Zerust® offers VCI Diffusers (also known as VCI emitters) that provide targeted corrosion protection in hard-to-reach enclosed spaces or can be used as added protection to Zerust® VCI packaging products. VCI Diffusers emit powerful Zerust® corrosion inhibiting molecules into an enclosure that settle on metal surfaces and protect them from corrosion. They are safe for electronics, odorless*, non-toxic*, residue-free, and are designed to work in restricted spaces.