Many aluminum alloys can be brazed. The part to be welded must be preheated before welding and allowed to cool very slowly, otherwise the repair will just crack out again or worse, shatter.

However, there are also a few AlMg casting alloys. Due to the thickness of the aluminum, we recommend using oxy-acetylene and a size 3 or 4 tip.

Though it is often called a liquid, it comes as a paste. We made new cylinders from the cast blanks. For the repair of this cracked engine block, we used Belzona 1111 (Super Metal), Belzona 9111 (Cleaner/Degreaser), Belzona 9341 (Reinforcement Tape), and a few tools from our machine shop. 100g EPOXY ALUMINIUM PASTE FOR FIXING CRACKS IN METAL PARTS ENGINE BLOCKS HEADS BROKEN THREADS The packaging include a piece of reinforsement mesh and two plastic spoons SPECIAL TECHNICAL EPOXY - HIGH QUALITY PRODUCT possesses the highest adhesion to all hard materials: metals and their alloys and casts as well glass, wood and stone. Cracked cast aluminum bell housing from a vintage Alfa Romeo.

Brazing stronger than welding with over 50,000 satisfied customers lifetime expert tech support and a 60 day money back guarantee. Save your valuable serial numbers. Every day, around the world, someone in an industry like yours relies on our specialist cold repair techniques for cracked or broken components made of cast iron, steel or aluminium.

Spray the degreased cracked aluminum part with the 50/50 mixture to remove the degreaser residue from the surface of the part.

Checkout videos of Aluminum Crack Repair, Hole Repair, Thread Repair and Aluminum Ear Repair.

Characterized by … I clean metal with say wire wheel.

Why? Is it possible to drill a hole … When you need to get a business-critical plant working again as soon as possible, and only a cold repair will do, you can count on the proven Metalock process. You can actually use Aluminum braze to repair cracks, holes, leaks, rivets, broken ears, threads or fabricate aluminum, cast aluminum, and cast iron quickly, easily, and stronger than new. This is the smart way to repair a die-cast piece if chrome plating is involved. Breakages usually occur because of overloading, accidents, equipment misuse or flaws in the casting. I thought I would try some epoxy and see how well it holds up. Welding cast iron takes serious skill, tools and long-forgotten techniques. The aluminum itself can also be used to replace a part of another metal that might have cracked or fallen off. After the surface was thoroughly cleaned, and the cracks were terminated by drilling and tapping small holes at their ends. We digitized an identical ZL1 block.