Dead Burnt Magnesia (short as DBM), which has been calcined at temperatures ranging from 1200ºC - 2000ºC of the natural Magnesium Carbonate(MgCO3) or CCM. As its name "Deadburnt", DBM exhibits high bulk density and hydration resistance, but low chemical reactivity.

It finds its use most popularly in the refractory application, I.E.: refractory bricks, monolithic gunning materials, in the production of tundish etc. It can be classified as Middle-grade DBM and High purity DBM.

Besides refractory application, DBM has also been widely applied in:

- Braking lining and pads

- Leather tanning

- Welding flux

- Foundry