Sign Material
Coroplast
On this page
At a glance
- Type Twin-wall polypropylene
- Use Indoor / Outdoor
- Surface Fully waterproof
- Thickness 4, 6, 10 mm
- Lifespan Short-to-mid term
Spec Sheets — Coroplast (Inteplast)
Grades, sizes & colors
Technical Properties
PP corrugated board data
Overview
What is Coroplast?
Coroplast is the best-known brand of corrugated plastic — a lightweight twin-wall polypropylene board with a fluted core sandwiched between two flat faces, much like cardboard but waterproof and weather-resistant. It’s North America’s market-share leader, and the name has become shorthand for the whole material category.
Because it’s cheap, light, and weatherproof, it’s the default for high-volume, short-term signage: yard signs, real estate, political campaigns, events, and construction. It cuts and scores easily, takes screen and direct print well, and mounts on stakes or grommets in seconds — though the fluted texture and limited lifespan make it a functional rather than premium choice.
Specifications
Key properties
| Material | Twin-wall (fluted) polypropylene |
|---|---|
| Common thicknesses | 4mm, 6mm, 10mm |
| Finish | Matte or gloss; wide range of colors |
| Indoor / outdoor | Both; waterproof and weather-resistant |
| Mounting | Stakes, adhesive, grommets, or frames |
| Fabrication | Screen print, direct UV print, vinyl; scores & cuts cleanly |
Where it's used
Common Applications
Stake-mounted signs for real estate and promotions.
Political & Campaign Signs
High-volume, low-cost signage for campaigns.
Lightweight wayfinding and event placards.
Weatherproof safety and information boards.
Affordable listing and open-house signage.
Short-term in-store and sidewalk signage.
Honest assessment
Strengths & Considerations
Strengths
- Affordable — ideal for bulk and temporary signage
- Waterproof and weather-resistant for outdoor use
- Lightweight and easy to transport, install, and remove
- Versatile across yard, event, and directional signs
- Scores, cuts, and prints quickly for fast turnaround
Considerations
- Not for long-term use — can fade and warp over time
- Functional appearance rather than premium
- Fluted texture can affect print clarity if misaligned
- Easily punctured under sharp pressure or impact
Working with Signs New York
How we fabricate Coroplast signs
Compare Materials