DIAMOND FUSION™ is permanent and is guaranteed for the lifetime of the glass.  Proven Internationally, it will not peel, chip, crack or blister.  Inside or out, it lasts for the life of the glass – with no special cleaners or reapplication required.

The following are test results from Dr. William C. LaCourse, Professor of Glass Science at the Institute for Glass Science and Engineering at Alfred University, New York, an independent testing laboratory. Dr. LaCourse is an expert in the study of glass and ceramics. He has done testing for major companies like PPG and Kohler. Below is a summary of the most important findings of his tests.
Dr. LaCourse states in his reports that our improved process has a remarkably low coefficient of friction when the glass is wet. He states that when glass is wet, it is by far the "most dangerous period" with regards to the potential for damage. The report says that "we believe that the (main) usefulness of your coating lies in its maintenance of a low friction coating over the life of the glass". Below is a formula that puts into layman's terms the results of the coefficient of friction tests.

Contact Angle

Treated with DIAMOND FUSION™ (DF1- Step #1) Treated with DIAMOND FUSION™ (DF2- Step #2) Untreated Glass

Contact angle is the scientific method of measuring the water repellency of a surface. The higher the number, the higher the water repellency of the surface. Material µ Untreated Glass 0.82 Improved DIAMOND FUSION™ 0.13 The latest improvement of the DIAMOND FUSION™ technology has an additional 2nd step that creates the 'capping' (in the chain of atoms) which changes the molecular composition of the treated surface. (Since Dr. Lacourse ran these tests the process has been improved again and now it consistently tests out at 116°-118°)  Material µ Untreated Glass 0.82 Improved DIAMOND FUSION™ 0.13

To make the test results for coefficient of friction useful, we have used a formula that translates the data into the force required to cause damage to the surface. Assume that a load of 10 lbs. has been placed on the rider under static conditions, and that this is the lowest load that caused cracking (no dragging). Using the formula we can now calculate the load that would cause cracking to occur when the rider is dragged across the sample.

Load required to damage surface:

Material	Load (lbs)
Untreated Glass	0.37
Improved DIAMOND FUSION™	4.00

Note that when comparing wet vs. wet friction calculations indicate that it would take more than 10 times the load (4.0 lbs. vs. 0.37 lbs.) to cause damage on your treated sample vs. the untreated.
In other words, the weight of a debris particle required to crack a piece of glass that has been treated with DIAMOND FUSION™ would need to be ten times heavier than the weight required to crack an untreated piece of glass.