Zamak 2 has the same composition as zamak 3 with the addition of 3% copper in order to increase strength by 20%. Zamak 2 has the greatest strength out of all the zamak alloys. Over time it retains its strength and hardness better than the other alloys; however, it becomes more brittle, shrinks, and less elastic.

Zamak 2 is also known as Kirksite when gravity cast for use as a die. It was originally designed for low volume sheet metal dies. It later gained popularity for making short run injection molding dies. It is also less commonly used for non-sparking tools and mandrels for metal spinning.

This alloy exhibits excellent damping capacity and vibration attenuation in comparison with aluminum die casting alloys. High strength and hardness levels after long-term aging.