Diamond Colloid is an experimental substance developed to increase resistance to conventional and unconventional weaponry used in the Koprulu Sector. It was discovered while researching ways to reproduce Protoss crystal technology. During experiments the colloid proved to be resistant to most forms of chemical reactions after being coated on different alloys of Neosteel. When applied to bunkers and subjected to Zerg attack, all signs of infection were halted the instant they came into contact with the colloid. Even oxidizing agents that can rust heavy Neosteel plating was found to be ineffective against a light coating of Diamond colloid (Transformers: Corrostop).