We sell POLYCAST SAR super abrasion resistant acrylic roofs which are produced by applying a very hard. Highly CROSSLINKED polysilicate (a silicon polymer or POLYSILOXANE) coating to an acrylic substrate. This coating provides POLYCAST SAR sheet with a surface that has 45 times the abrasion resistance of uncoated acrylic. Making it an attractive material for applications requiring the safety. Optical and aesthetic qualities of acrylic along with a highly abrasion resistant surface.