Therefore, manufacturers add various flame retardants to impart flame retardancy to a plastic. Additive vs Reactive Flame Retardants There are several chemical classes of flame retardantsCustom with polymers Perfect Steerable Transfer Cartluding Brominates FR's, Organo Phosphorus FR's, Melamine-based FR's, Metal Hydroxide FR's, etc. Apart from these chemical classes, there are other flame retardants that can be Perfect Steerable Transfer Cartorporated into a