Home / Windshield Repair Resin / Windshield Chip Repair Resins

NEW as of November 2025. At Ultra Bond we altered the formula of 20 and 40 to get the 3-Point Bend Test score of the 20cps resin to 100%. We were able to do that and it scored 100%+ cured under pressure (CUP) and not cured under pressure. Not curing under pressure (CUP) normally can reverse the wicking of the glass that took place and with low viscosity (under 40-45cps ) there will be shrinkage.  With the Wonder Bar Tools, both the 2-bar bridge and one-bar with the 3-inch suction cup and the Black Tool have pure compression. This mean the break and all the legs are flexed open at once symmetrically. When the flex is released (we call the "Flex and Release Method")  with the resin under pressure there is a forceful wicking of the glass and an overfill of the legs and bullseye. Doing this twice during the repair as shown in our videos with the new formula reached 100% + new laminated glass strength cured under pressure and not cured under pressure (CUP). The option is yours, not curing 20 or 40 under pressure you may sometimes get a bubble under the impact point from shrinkage in the bullseye or void under the impact. If this happens when you remove the tool, put the tool back on and cure under pressure. Large combination breaks with a large bullseye should be cured under pressure.

ROLAGS Mechanical Strength Test by 3-Point Bend Test after Thermal Cycling.

Scores by tool and curing light:

NOTE: With the Single Wonder Bar Tool with the 3-inch suction cup, Flex and Release by pushing on the end of the bar with your thumb and then release when the legs fill. Do this twice during the repair as shown with the videos of the Wonder Bar Bridge and Black Tool as well as the usual one minute vacuum during the repair to degas the resin.

TEST SCORES:

NEW 40 Resin 

• Single Wonder Bar with the 3-inch suction cup, no CUP with 2 Bond Wands side by side ,remained intact =over 100%
• Single Wonder Bar with the 3-inch suction cup, not cured under pressure (CUP) with 2 Bond Wands side by side =107%
• Single Wonder Bar with the 3-inch suction cup, not cured under pressure (CUP) with 2 Bond Wands side by side =111%
• Singe Wonder Bar with the 3-inch suction cup, not cured under pressure (CUP) with 2 Bond Wands side by side,  remained intact =100%+

Wonder Bar Bridge (2 Bar Tool) Cured Under Pressure is 108% New Laminated Glass Strength

50 resin - Single Wonder Bar with the 3-inch suction cup, not cured under pressure (CUP) with 2 Bond Wands side by side =108%

This is the 40 CPS stone chip windshield repair resin. Our 40 resin has Mechanical Strength of 108% of new windshield glass. Use to fill star-breaks  and can be used in cold temperatures. The 13 ml bottle of 40 cps will get you about 325  drops of windshield repair resin. Ultra Bond has the highest quality adhesives and we are the only windshield crack repair company that restores strength to over 100% new windshield strength with both chips and long cracks. The repaired windshield will be STRONGER THAN A NEW WINDSHIELD.