According to the findings of the Federal Institute for Risk Assesment (BfR), nano particles are not the cause of the health disorders, in some cases severe, which occurred after using so-called sealing sprays. Based on the information from manufacturers and chemical studies commissioned by BfR, the products do not contain any nano-sized particles. The term "nano" in the product names is intended far more to draw attention to the wafer-thin film that forms on the surface of glass or ceramic after the spray-application of the products. More than 110 incidents of, in some cases severe, health disorders were notified to the poison control and treatment centres and BfR at the end of March 2006 after consumers had used the products Magic-Nano-Glasversiegeler (glass sealer) and Magic-Nano-Keramikversiegeler (ceramic sealer) in spray cans with a propellant. Initially it was thought that nano particles were involved in the intoxications.