ASTM Flexural Strength Test Prove Windshield Repair Resins

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Windshield Repair Resin Strength Lab Test After Exposure

This is the latest ASTM Flexural Strength Test on Ultra Bond's windshield repair resins. Below is a chart that illustrates how our resins are indeed Stronger Than a New Windshield and in our thicker viscosity resin, beyond the strength of a new windshield.


The purpose of this project is to determine the strength of the laminated glass by performing impact and penetration tests following the ANSI/SAE Z26.1-1990 and flexural strength test in accordance with ASTM C-158-84.


ANSI/SAE Z26.1-1990, "America National Standard For Safety Glazing Materials For Glazing Motor Vehicles and Motor Vehicle Equipment Operating on Land Highways-Safety Code".


ASTM C158-84, "Standard Methods of Flexural Testing of Glass Determination of Modulus of Rupture)".


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This is a 12-inch Ultra Bond Long Crack Windshield Repair After a Rollover Crash

WINDSHIELD REPAIR RESIN STRENGTH RETENTION AFTER EXPOSURE BY ASTM- D 1062 -96

  • Test 1 – no exposure
  • Test 2 - 2 hour boil
  • Test 3 – 400 hours QUV followed by temperature cycling -30 f to +200 f. Measurement - lbf/in
Resin Test 1 Test 2 Retention Test 3 Retention
2400 CPS 436 992 228% 642 147% (gain)
1600 CPS 418 884 211% 553 132% (gain)
400 CPS 356 1190 334% 1050 295% (gain)
60 CPS 291 342 117% 537 185% (gain)
45 CPS 556 668 120% 495 88%
20 CPS 513 341 117% 419 82%

WINDSHIELD REPAIR RESIN RELATED BLOGS....

Ultra Bond's Unbreakable Windshield Repair Resin Best In The World...

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Date: Nov 12, 2013

Author: Richard Ultra Bond

Category: Windshield Repair Resins

Ultra Bond manufactures the worlds only unbreakable windshield repair resins. But what does it mean to be the best? Being the best can be measured by both Real World performance results and lab tests. The data and proof tell the story and everything outside that is just noise and unfounded baseless arguments. Below are links to several lab tests, proof in lawsuits where even Ultra Bond was used as a standard to prove how....

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Facts You Should Know About Windshield Repair Resins....

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Date: Sept 17, 2017

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Category: Windshield Repair Resins

Understanding the science behind a windshield break and crack; how a windshield is made and the resins created to fix windshields are important for anyone in the windshield repair industry to know.This deep understanding of windshield repair chemistry will help you buy better resin and relay to your customer that you are the expert they should trust to repair their safety device. An  adhesive is a substance that bonds surfaces....

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Windshield Repair Resin As Strong As New Glass Stated In U.S Supreme Court....

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Date: Mar 21, 2017

Author: Richard Ultra Bond

Category: Ultra Bond Legal News

The class action Cullen v. State Farm was an action against State Farm alleging that a windshield repair did not and could not restore the windshield to pre-loss condition and therefore State Farm owed all consumers who got a repair the money for a new windshield minus their deductible. State Farm has prevailed thus far and here is what the Ohio Supreme Court Ruling stated on the merits of windshield repair...... 

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