Pilkington Optitherm™ S1 Plus combines superior light transmittance with a highly neutral colour. It is the ultimate in thermal insulation and should be specified for any situation where excessive heat loss is a concern.

A product from the Pilkington K Glass™ or Pilkington Optitherm™ ranges makes up the inner pane of the double glazing unit. Its primary function is to prevent heat escaping through the windows and return heat back into the home.

Specify your projects quickly and easily with Pilkington Spec-it! If you know the target U and g values for your project, then Spec-it! can help you select the right product. Two clicks to Spec-it!

Install low emissivity (low-e) energy-efficient windows to help to reduce your heating bills by up to 20% each year. Using a product from our energy-efficient glass range in your windows will reduce your home’s CO 2 output, making your carbon footprint smaller and your home more environmentally friendly.

Pilkington Optitherm Range

Pilkington energiKare™ is the name given to our range of double and triple glazing used to improve the thermal efficiency of homes. It reduces the amount of heat lost through your windows and can also allow more heat energy from the sun in through the glass.

Pilkington Optiphon™ is a high quality acoustic laminated glass that offers excellent noise reduction without compromising on light transmittance or impact performance. Pilkington OptiShower™ Anti-corrosion glass for the bathroom; Pilkington Optitherm™ S1 Plus

An insulating glass unit comprising 4 mm Pilkington Optifloat™ Clear outer pane, 16 mm argon gas-filled cavity and 4 mm Pilkington Optitherm™ S1 Plus inner pane has a centre pane U value of 1.0 W/m 2 K.

When fitted with Pilkington Activ™ combined with a thermally efficient glass such as Pilkington Optitherm™ S1 Plus, your transformed conservatory will be warmer in the winter, cooler in the summer and will look cleaner than ordinary glass.

Pilkington Activ SunShade™ Blue combines solar control performance with self-cleaning. When used in an insulating glass unit with an inner pane of Pilkington Optitherm™ S1 Plus , the unit can cut out 80% of the sun's heat.