How to Repair your Windshield Cracks.
How To Repair a Long Crack

How To Repair a Long Crack

Windshield Long Crack Repair is easy with the Crack Eraser system.

A repair will take about 10 to 15 minutes to perform. Cracks unlike chips get dirt in them from normal driving and expand with temperature changes. The sooner you do the repair the better it will look. Generally windshields with cracks over 2 months old should be replaced.

Long Windshield Crack

Long Windshield Crack

Long Cracks need to be repaired within one month for best results.
Step # 1 Check for Moisture

Step # 1 Check for Moisture

If the crack has been wet from the weather or a car wash it will need 1 to 2 hours in the sun to dry out before a repair can be performed. To check for moisture in a crack look at the crack straight on from above and you will see it plainly.  Then put your chin close to the windshield about 6 to 12 inches away and look at the crack at an angle to see if it mostly disappears. It should look pretty much the same from any angle if it is dry. If it goes away at any angle it has moisture it and will need to dry out. 

Step # 2 Stop Drilling Long Crack

Step # 2 Stop Drilling Long Crack

Drilling the end of the crack to help stop its progression. There are two methods of stopping the end of a crack. One is to drill just ahead of the crack about 2 widths of the drill bit or 2 16ths of an inch all the way to the plastic. When you hit the plastic you will feel the drill bit change and see a small disturbance where it went through the plastic.

If you bought a kit with a taper drill part way down about 1 half the distance to the plastic and tap a bull’s eye with a taper. If you are unsure of what is half way down to the plastic is use method # 1 and drill all the way to the plastic.

 

Step # 2 Photos of Stop Drilling Long Crack

Step # 2 Photos of Stop Drilling Long Crack

Use one of the 2 methods to stop drill the crack.
Picture of Stopped Crack

Picture of Stopped Crack

Probe points to drilled stop at the end of the crack.
Step # 3 Mounting Crack Erassr Tool

Step # 3 Mounting Crack Erassr Tool

 Lube the Crack Eraser tools suction cups. Next push down on the tool until the suction cups are down tight and all the air is out. Then slide the tool all along the crack clear to the edge and back to the end of the crack.  Keep the tool perpendicular to the crack. Make sure not to get grease in the crack.

 

Step # 3 Photos of mounting and sliding tool down crack

Step # 3 Photos of mounting and sliding tool down crack

Mounting and sliding Crack Eraser tool
Step # 4 Install the Injector and Adjust the Tool

Step # 4 Install the Injector and Adjust the Tool

Install the Injector and adjusting bolt by treading them in clock wise until they touch the windshield then turn each another 3 turns to put some pressure on the windshield and create a seal. The Crack Eraser tool should be level.

Step # 4 Photos of Adjusting Crack Eraser Tool

Step # 4 Photos of Adjusting Crack Eraser Tool

Tool should be level after adjusting.
Step # 5 Mounting the Crack Expander

Step # 5 Mounting the Crack Expander

Mounting Crack Expander.  Because cracks are tight at the tip it is necessary to put pressure from the inside on the crack. We use the Crack Eraser crack expander to flex open the first 1 to 6 inches of a long crack. Lube the suction cups and mount the expander on the inside of the windshield starting about 6 inches from the tip of the crack and slide it up to within 1/4 inch from the tip of the crack. Next turn adjusting bolt up clock wise until it touches the windshield. Do not start putting pressure on the crack yet.

Step # 5 Photos of Mounting Crack Expander

Step # 5 Photos of Mounting Crack Expander

Mounting Crack Expander
Step # 6 Adding Resin to Crack Eraser Injector

Step # 6 Adding Resin to Crack Eraser Injector

Add 8 drops of Crack Eraser resin to the injector. The injector should be just a head of the drill hole on the crack so no resin will start to go it until we are ready to inject the long crack.

Step # 6 Photos of Adding Resin to the Crack Eraser Tool

Step # 6 Photos of Adding Resin to the Crack Eraser Tool

Adding Resin to Crack Eraser Tool
Step # 7 Pressurizing the Resin to Start Injecting

Step # 7 Pressurizing the Resin to Start Injecting

Start to inject by sliding the Crack Eraser tool over the drill hole and treading the injector clock wise until the O Ring starts to stand up. The O Ring gets fatter when pressure is being applied to the crack. Do not turn injector in too far as to push the O Ring out of the injector. Next look to see if resin is flowing into the crack by looking at the crack from an angle 6 inches to 12 inches away from the crack. It usually helps if you put your chin almost on the windshield. If you look straight on you will not see resin flowing in. If you do not see resin flowing in you will need to start turning the crack expander clock wise until you can see resin going in the crack when looking at an angle. 

Step # 7 Photos of Resin starting to Flow

Step # 7 Photos of Resin starting to Flow

Resin Flowing
Step # 8 Sliding and Injecting the Crack

Step # 8 Sliding and Injecting the Crack

Now you are ready to start sliding and injecting the crack. You need to keep the Crack Expander ahead of the Crack Eraser injector. You must also not rock or disturb the vehicle while you are injecting. You also need to make sure resin is flowing by looking at an angle while injecting and adding resin pressure by turning the injector piston clock wise as you go as needed to keep the resin flowing down the crack. See photos and more explanation below.

Step # 8 Photos and explanation of injecting resin

Step # 8 Photos and explanation of injecting resin

Crack is Completely Filled
Step # 9 Removing the Crack Eraser Tool

Step # 9 Removing the Crack Eraser Tool

Remove tool by backing off the injector piston pressure off by turning the injector piston counter clock wise until the injector is off the treads. Next twist the tool of the windshield. Make sure the long crack is completely cured for at least 15 minutes in the sun before removing the Crack Eraser tool.  

Cleaning Windshield

Cleaning Windshield

Step # 8 Removing Crack Eraser Tool and Cleaning the Windshield
Finished Long Crack Repair

Finished Long Crack Repair

Below are photos of the finished long crack repair. I had to draw arrows so you can see where the crack was.
Finished long crack repair. The arrows point to where the crack was.
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