Caution: Do Not Overfill – Allow for Expansion | Military Safety Warning Poster

Function before form. Safety before convenience.

“Caution: Do Not Overfill – Allow for Expansion” is a real-world safety warning historically found on fuel tanks, military vehicles (including classic M38 jeeps), and fluid containers.

The instruction exists for a reason:
overfilling liquids prevents thermal expansion, forces fuel into vapor lines, increases internal pressure, and creates serious fire and engine damage risks.

This poster preserves that language exactly as used in operational environments—clear, direct, and uncompromising.

Designed as functional wall art, it represents the mindset of military engineering:
anticipate failure, leave margins, respect physics.

Not decorative text.
A warning born from experience.

Key Features

• Design Style: Military / industrial safety signage

• Typography: High-contrast stencil lettering for instant readability

• Use Case: Garages, workshops, gyms, studios, offices, man-caves

• Orientation: Landscape

• Finish: Clean, matte print for minimal glare

• Size : 18 × 12 inches (Landscape)