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Polycarbonate Panel 4mm Clear

4mm Clear Twin Wall Polycarbonate: R-value 1.47, U factor 0.680, 85% light transmission. Solar heat gain co-efficient 0.83

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  • R-Value 1.7 compared to an R-value of 0.85 for six mil polyethylene
  • 83% transparency
  • 10-year warranty against UV degradation
  • up to 83% diffused light (only product on the market with both high transparency and high diffusion)
  • 120 lbs per square foot snow load rating (approx 15 feet of snow)
  • 100 mph wind rating (has survived 135 mph windstorms in Alaska)
  • Full UV Degradation warranty of 10 years (better warranty than polycarbonate)
  • It does not turn yellow or get brittle
  • Flexible so it can be rolled up inside wall curtains


This item must be crated for shipping—crating charge will apply.

Polycarbonate must be shipped via motor freight.

Note: R-Value - the measurement of the material's insulating ability. The higher the R-Value number,r the more significant the insulation value.
U-Value - the measurement of 'heat loss' through the material. The lower the U-Valu,e the less heat is escaping.

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