Racing Shield Polycarbonate windshields - Supercoat

90-05 Miata

Windshield will save about 1llbs over the OEM safety glass windshield. NASA and SCCA require 3/16" (.187) minimum thickness.

Supercoat is standard and will resist scratching from windshield wipers. Supercoat will also repel water better than over the counter additives such as Rain-X.

Optional Anti-Fog for cars that will be run in the rain without a heater.

Full DIY installation. No instructions or hardware. It's up to you to mount it.

Optional rear window is for hard top, not soft top.

Polycarbonate expands greatly with heat so mounts must allow for that.

Coefficient of Thermal Expansion ASTMD696 in/in/F° 3.75x 10-5

Cleaning Supercoat

Windex, Fantastick, Mr. Clean, Formula 409, isopropyl alcohol all work well.

Cleaning Anti-Fog (inside only)

Soap and water only. Cloth, sponge or chamois. DO NOT use paper towels on inside of Anti-Fog coating

Best drying is with a chamois. Avoid abrasive cleaners, tools or materials.

Drilling

Can be drilled using a standard metal drill bit – without making any modifications.  For 1/4" diameter bits (or less), 1800 rpm is recommended; for larger bits, use 1000 rpm.  Avoid drilling too quickly reducing heat build-up and stress.

Fasteners

If you are using fasteners requiring holes in your windshield – slightly oversize your hole & add a small amount of RTV silicone or other grommet to absorb expansion & contraction energies.  Countersinking and riveting will result in spider cracks around the hole.