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J.D. Russell

Fiber Expansion Board (3",3.5",4",6")

Composed of cellular fibres, bonded together with asphalt.  When compressed to 1/2 of its original thickness, it will recover to a minimum of 70% of its original thickness.  It is versatile, resilient, flexible & non-extruding.  Available in 2", 3", 3.5", 4", 6" x 10' and 4' x 10' sheets.