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Sign Guide

Yard Sign Materials: What Coroplast Is and Why It's Used

The corrugated plastic behind nearly every yard sign. Here's why it works.

Almost every yard sign you've seen — campaign, real estate, garage sale — is made of "coroplast." Here's what it is and why it's the go-to material for yard signs.

What coroplast is

Coroplast is corrugated plastic — lightweight, rigid, and weatherproof. Its fluted structure holds a wire stake easily, which is why it's the standard for yard signs.

Why it works outdoors

Unlike cardboard, coroplast shrugs off rain and sun for months, staying readable through the weather — essential for signs that live outside for a campaign or listing.

Affordable in quantity

Coroplast is cheap to produce in bulk, which is why yard signs and real estate signs are so cost-effective for saturation — every lawn for the price of a few coffees.

Pro Tip Coroplast yard signs are so affordable in bulk that ordering extra makes sense — for campaigns and listings, more signs across more lawns directly drives more recognition.

When to choose other materials

For permanent or premium signs, rigid materials like acrylic last longer; for storefronts, window decals or banners may fit better. Coroplast shines for temporary outdoor signage.

The yard sign workhorse

Coroplast — corrugated plastic — is the lightweight, weatherproof, affordable material behind nearly every yard sign and real estate sign. Perfect for temporary outdoor signage in any quantity.

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