Double Glazing Units - g-value guide

g-value Colour/tint Product (6mm panes)
0.18 Clear/Neutral Pilkington Suncool™ 30/17
0.23 Clear/Neutral Pilkington Suncool™ 40/22
0.27 Clear/Neutral Pilkington Suncool™ 50/25
0.20 - 0.28 ** Blue Pilkington Activ SunShade™  Blue
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 Clear/Neutral Pilkington Suncool™ 66/33M
0.36 - 0.43 * Green Pilkington Optifloat™ Green 
0.36 - 0.53 ** Bronze Pilkington Activ™  Bronze
0.37 Clear/Neutral Pilkington Suncool™ 70/35
0.41 - 0.52 * Clear/Neutral Pilkington Eclipse Advantage™ Clear 
0.42 Clear/Neutral Pilkington Suncool™ 70/40


  • 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