Profile: R F R Industries, Inc. designs and develops flangeway fillers. We deliver flange insert systems and rail seal systems. Our flange insert system features a pop-down gauge insert, which is used with full-depth concrete panels or timber planks. Our rail seal system is used with poured-in-place asphalt or concrete and fits 115 lb to 136 lb RE rail sections. Our flange way/rail sealants are anchor-adaptable, accommodate concrete- or timber-tie rail fasteners.