Windshields are difficult to handle and can be dangerous. Be very cautious when removing a windshield and get a helper to move the windshield.

Before embarking on this project, check with your insurance company to see if a windshield replacement is covered. If so, you may be able to take your car to a body shop and have it replaced without a hefty bill. If the situation is so bad that there is concern that the windshield may break apart due to the crack, do not drive the vehicle if possible and have the windshield repaired or replaced. If possible, keep the vehicle with the cracked windshield inside and in a more consistent temperature environment while you don’t replace the windshield. This will also reduce the risk from temperature changes from your defroster/heater blowing on a cold windshield or cold AC air hitting a hot windshield.

You may also use a knife to cut the seal along the perimeter before you try to pull it off. [2] X Research source

Wait several minutes for the lubricant to seep into the cracks before you move on. [3] X Research source Make sure the seal all the way around the windshield has been cut with a windshield removal cut tool. Very carefully work a rounded rod (a small phillips screwdriver or a tire repair tool also work great) between the gasket and the windshield frame. Keep it lubricated with glass cleaner as you slide the rod around it for better results.

It may be easier to have the person inside push the window out first, loosening the window, and then you pull with the suction cups. Have the person inside the car recline the seat back so he can get their feet onto the glass and use his legs to push. Do not stand on the hood or roof of the car — this will damage the body. The windshield may come out suddenly, so make sure you are steady and balanced and don’t fall backwards.

Tape the windshield up in a thick blanket while you transport it to prevent cuts on any broken edges. [5] X Research source

Use water and a brush to clean the new windshield of dust before you start working.

Allow the primer to dry. Do not touch the primer or the oil in your fingers can prevent the sealer from sticking to the window or frame.

Using a V-shaped nozzle will help the urethane sits higher, forming a better seal with the windshield. [6] X Research source