5 Sheets - 1/4" Clear Cell Cast Acrylic Plexiglass Sheet 12" x 12" 1/4" Clear Paper Masked Cast Acrylic/Plexiglass sheet 12" x 12" Clear, colorless cast acrylic plexiglass sheet has a luminous transmittance of 92%. It is clearer than glass and will not yellow under normal UV or sun exposure. Cast acrylic plexiglass sheet will withstand exposure to blazing sun, extreme cold, sudden temperature changes, salt water spray, etc. Cast acrylic plexiglass sheet is light, having only half the weight of glass and 43% the weight of aluminum.