Pilkington K Glass™ S


Pilkington K Glass™ S is a UK-manufactured, off-line coated, low-emissivity (low-e) glass intended to reduce levels of heat escaping through the glass of a window.

It has a neutral appearance and allows the suns heat to pass through the glass, making it an ideal choice for fabricators, glaziers and installers looking to optimise Window Energy Rating (WER) and meet regulatory requirements (e.g. minimum band B for windows in Table 4.2 of The Building Regulations 2010 (England) Approved Document L Volume 1)

Ready to specify Pilkington K Glass™ S?

Contact your local Pilkington UK representative today for technical guidance, test reports, samples, or details of your nearest UK supplier.

The Declaration of Performance (DoP) for our products can be accessed via www.pilkington.com/ce.  Supporting test evidence for the DoP can be requested via enquiries@pilkington.com.

April 2026
Version UK:2.1.1

Key Features
Applications
Downloads

Key Features

 

  • Low-e coating reflects heat back into the room, reducing heat loss.
  • Allows heat from the sun (passive solar gain) to enter the home/building.
  • Can help windows achieve WERs band A and higher across PVC-U, timber and aluminium frames.
  • Neutral view through glass due to high light transmission.
  • Available in annealed form and can be toughened or laminated without compromising performance or appearance.
  • No edge deletion required when used with Pilkington K Glass™ S-approved sealants.
     

Applications

Pilkington K Glass™ S is suitable for a wide range of residential and commercial projects:
  • New-build housing/buildings
  • Replacement and retrofit windows
  • Conservatories and garden rooms
  • Energy-efficient window systems designed to meet UK Building Regulations requirements
  • Insulating glass units for uPVC, aluminium or timber window systems
     

Pilkington K Glass™ S Downloads

Pilkington K Glass™ Range Consumer Brochure 
Pilkington K Glass™ Handling and Processing Guidelines
Pilkington Spectrum

Pilkington Spectrum is a Windows-based glass performance model which enables you to quickly and efficiently calculate key properties of a wide range of single glazing and insulating glass units. Also available as an app for mobile devices, you can use Pilkington Spectrum to provide the following information:

  • Light and solar properties (transmittance, reflectance, absorptance, g value, etc.).
  • Centre pane Ug-value.
  • Sound insulation values.
  • Global Warming Potential (GWP), or carbon footprint.
  • Ultra violet (uv) transmittance and colour rendering index (Ra).
  • Other properties (e.g. pendulum body impact resistance, fire resistance, resistance to manual attack, etc.).