

See What's Inside Your Aluminum Welds

You can't fix what you can't see. When it comes to aluminum welding, surface appearance can be deceiving. A weld might look like a stack of dimes on the outside but lack fusion or penetration on the inside. The 210 Caustic Etch Solution is your truth-teller. Designed specifically for aluminum, this 250ml bottle of etching fluid allows you to perform macro-etch tests right in your shop, giving you immediate feedback on your machine settings and technique.

How It Works: After cutting and polishing a cross-section of your weld, simply apply this solution. The chemical reacts with the aluminum, turning the polished surface into a detailed map of the metal's structure. Within moments, the weld nugget, the penetration profile, and the heat-affected zone pop out in high contrast. It’s the standard method for testing TIG and MIG aluminum welds for certification or procedure testing. No expensive microscope is usually needed for a macro-check—the naked eye or a simple magnifying glass is enough to spot lack of fusion or porosity once the etchant does its job.

Essential for Serious Fabricators: If you are building critical aluminum components—like fuel tanks, boat hulls, or structural frames—you need to know your welds are sound. This etchant is a cost-effective way to validate your work. It comes in a manageable 250ml size, which goes a long way since you only need a small amount per test. Keep a bottle in your QC cabinet and take the guesswork out of your aluminum fabrication.

Why Use Etchant?

• Verify Penetration: Ensure your root pass is digging deep enough.
• Spot Defects: Reveal hidden porosity and lack of fusion that X-rays might miss or are too expensive to check.
• Refine Settings: Dial in your voltage and wire speed by seeing the actual result of your arc.
• Pass Tests: Essential for preparing coupons for CWB or AWS certification tests.