Capillary Daylighting

OKALUX light-diffusing insulating glass offers numerous advantages: The capillary slab in the cavity allows for an even and shadow-free illumination with daylight deep into the room. The sun and glare-protection are very good, the heat insulation excellent and the transmission values individually adjustable to the requirements.

Thanks to a functional layer in combination with a gas-filled cavity for double- and triple-glazing build-ups, an optimized Ug-value can be achieved with the product variants OKALUX+ and OKALUX K.

High Functionality

  • Optimal, even illumination of the room, without hard shadows
  • Effective sun and glare protection
  • High light transmission, light entry can be adjusted individually
  • High colour rendering
  • Good heat and sound insulation
  • Protection from UV rays
  • Bird-friendly solution
  • Fire protection according to requirements


  • Daylight entry reduces amount of artificial light required
  • Reduction of cooling loads in summer
  • Fully recyclable
  • Long-Lasting, maintenance-free and easy to clean
  • Attractive Aesthetics

Attractive appearance

  • Vivid surface with depth effect
  • Capillary inserts can be printed with colour and décor

User Comfort

  • Comfortable daylight atmosphere
  • Effective privacy protection
  • Reduced amount of solar input into the building




OKALUX – Build-up vertical glazing

Double Build-up vertical glazing

OKALUX – Build-up horizontal glazing

Double Build-up horizontal glazing

  • Maximum dimensions: 2,000 mm x 4,500 mm, larger sizes available upon request

  • All technical values, such as light transmission, TSET and Ug-values can be varied by using other constructions and glass types. 


Total Thickness

Ug-value [W/(m2K)]



Double Glazing mm Krypton Argon Air SHGC (%) direct (%) direct

from 16

- - 2.7 - 1.3 1 25 - 43 21 - 45
1 Depending on capillary insert 8 - 40 mm 



Comparison of the Ug-values depending on the Position of installation

Comparison of the Ug-values depending on the position of installation

References Overview