4mm Corrugated Plastic Signs — Built Tough, Priced Smart
Whether you're promoting a listing in Coeur d'Alene, running a campaign in Spokane Valley, advertising an event in Boise, or directing foot traffic at a Tri-Cities tradeshow, 4mm corrugated plastic signs from Spokane Signs & Banners deliver professional-quality results at an unbeatable value.
What Are Corrugated Plastic Signs?
Also known as coroplast signs, these lightweight panels feature a twin-wall fluted construction that gives them exceptional rigidity without adding bulk. At 4mm thick, they're the industry-standard choice for temporary and semi-permanent outdoor signage. The surface accepts full-color UV-resistant printing that stays vibrant through rain, wind, and intense sun — perfect for the varied climates from Spokane and Pullman to Salt Lake City, Missoula, and Reno.
Ideal Uses
- Real Estate Signs — For agents across Spokane, Bellevue, Portland, and beyond
- Election & Political Signs — High-volume runs for campaigns throughout Washington, Idaho, Montana, and Wyoming
- Yard Signs & Event Signage — Garage sales, grand openings, community events in Yakima, Wenatchee, Bozeman, and more
- Contractor & Job Site Signs — Visible, durable branding for crews in Coeur d'Alene, Post Falls, Twin Falls, and Billings
- Directional & Parking Signs — Fast-deploy wayfinding for venues in Seattle, Tacoma, Bellingham, and Everett
Specs & Materials
- 4mm twin-wall corrugated polypropylene (coroplast)
- Full-color, UV-resistant digital printing
- Lightweight and easy to install with standard H-wire stakes (available separately)
- Weather-resistant — suitable for extended outdoor use
- Available in custom sizes to fit your exact needs
Easy Ordering & Fast Delivery
Upload your artwork, choose your size and quantity, and our production team gets to work immediately. We ship FREE with standard delivery in 7–10 business days to locations across the Pacific Northwest, Intermountain West, and beyond — from Spokane and Cheney to Casper, Cheyenne, Logan, and everywhere in between.
Ready to make an impression? Upload your design today and let Spokane Signs & Banners put your message in front of the people who matter most.
4mm Corrugated Plastic Signs
Order Custom Corrugated Plastic Signs — Durable, Lightweight & Delivered FREE in 7–10 Days!
4mm corrugated plastic signs are the go-to choice for yard signs, real estate signs, election signs, and event signage across the Pacific Northwest and Intermountain West. Lightweight yet weather-resistant, they hold up outdoors through wind, rain, and sun. Order online and get FREE delivery in 7–10 days.
This Product has Fast FREE Delivery!
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PLEASE NOTE** If we design your print file, the Estimated Times begin with your written approval of the design print layout that we email or text to you. Or if you upload a final print ready file, that does not require modification, we print right away without contacting you further, unless otherwise instructed in the notes that you can enter during checkout. Deadline for approval cutoff time is prior to 4 PM (PST), weekdays. Free Delivery areas include all local addresses or anywhere in the lower 48 states and some products also ship to Alaska and Hawaii. Expedited Production and Delivery is available for some items and above estimated delivery times will be less if choosing an expedited option, contact us for more details.