Inspecta-Shield Fire Retardant is a versatile, broad spectrum, odorless, colorless, multi-use, penetrating, class "A" fire retardant for interior use only. This pre-mixed product is easy to use, non-toxic, non-allergenic, and offers superior fire-retardant protection. UL classified Inspecta-Shield assures a quality controlled, invisible fire retardant ideally suited for economical commercial treatments of natural fibers, synthetic fibers, wooden building materials and other wood products, upholstery, carpeting, draperies, decorative products, paper, displays, stage curtains, mattresses, and much more. It works by slowing horizontal and vertical flame spread. It does not prevent charring, but treated items will not support ignition.