G 550 Amorphus silica 7631-86-9 Millennium Chemicals Scratch/ Srcub/ Mar resistance agent Surface conditioner, miscellaneous >> Matting agent >> Amorphous silica Coatings >> UV / Radiation Curing Coil Coating Wood & Furniture Coatings Amorphus silica. Shows excellent matting and mar characteristics. Used in architecture, coil, wood, radiation cure coatings and overprint varnishes. Amorphus silica. Shows excellent matting and mar characteristics. Used in architecture, coil, wood, radiation cure coatings and overprint varnishes.