WHAT ARE: Under the Hood labels

Under the hood automotive labels are subject to some of the harshest operating conditions in any labeling application. Several critical factors must be considered to ensure compliance with these constraints, including resistance to oils, chemicals, and extreme temperature variations.

Key Benefits of Under the Hood Labels

Effective under-the-hood labeling solutions must deliver:

• Chemical resistance to oils, coolants, fuels, and cleaning agents
• High durability to withstand abrasion and mechanical stress
• Resistance to extreme temperatures, both high and low

Guide to Under-the-Hood Automotive Labels

Expectations must remain high when selecting solutions for under-the-hood automotive labeling. When addressing labeling challenges in this environment, manufacturers typically evaluate multiple performance criteria, including:

• Abrasion and overall durability, as labels may be exposed during vehicle servicing and subject to rough handling by maintenance technicians
• Chemical resistance, due to regular exposure to oils, coolants, and other automotive fluids
• Longevity requirements, as vehicle labels must remain legible over an average vehicle lifespan of approximately 200,000 miles or 12+ years
• Safety color requirements, such as red or yellow warning labels for hazard identification
• Resistance to temperature extremes, whether from engine heat during operation or exposure to hot and cold climates
• Compatibility with various substrates, including metals and plastics

Motor Vehicle Under the Hood Label Solutions

Selecting a reliable labeling solution is critical in this environment. Thermal transfer printing technology, particularly when paired with resin thermal transfer ribbons, is well suited for under-the-hood automotive applications.

Resin ribbons are specifically formulated to meet automotive durability requirements and are designed to withstand exposure to extreme temperatures, chemicals, and mechanical wear.

When implementing the correct combination of thermal transfer ribbon and label stock, several key considerations apply:

• The printed text, symbols, and images must remain crisp and legible throughout the label’s entire service life
• The label material and adhesive must resist temperature fluctuations and securely adhere to a variety of surfaces, including metal and plastic components

Common Label Types and Applications

Label Types

• GHS hazard pictograms (small printed symbols and characters)
• Caution and warning labels (e.g., “Warning,” “Danger”)
• Identification labels and barcodes
• Federal safety certification labels
• Emission labels (Vehicle Emissions Control Information label – required), including:
  • Engine size
  • 12-digit engine identification number
• Service and replacement part labels

Applications

• Batteries
• Engine components
• Air conditioning compressors
• Spark plugs
• Air filters

Why Use Thermal Transfer Printing for This Application?

ARMOR-IIMAK thermal transfer ribbons provide a durable and reliable solution for under-the-hood automotive labeling. These ribbons are engineered to meet stringent requirements for print quality, color density, chemical resistance, and long-term legibility—ensuring compliance and performance throughout the vehicle’s service life.

For this application, we recommend the following products AXR 8 and AXR 800