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Handi-Foam E-84 Meets ASTM E-84 Specifications
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A Brief Review of Fire Rated Products
 Fomo manufactures numerous flame rated polyurethane products. A flame rated foam product passes fire test procedures developed by accredited organizations such as ASTM (American Society for Testing Materials) or UL (Underwriters Laboratories). Since polyurethane is an organic material and like other organic building materials, it will burn. Therefore, all of the appropriate test methods developed to rate PU foam consist of the application of an open flame to the PU sample, and the subsequent measurement of how far the flame spreads across the sample. Some of these tests require that the amount of combustion smoke generated be measured along with the flame spread. One especially difficult test, ASTM E-162, combines an open flame with a radiant heat source.
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Fire Rated Materials versus Fire Stop Materials
Fire Rated
Rigid polyurethane foam is an organic material like wood. All organic matter is combustible, and thus will burn in the event of fire. Combustible organic materials like PU foam can be rendered more resistant to burning through the addition of flame retardants, or, though alterations in their chemical makeup. such enhanced products are capable of passing accredited flammability tests from noted specifying bodies such as ASTM, UL, and DIN. Common examples of tests used to rate flame resistance are ASTM E-84, UL-94, and DIN B2. When a flame retarded material passes a specified flammability test, it is termed a fire rated product. In practical terms, a fire rated product aids in reducing the risk of flashover in a major fire by its diminished role on supporting combustion. However, being organic in nature, fire rated products are still combustible. Even the most flame retarded urethane foam will undergo combustion at temperatures exceeding 550C (1022F).
Fire Stop
Fire Stop materials on the other hand are typically blends of inorganic materials such as clays and earth metal salts which do not readily support combustion. They are usually available as caulks, or in putty form. To achieve a fire stop rating, a material must pass an accredited fire stop test from, typically, the same agencies mentioned above. Fire stop test such as ASTM E-814 involve severe, prolonged exposure to a furnace type of environment. The material must endure temperatures of >850 C (1562 F) for long periods of time, typically between 1 and 4 hours. The highly non-combustible nature of fire stop materials has led to their wide spread specification in local building codes.
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