Beveled Glass: Glass that has been formed with a specific type of polished or shaped edge work. A common use for beveled glass is in tabletops, desktops, shelving, and custom built furniture.
Closers: The mechanism that is attached to the door and the door jam to automatically close an entrance door.
Cutout: The process of precisely cutting out and removing a damaged windshield.
Dealer Items: Items that are purchased through an automobile dealership. These products will usually have the manufacturers name on the part.
Door Glass: This term usually describes the glass that is in the door of a vehicle. It can be a front door or a rear door.
Door Jam: The metal or wood frame that holds an entrance door.
DOT: U.S. Department of Transportation, the federal agency that oversees the National Highway Traffic Safety Administration and other transportation-related government organizations.
(Safe) Drive Away Time: The minimum amount of time that is necessary for the adhesive system to attain the necessary strength after an adhesive bonded glass part is installed in a vehicle to comply with Federal Motor Vehicle Safety Standards.
Encapsulated Parts: Glass parts that have been bonded with moldings or other glass parts. This process shortens the steps for installing a particular glass.
FMVSS: Federal Motor Vehicle Safety Standards, set by the National Highway Traffic Safety Administration, which detail the safety criteria manufacturers must meet in order to conform to regulations. The complete, current regulations may be found here: Federal Motor Vehicle Safety Standards.
Glazier: An individual who installs commercial or residential glass.
Glazing: The process and techniques of installing residential and commercial glass.
High Performance Glass: A color-coated glass that is used in commercial glazing applications.
HPR: High Penetration Resistance. HPR windshields are strengthened by using layers of laminated glass and are designed to reduce injuries in the event of breakage or accidents.
Insulated Glass (thermal panes): Two pieces of glass that have been sealed together with a vacuum created in the center for insulation purposes. This glass rejects heat and doesn’t affect the viewing quality of the window.
Laminated Glass: A safety glass that is made by taking two pieces of glass and sandwiching a piece of vinyl between the two layers.
Low E Glass: Glass that is treated with an energy-efficient coating to block the harmful ultraviolet rays of the sun.
OEM: Original Equipment Manufacturer. Original and new parts - including windshields and side glass - purchased directly from the manufacturer for aftermarket use.
NGA: National Glass Association, the largest glass trade association specifically for the North American glass industry with nearly 5,000 member companies. NGA represents the architectural, automotive and specialty glass segments of the industry. Its mission is to provide education and training for certification in auto glass replacement, auto glass repair, and glass installation and education and to promote quality workmanship, ethics and safety in the glass industry.
NGA-Certified: Installation specialists who have met the certification requirements of the National Glass Association. The two levels of certification are:
·Auto Glass Technician (AGT)
Minimum of six months work experience in the auto glass industry serving in the position of auto glass installer.
·Master Auto Glass Technician (MAGT)
Minimum of five years work experience in the auto glass industry serving in the position of auto glass installer and prior achievement of Senior Auto Glass Technician Level certification.

Nitrile Gloves: Surgical-grade, latex-free synthetic rubber gloves used to prevent oils and dirt from the hands contaminating glass surfaces. Nitrile gloves protect hands from harmful primer, prep and adhesive chemicals.
Obsolete Glass: Automotive glass that is no longer manufactured by the usual methods.
OEM: The initials that describe Original Equipment Manufacturer products. This is glass that is used on vehicles from the factory. The Aftermarket OEM glass meets the same engineering specifications as the original glass. Non-OEM glass uses a reverse image technology, which allows similar, but not exact duplication of the original glass. Non-OEM glass may overhang, have flat spots in the glass, or not seat properly when installed. This can cause stress cracks and possible wind noise and water leaks.
Perimeter: The outside edge of the windshield where the urethane is applied.
Pinchweld: The one-inch ledge surrounding the opening of the vehicle that supports the windshield. On that pinchweld the urethane adhesive attaches to the glass.
Plexiglass: Brand name for plastic sheets of various thickness used in residential and commercial glazing. It can be molded and is used in a variety of ways from display cases to windowpane installation.
Primers: A chemical undercoat applied to the pinchweld to prepare the surface for optimum urethane adhesion.
Quarter Glass: This is the glass that sits to the rear of the front door glass. It is only found in 2-door models.
Spandrel Glass: Brand name of glass that is made by printing inorganic coloring ink on float glass and by heating to fuse the coloring into the glass surface.
Structural Integrity: Your vehicle's ability to retain roof strength and structure during a rollover accident.
Threshold: The metal plate that a door centers over when the door is closed. It helps seal the entrance against water and air infiltration.
Urethane: A family of polymers ranging from rubbery to brittle. Usually formed by the reaction of a diisocyanate with a hydroxyl; also called polyurethane. A high strength polyurethane adhesive is the material used to bond the glass to the vehicles body in today's automobiles.
Urethane Bed: The area along the pinchweld where the bead of urethane is applied.
Vehicle Make: This refers to the manufacturer of the vehicle, such as Ford, Chevrolet, or Dodge.
Vehicle Model: This refers to the type of vehicle such as Mustang, Sebring or Camry.
Vehicle Style: This refers to the vehicle’s body design such as 2-door, 4-door, convertible, or SUV.
VIN: Vehicle Identification Number. This is a 17-digit combination of letters and numbers that's unique to your vehicle. Your VIN is embossed onto a small plate attached to the dashboard at the bottom left side of your windshield.
Vintage Automotive Glass: See Obsolete Glass.
Windshield: The glass in a vehicle that stretches from the driver’s side to the passenger’s side across front of the body of the car.
Windshield Repair: A process that can be used to repair a rock chip in a windshield. It is not a complete fix because it will usually leave a slight infraction in the glass. However, it does keep the break from spreading from that impact point.