The US has maintained antidumping duty orders on cast acrylic sheet from certain countries. Importers should review the current scope of active orders at the Commerce Department's Enforcement and Compliance portal and confirm whether their specific product — by manufacturing method (cast vs. extruded), thickness, and country of origin — falls within scope. A scope ruling request can provide binding guidance when coverage is ambiguous.

Cast acrylic sheet is produced by polymerizing liquid monomer in molds, yielding superior optical clarity and surface quality; extruded sheet is produced by forcing molten polymer through a die, offering tighter thickness tolerances and lower cost. Both forms are classified within this heading, but AD duty orders have historically targeted cast sheet specifically — so the manufacturing method is a critical procurement and compliance data point.