Alumilite urethanes are non - toxic and virtually odorless. First of all, we recommend you read any and all SDS (Safety Data Sheets) and warning labels on any product that you use. All urethanes contain some type of Isocyanate. We have a very small, diluted amount of MDI Isocyanate, which was deregulated as hazardous and is not considered to be a hazardous material. Alumilite resins do not contain mercury. Alumilite is not recommended for children under the age of 13 without adult supervision. If you have questions about safety and suitability of our products, contact Alumilite directly at 269-488-4000.