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Windshield Repair 201 - Making the Repair

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Windshield Repair 201 - Repair Instructions - Pg 1
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Windshield Repair 201 - Making the Repair
Learn how to repair windshields with our free course on Windshield Repair. Know which Windshield Repair Kits are available and which kits fit your repair needs.

Be informed by seeing a comparison of the kits and processes before you begin, and be able to determine whether a windshield can be repaired or needs to be replaced.

These kits are used to repair bullseye, spider web, star, chip, and combination windshield damage. Some kits can repair cracks. See kit comparison chart for specifics.

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Making the Repair:

Windshield Repair Instructions:

Repairs should be completed as soon after damage has occurred as possible to avoid allowing contaminants to get into the cavities and cracks of the damage especially waxes, soaps, and oils which could cause adhesion difficulties. The windshield should be shaded from direct sunlight until the entire repair is complete.

  1. Note: the optimal windshield temperature for most repair resins is between 50 and 90 degrees Fahrenheit, 10°C to 32°C. Temperatures outside this range on the low side will cause the resins to be too thick and cure or flow too slowly where temperatures above this range may cause the resin to cure too quickly.

    Caution: it is important that the resin not come in contact with painted surfaces or any finished surface on the car as it could cause damage to the surface.

  2. Preparation for Repair
    Move the vehicle into a shaded area. Repairs must always be preformed in shaded areas and on windshields that have been shaded long enough that they are not warm or hot to the touch. There must not be any UV or sunlight directly on the windshield during the repair process.

    Place cloths near the bottom of the windshield below the damage on the inside and on the outside of the windshield. This is to protect the car's finishes in the event that resin runs down the windshield on either side of the glass. It is best to have a drop cloth covering the painted surfaces such as the hood in around the repair area to a distance that if a part were dropped or resin dripped from a part it would land on the cloth and not on the vehicle.

  3. Remove Loose Glass
    Clean or remove any loose pieces of glass from the damaged area with the pushpin or razor blade. Do not touch the glass with your fingers as this might leave oil on the glass.

  4. Clean Damage Area
    Clean windshield around the damaged area with a dry cloth or alcohol towelette if provided in kit. Do not use any alcohol products that may have perfume or oils added. Make sure the area is dry and clean before moving on to the next step. If an air supply or canned air is available, blow the damaged area to ensure no dust or debris remain in the area to be repaired.
    (DO NOT Blow directly into damage at close range as this could damage your windshield.)

  5. Attach Resin Applicator Base to Windshield
    While making sure center of resin applicator base is centered over damaged area, attach applicator base to the windshield by pressing the suction cups against windshield until their centers are flat against the glass. Not much upward pressure will be applied against the glass by other parts of the applicator but fully engaging the suction cups will ensure the device does not move while in use. Check the device center by looking through the whole or from inside the vehicle. Make sure not to allow the suction cups to cover any cracks extending out from the point of damage.


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