CAUTION: This material may contain naturally occurring metal particles that may interfere with track operations and electrical systems. The supplier recommends adhering it with matte medium, and when dry, passing a strong magnet closely over applied area to pick up any metallic particles.WARNING: This product can expose you to chemicals including Silicate, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov