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Why Windshields Are Made To Crack

Over 80% of replacements per year are caused by edge cracks, with impact points less than three inches from the edge.

Edge cracks are the result of:

  1. A Defect around the perimeter of the glass due to the thermal effect of the manufacturing process.

  2. Induced stress (the second defect) from the windshield being glued to the vehicle, which also aggravates the weak spot. (Defect)

  3. Tension fields created by the weak spot, mechanical stress and temperature variance.

  4. Fracture mechanics, where critical size and fracture force decreases as you approach the edge.

  5. Theory of Elasticity, where tension stresses are produced around the perimeter from inside versus outside temperature variations.

                 The $3 Billion Problem

            The $1 Solution

problem-solution.jpg

Visit the Edgeguard website and find out more about how their patented technology can prevent windshield edge cracks.

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References

   FAQ
   Before/After Photos
   Incorrect Resin Photos
   Correct Resin Photos
   Fundamentals of Windshield Repair Adhesives
   Repairable Windshield Damage
   Windshields are Made to Crack
   Windshields Repair Standard (ROLAGS)

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