Coroplast & Corrugated Plastic for Yard Signs and Temporary Signage
Corrugated plastic — widely known by the brand name Coroplast — is the go-to material for yard signs, lawn and political signs, real estate riders, event signage, and any short-to-medium-term sign that needs to be lightweight, waterproof, and inexpensive. The fluted twin-wall construction takes screen printing, digital print, and adhesive vinyl, cuts easily, and stands up to weather far better than cardboard or foam board. Central Sign Supplies stocks corrugated plastic sheets and pre-cut blanks at our Omaha warehouse, with same-day shipping on most orders when orders are placed before 3p.m. CST, and local pickup available.
Sheets vs. Blanks — Which Do You Need?
We carry corrugated plastic two ways. Full 4′×8′ sheets are for shops cutting their own sign sizes in volume — the most economical way to buy by the square foot. Pre-cut 18″×24″ blanks are the standard yard-sign size, ready to print or apply vinyl with no cutting required — ideal for real estate, political, and contractor signs.
Need a size, color, or quantity you don’t see online? Call 1-800-999-3160 — we can quote custom cuts and bulk orders.
What Corrugated Plastic Is Used For
Yard and lawn signs, political and campaign signs, real estate signs and riders, open-house and directional signs, garage-sale and event signage, parking and site signs, and point-of-purchase displays. It pairs naturally with yard sign stakes and H-frames for a complete ready-to-plant sign, and accepts ORACAL 651 adhesive vinyl for cut lettering and graphics.
4mm twin-wall (fluted) corrugated polypropylene ★
Full sheet: 48″ × 96″ (4′×8′) · Blank: 18″ × 24″
Waterproof, rust-proof, and rot-proof — rated for outdoor use
Compatible with screen printing, digital/UV printing, and adhesive vinyl
Flutes run vertically on standard yard-sign blanks for H-stake mounting
Lightweight and easy to cut with a utility knife or panel saw
Why Buy Corrugated Plastic from Central Sign Supplies
We’ve supplied sign shops, print shops, and sign installers from our Omaha warehouse since 1951. Corrugated plastic ships same day on most orders ★, with local pickup at 4222 D St for Omaha-area customers — handy on a freight-friendly product where shipping bulky sheets adds up. Buying for a campaign season or a big install? Call 1-800-999-3160 for volume pricing.
Corrugated Plastic — Frequently Asked Questions
What is coroplast?
Coroplast is a brand name for corrugated plastic — a lightweight, waterproof twin-wall sheet made of fluted polypropylene. It’s the most common material for yard signs and other short-to-medium-term outdoor signage. The terms “coroplast,” “corrugated plastic,” and “corrugated sign board” are generally used interchangeably.
What size do yard signs use?
The standard yard sign is 18″ × 24″ on 4mm corrugated plastic, which is the pre-cut blank size we stock. For other sizes, shops typically cut their own from 4′×8′ sheets.
Can you print on corrugated plastic?
Yes — corrugated plastic works with screen printing, digital and UV flatbed printing, and adhesive vinyl for cut lettering and graphics. It’s one of the most versatile and economical sign substrates available.
Is corrugated plastic waterproof?
Yes. Corrugated polypropylene is waterproof, rust-proof, and rot-proof, which is why it outlasts cardboard and foam board for outdoor signs.
What do I need to make a yard sign?
A corrugated plastic blank plus a wire H-stake, and your graphics applied by print or vinyl. We stock the stakes and the vinyl alongside the blanks. Call 1-800-999-3160 if you want help putting a kit together.
