Double Glazing Units - g-value guide

g-value Colour/tint Product (6mm panes)
0.18 Clear/Neutral  Pilkington Suncool™ 30/16
0.20 - 0.28 ** Blue  Pilkington Activ SunShade™ Blue
0.21 Clear/Neutral  Pilkington Suncool™ One 30/21
0.23 Clear/Neutral  Pilkington Suncool™ 40/22
0.27 Clear/Neutral  Pilkington Suncool™ 50/25
0.28 Clear/Neutral  Pilkington Suncool™ 50/25 OW
0.28 Blue  Pilkington Suncool™ Blue 50/27
0.29 - 0.35 * Blue  Pilkington Arctic Blue™
0.31 Silver   Pilkington Suncool™ Silver 50/30
0.31 - 0.41 * Grey  Pilkington Optifloat™ Grey  
0.32 Clear/Neutral  Pilkington Suncool™ 60/31
0.32 - 0.43 * Bronze  Pilkington Optifloat™ Bronze
0.32 - 0.47 ** Clear/Neutral  Pilkington Activ SunShade™ Neutral
0.33 - 0.45 ** Blue  Pilkington Activ™ Blue
0.36 - 0.43 * Green  Pilkington Optifloat™ Green
0.36 - 0.53 ** Bronze  Pilkington Activ™ Bronze
0.36 Clear/Neutral  Pilkington Suncool™ 66/33
0.37 Clear/Neutral  Pilkington Suncool™ 66/33 OW
0.37 Clear/Neutral  Pilkington Suncool™ 70/35
0.39 Clear/Neutral  Pilkington Suncool™ 70/35 OW
0.40 Clear/Neutral  Pilkington Suncool™ One 60/40
0.42 Clear/Neutral  Pilkington Suncool™ 70/40
0.45 Clear/Neutral  Pilkington Suncool™ 70/40 OW


  • Colours for identification purposes only
  • Figures based on IGU incorporating 6mm Pilkington Optifloat™ Clear pane unless otherwise stated
  • * g-value depends on which thermal insulation glass is selected as inner pane
  • ** g-value depends on which thermal insulation glass is selected as inner pane (all based on 4 mm thickness)
  • For higher g-values please refer to our Thermal Insulation glass product range
  • For thicknesses other than above calculate using Pilkington Spectrum