The performance of ClearShield is verified by independent testing organisations, laboratories, universities and major glass companies.

First we will look at how ClearShield-protected glass measures up against unprotected glass.

Contact angle and Hydrophobicity


Hydrophobic glass (water repelling) has a higher contact angle compared to unprotected glass. The contact angle is an estimated measure of the water repellence on that glass. A contact angle of greater than 90° indicates hydrophobicity.

ClearShield is a polymeric resin that will make the surface of the glass more hydrophobic. Typically, the contact angle on the surface of ClearShield Glass can be measured at 104°.

Typically, this measurement is used as a broad indicator of the effectiveness of the initial application for product development and quality control purposes. Another test typically used for that purpose is also the abrasion test.

While these measurements offer a brief and limited scope of initial performance in these areas, the greatest test is long-term results under many conditions and in many environments or real world expectations of a product’s performance.

The Corning Museum of Glass, NY, comments that 'many factors influence the rate of corrosion and no laboratory test to date is capable of predicting service behavior under all conditions'. Therefore we should measure what is important, and not make important what is measurable.

When you consider that ClearShield was the pioneer of low maintenance/easy clean glass technology more than 30 years ago and has proven its ability to renovate, protect and maintain hundreds of millions of square feet of glass, all other technologies begin to pale in comparison.

Contact angle marchine