Prepare the injector. Take a few minutes to familiarize yourself with the way in which the injector works. There are many different models, but most are easy to use if you follow the instructions. Check the following:

• Identifies the syringe or cylinder in which the resin is loaded and the lid or rubber ring is used for closing.
• Find the bookmark or bolt used to adjust the pressure by placing the injector on the windshield or away from it.
• Check the instructions on how to operate the injector. An injector syringe has a single piston, but some bridge type injectors may have a single mechanism.

Cut a small hole if necessary. This is the step that creates the greatest risk of further damage the windshield. Fortunately, this only is necessary if you are going to repair a long crack that does not end in a circular or semicircular hole, or if you go to fill a “star-shaped break” small in which no missing piece of glass.

To cut the hole, placing a glass extractor (or sturdy needle) in the star-shaped crack or a fissure end. Cut it gently with the removal tool with suction cup (or any solid object) to remove a small piece.

In some cases, you must punch in the hole before carving. For repairs at home, never more than ¼ of the glass. It may be best to hire a professional if you cannot cut a hole without a drill.

Loading the resin into the injector. Most repair kits come with two types of resin. A is designed to fill cracks and the other to fill cracks. Load the injector with the resin needed for your repairs following the kit instructions. In most cases, only you need a few drops of resin.

Place the nozzle in position to repair a crack. It covers the suction cups with a thick layer of lubricant so they can move through the windshield. Place the suction cups into position so that the injector tip is over the hole in the end of the fissure. Adjust it until it lightly presses the glass.

If your kit does not include lubricant used petroleum wax (Vaseline).

If you’re using an injector syringe suction cups, just hold it at the end of the fissure.

The resin applied at the beginning of the crack. Move the injector for the first 5 to 7.5 cm (2-3 inches) of the fissure. Resin applied as directed model. Usually, this involves replicating the air with a piston or some other mechanism suction and then release it to enter the resin into the crack. Move it from side to side in the crack, making sure to enter the resin.

If the resin does not enter the crack, bend the glass gently with your thumb as the fixtures. This should only be necessary at the beginning.

Seals the rest of the fissure. Move the injector throughout the length of the crack. When you’re sure the resin has entered the crack, you should be able to seal the crack with a slow movement.

Note that until now the crack will still be visible.

Fill cracks and dents with a thicker resin. Load the injector with a resin to fill holes or the type that includes your kit to fill dents. If you’re using a bridge injector, lubricates a little suction cups to adhere firmly to the glass. Place the tip of the injector over the crack and the system uses suction or pressure until the resin completely fills the dent.

The syringe injector kits typically include a separate suction cup that can be placed over the dent and has a hole to enter the syringe.

Remember that in the star-shaped cracks in which no missing piece of glass, you must first cut with a glass extractor.

If the injector contains a different type of resin, first clean it.

It covers the entire resin curing tape. These are also called curing strips or tabs when sold in different sizes. This assures the resin film during curing, preventing it from overflowing out of the crack or hole.

You will probably need an extraction tool with suction cup or a razor blade to remove the injector.

Never use plastic wrap or other substances that are not specifically designed for this purpose. Some block the ultraviolet light and, therefore, stop the curing process indefinitely.

Allow the resin to cure. Let the repaired areas will be exposed to direct sunlight or place them under an ultraviolet light until healed. This can take between 30 and 120 minutes, depending on the brand and the intensity of ultraviolet lamp or sunlight conditions. Check the instructions for your product and let dry for a longer time than indicated.

Scratch excess resin. Remove the strips of cured. Scratch the resin is in the windshield surface using a razor blade. Remove excess resin until the windshield is flat. If the windshield is cloudy or if the crack is still visible enough to interfere with driving the car, you’ll probably need to re-cure with a special resin for renewal of finishes. When finished, clean with a cloth and a glass cleaning.

Place the razor blade in a sturdy holder to prevent injuries.