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There are basically two types of fire retardant - intumescents and non-intumescents. Here's the simple explanation. Intumescents swell up when exposed to heat. Non-intumescents don't.More complex explanation.When exposed to flame or heat above around 325°F, intumescent coatings swell up and form a thick layer of char. The heat causes a chemical reaction that generates gas that fills tiny little pockets in the coating - almost like foam. That foam insulates and protects the substrate from th …

Welcome to the new website for RDR Technologies! We have completely redesigned our site and shopping cart, trying to make finding the products you need much easier. If you are needing to buy fire retardant spray, RDR represents more than a dozen fire retardant manufacturers from around the country, and our purpose is to get your project up to code with as few headaches as possible. We invite you to give us a call with any questions. Rather than trying to sell you a particular line of products th …