Developed by General Motors Europe (GME), the “GME 14074 Automotive Interior Materials Sunscreen and Insect Repellent Resistance” standard was designed to evaluate the resistance of automotive interior materials to chemical contamination caused by commonly used sunscreens and insect repellents. These products frequently come into contact with vehicle interiors through passengers' skin, clothing, or personal belongings, making chemical resistance a crucial aspect of long-term interior durability.
The primary purpose of the GME 14074 standard is to determine whether automotive interior materials can withstand long-term exposure to the following chemicals:
These chemicals typically contain components such as:
Many of these materials can damage polymers, coatings, paints, leather surfaces, and decorative films, leading to permanent cosmetic or structural damage. This standard ensures that materials remain attractive and functional throughout the vehicle's lifespan.
Modern vehicles incorporate numerous decorative and soft-touch materials designed for both comfort and aesthetics. Unfortunately, these materials are frequently exposed to human contact. Typical exposure scenarios include:
Without sufficient resistance, these chemicals can cause the following:
Tests help manufacturers select materials that can retain their original appearance after repeated exposure.
The GME 14074 standard is applicable to many in-vehicle materials, including:
The exact choice of materials depends on the vehicle program.
The described test method generally follows these steps:
The test aims to simulate years of real-world consumer use.
Following exposure, auditors evaluate various performance characteristics, including those listed below:
Acceptance limits are defined by General Motors engineering requirements for each material application.
Chemical resistance testing offers several important benefits for automotive manufacturers:
Materials that do not conform to the GME 14074 standard may exhibit the following problems:
These problems are often irreversible and can significantly affect perceived vehicle quality.
Although developed for General Motors vehicles, the concepts behind the GME 14074 standard are applicable to many industries:
Many manufacturers now use similar sunscreen resistance tests in their internal specifications.
As General Motors transitions from regional engineering standards to global standards, the GME 14074 standard has been replaced by the GMW 14445 standard for new vehicle programs. While maintaining the same general purpose (evaluating the resistance of interior materials to sunscreen and insect repellent), the GMW 14445 standard offers a globally consistent testing methodology.
Consequently, the GME 14074 standard has played a significant role in ensuring the durability of automotive interior materials exposed to sunscreen and insect repellent chemicals. By simulating everyday consumer use, this standard helps engineers identify materials resistant to staining, discoloration, softening, and coating degradation.
Although replaced by the GMW 14445 standard for new GM projects, the GME 14074 standard remains valid for legacy vehicle programs and historical material qualifications, and its principles continue to influence the development of durable automotive interiors that maintain their appearance and performance throughout a vehicle's service life.
For many years, our organization, with its competent and experienced staff, has been understanding the needs of its clients, providing the advanced testing services they require, and assisting them in the establishment, implementation, and improvement of management systems. Within this framework, we also provide testing services compliant with the GME 14074 standard.
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