Beijing MUCHEN manufactures the Fireal passive fire protection range alongside the CORROSTOP heavy-duty anticorrosion range. Its intumescent fire-resistive coating is UL Listed under file R39397 in category CDWZ, assessed to ANSI/UL 263 and ANSI/UL 1709, with a matching Canadian listing under CDWZ7, and its topcoat is component-listed separately under XKXC2.R40811. A second UL file, R41219 in category XHHW, covers fill, void and cavity firestop materials to ANSI/UL 1479 and UL 2079. Holding UL files in both structural fire protection and firestopping categories is rare among Chinese manufacturers.