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Sudhakar uPVC Windows and Doors

WinSLT: New Mobile Calculation Tool from Trosifol™


Trosifol ™, part of the Japanese-based company Kuraray Group, has launched a new mobile calculation tool ‘WinSLT’.

Developed by Sommer Informatik in Rosenheim, it is a new app for calculating the light, solar and heat parameters of glazing containing interlayers. Trosifol® is a leading global brand of polyvinyl butyral (PVB) and ionoplast interlayers for laminated safety glass applications in the architectural, automotive and photovoltaic industries.

The app has specific laminated safety glass configurations that can now be calculated for the deployment of laminates from the Trosifol TM product range. From various glass and interlayer thicknesses and compositions, the tool calculates all the relevant data inclusive of the Ug-value of the complete panel.

With the aid of an intuitive input mask, WinSLT determines the necessary light, solar and heat characteristics of any desired configuration. All the calculations are in line with the latest standards, such as EN ISO 673 (Ug-value), EN 410 (g-value, reflection, absorption, transmittance), EN ISO 520223 (total value, previously EN ISO 13363) and ISO 15099/ ASHRAE (Ug-value, SHGCvalue, reflection, absorption, transmittance). All the relevant data for the various Trosifol TM PVB and ionoplast interlayers (SentryGlas) have been pre-loaded and stored in an extensive database.

For input, only the desired products have to be selected along with the thickness of the glass ply, gas space, laminated layer and the desired window composition. The app then outputs the functional data, calculating the reflection, transmittance absorption and, in addition, the cross-sectional temperature curve.


The app is available in German, English, French, Italian and Spanish and can be downloaded from the Google Play Store and Apple App Store. It is available online at Trosifol™ Website

For further information on the software developer Sommer Informatik GmbH, visit: or write to

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