Product Description
The 4mm Corrugated Plastic Sign Blank – 24" x 18" is a versatile, industry-standard substrate widely used by sign shops and print professionals. Manufactured from fluted polypropylene, this panel delivers excellent rigidity while remaining lightweight and easy to install.
With the 18" flute direction, this version is optimized for landscape orientation signage, making it a popular choice for contractor signs, directional signage, and promotional graphics that require a wider visual layout.
These sign blanks are compatible with UV flatbed printing, screen printing, and vinyl graphics, providing a smooth, professional finish for both indoor and outdoor applications. The opaque white surface ensures bold color reproduction and clean readability in all lighting conditions.
Common Applications
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Yard signs (landscape orientation)
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Political and campaign signage
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Contractor and jobsite signs
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Event and directional signage
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Retail and promotional graphics
Key Features
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Industry-standard 4mm thickness
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24" x 18" landscape-oriented sign size
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18" flute direction for proper stake alignment
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White opaque finish for vibrant print results
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Lightweight yet rigid construction
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Waterproof and weather-resistant
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Smooth surface for printing or vinyl application
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Easy to cut, drill, and fabricate
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Recyclable polypropylene (PP – Resin Code #5)
Specifications
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Material: Corrugated Polypropylene (Coroplast®-style)
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Thickness: 4mm (0.157")
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Size: 24" x 18"
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Flute Length / Direction: 18"
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Color: White
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Packaging: Each
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Finish: Smooth printable surface
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Indoor / Outdoor Use: Yes
✔ Fits Common Stake Systems
Designed for proper flute alignment to work with standard wire stakes and mounting systems used in landscape signage.
✔ Print-Ready Surface
Compatible with UV flatbed printing, screen printing, and vinyl graphics for crisp, professional results.
✔ Indoor & Outdoor Performance
Waterproof and UV-resistant material ensures reliable performance in outdoor environments.
✔ Size Comparison Tip
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18" x 24" (Portrait): Ideal for yard and political signs
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24" x 18" (Landscape): Best for contractor signs and wide-format messaging
✔ Pro Tip
For windy locations or extended outdoor use, consider upgrading to 10mm Corrugated Plastic for added rigidity and durability.
