Red Seal Auto Body Technician key terms

Gear worn to minimize exposure to workplace hazards, such as respirators, gloves, safety glasses, and hearing protection. In auto body work, PPE is essential when handling chemicals, paints, and power tools.

A document providing information on the hazards, safe handling, storage, and emergency procedures for a chemical product. Technicians must consult SDS for all chemicals used in the shop.

A reactive chemical group present in many automotive paints and clear coats, known to cause severe respiratory sensitization. Proper ventilation and supplied-air respirators are required when spraying products containing isocyanates.

Steel with increased yield strength achieved through alloying or processing, used in modern vehicle bodies for weight reduction and crash energy management. Repair methods differ from mild steel, often requiring specialized welding and heat control.

Steel with yield strength typically above 550 MPa, used in critical safety structures like B-pillars and rockers. It often cannot be repaired and must be replaced using OEM procedures.

An ultra-high-strength steel, often hot-stamped, with tensile strength exceeding 1,300 MPa. It is used in occupant protection zones and generally must not be heated or straightened; replacement is required after deformation.

A vehicle design that uses aluminum for a significant portion of its body structure, requiring dedicated tools, isolated work areas, and specialized joining methods to prevent galvanic corrosion and cross-contamination.

Corrosion that occurs when two dissimilar metals are in electrical contact in the presence of an electrolyte. In auto body repair, it can result from improper mixing of steel and aluminum components or tools.

The systematic process of identifying all direct and indirect damage to a vehicle after a collision, including structural, mechanical, and electrical systems, to determine repair scope and cost.

A documented breakdown of parts, labor, and materials needed to restore a vehicle to pre-accident condition, often prepared using estimating software and following insurer and OEM guidelines.

A line item in an estimate that covers consumable refinishing products such as paint, primer, thinner, and masking supplies. It is typically calculated as a percentage of refinish labor or by a formula agreed with insurers.

A repair technique where a portion of a structural or outer panel is replaced by cutting and joining a new section, following OEM-defined locations and procedures. Improper sectioning can compromise structural integrity.

The uniform space between adjacent body panels, such as doors, fenders, and hoods. Correct gap alignment is critical for proper fit, function, and appearance after repairs.

A heavy-duty repair rack equipped with hydraulic pulling equipment and measuring systems used to straighten and align a vehicle's structural frame or unibody to OEM specifications.

A vehicle construction method where the body and frame are integrated into a single structure. Unibody vehicles require specialized straightening and measuring procedures compared to body-on-frame designs.

A section of a vehicle's structure designed to deform and absorb energy during a collision, protecting the occupant compartment. Repairs must not alter crush zone performance.

A welding process that uses pressure and electric current to join overlapping metal sheets at discrete spots. It is the preferred method for replicating factory welds in high-strength steel structures.

A welding process that uses a continuous wire electrode and shielding gas to join metals. In auto body repair, it is commonly used for steel panels, with variations for aluminum and silicon bronze.

A welding process that uses a non-consumable tungsten electrode and inert shielding gas to produce high-quality welds. It is often used for aluminum and thin-gauge steel panels.

The area of metal adjacent to a weld that has been altered by heat but not melted. Excessive HAZ can weaken high-strength steels and promote corrosion if not properly treated.

A joining method that uses a rivet to pierce and interlock overlapping metal sheets without pre-drilling. It is commonly used in aluminum-intensive vehicle assembly and repair.

The cleaning, sanding, and treating of a substrate before applying primer or paint to ensure proper adhesion and a smooth finish. It includes removing contaminants, rust, and old coatings.

A paste-like material applied to repaired panels to fill minor imperfections and restore contour. It must be applied over properly prepared and primed surfaces and shaped before curing.

A thin, contrasting color sprayed over primer or body filler to help identify low spots and imperfections during sanding. It is sanded away to reveal the true contour.

A coating applied to a prepared surface to promote adhesion, provide corrosion protection, and fill minor imperfections before topcoat application. Different primers are used for steel, aluminum, and plastic.

The pigmented layer of a refinish system that provides color and coverage. It is applied over primer and then protected by a clear coat in base coat/clear coat systems.

The transparent topcoat applied over a base coat to provide gloss, UV protection, and durability. It must be applied in a controlled environment to avoid defects like runs or dust nibs.

A controlled enclosure with filtered air and ventilation used for applying automotive coatings. It protects the finish from dust and overspray and helps contain hazardous vapors.

The process of adjusting a paint formula to match a vehicle's existing finish, accounting for variations, fading, and application differences. Techniques include spray-out cards and blending.

An adjacent panel onto which refinish is applied in a gradient to achieve an invisible transition between repaired and original finishes. Blending is common when a direct color match is not possible.

A flexible, paintable material applied to body seams to prevent water intrusion and corrosion. It must be applied correctly after panel replacement to maintain factory appearance and protection.

A lint-free cloth coated with a sticky substance used to remove dust and debris from a surface immediately before painting. It helps prevent defects in the finish.

A high-strength adhesive used to bond automotive glass to the vehicle body. It contributes to structural integrity and must cure properly before the vehicle is driven.

Electronic systems that assist drivers, such as lane departure warning and automatic emergency braking, often using cameras and sensors mounted on the windshield or body. Repairs and glass replacement may require recalibration.

A diagnostic scan performed before repairs to document existing fault codes and ensure all vehicle systems are functioning. It is important for identifying pre-existing issues and planning ADAS calibrations.

A diagnostic scan performed after repairs to verify that no new fault codes are present and that all systems are operating correctly, including ADAS calibration status.

A specialized plastic or nylon tool designed to remove interior and exterior trim clips and fasteners without damaging the components. Proper use prevents scratches and broken clips.