A high performance, low-emissivity soft coated glass which offers excellent thermal insulation when incorporated within an insulating glass unit (IGU). It has a highly neutral appearance with optimal solar heat gain, thermal insulation and light transmission to provide the highest Window Energy Rating (WER) performance.

It is a single stock, soft coated glass which can be used in annealed form or toughened, resulting in a product with the same thermal performance and neutral appearance. Once fabricated into an IGU, it can be used in windows in all types of glazing applications in new houses, conservatories and in replacement windows for existing homes.


  • An alternative to the original hard coated Pilkington K Glass™.
  • When incorporated into a Pilkington energiKare™ double glazed unit, it can easily achieve up to and beyond A-rated windows in all frame materials.
  • Helps to reduce drafts near windows to create a more useful space in rooms.
  • Excellent light transmission which helps to reduce the need for artificial lighting.
  • Suitable for use in PVC-U, timber and aluminium profiles in both new and replacement windows.
  • Available in annealed form and can be toughened or laminated for use in areas which require safety glazing.

General information

Uniclass 2015

Pr_25_71_33_02 Annealed glass sheetsPrimary


H10/10 Patent glazing

H10/115 Patent glazing

H11/110 Curtain walling

H13/115 Structural glass assembly

L10/10 Wood windows

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Specification data - Annealed glass sheets

Product Reference

Pilkington K Glass™ S Low-E Thermal Insulation


4 mm

6 mm

Product Options

Maximum size:

6000 x 3210 mm.

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