Effective by penetrating into the raw, porous substrate to inhibit the ignition of the substrate, these water-based, non-durable (will wash out) liquids will dry clear. The products for fabrics will make the fabrics passable for NFPA 701. Save your FR chemical container (or at least the label), to show your Fire Marshal if requested. And, if possible, treat an extra sample piece the same way as your original.
NOTE: Longevity of any FR additive depends on the use of the treated fabric (and how much it is handled) and the environment (mostly humidity and environmental changes) in which the treated fabric lives. It also depends on whether the treated fabric is clean or has been accumulating dust (stage dust, shop dust) and/or air-borne oil particles (from a restaurant or cafeteria kitchen).
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