Coroplast Signs

Affordable, tough & waterproof.


Are you looking for a budget-friendly advertisement for seasonal sales and promotions? Do you need to spread the word about an upcoming event or special occasion?

Our custom-printed corrugated plastic lawn and yard signs are an affordable and effective way to inform and advertise in both public and private settings.

Richly pigmented, UV resistant inks are applied to a protected, lightweight, and shock-absorbent plastic base material, making our lawn signs suitable for both outdoor or indoor use. Because corrugated plastic is extremely lightweight, these versatile signs are a breeze to store, transport, and set up quickly and easily.

Ideal for any short-term purpose, you can use a yard sign for two days or two years. Removeable and repositionable, our lawn and yard signs are affordable, durable, and made to last.

Our signs are:

  • Customizable
    Print any combination of graphics, images or text.
  • Affordable
    A cost-effective way to communicate your message to the community.
  • Durable
    Waterproof and suitable for all weather conditions, indoors or outdoors.
  • Vibrant
    UV stable inks create high-quality, vivid images that are long-lasting and eye-catching.

What is Coroplast?

Our lawn and yard signs are made from corrugated plastic – a tough, waterproof, fluted twin wall polypropylene plastic material. Two smooth, flat plastic sheets sandwich a zig-zag folded plastic material in the middle, forming a smooth and sturdy surface ideal for signage.

Our highly pigmented, UV resistant inks are printed on a vinyl substrate which is then laminated on the corrugated plastic to protect the sign in all weather conditions.

Corrugated plastic goes by a number of brand names including Polyflute, Proplex, Correx, Twinplast, Corriflute, and Corflute, but you’re probably more familiar Coroplast, a registered trademark of Coroplast, LLC.

Designed to withstand a number of environmental conditions, Coroplast signs are durable and waterproof. They’re not made to last forever, but they will last a considerably long time before needing to be replaced.

Non-toxic to humans and animals, corrugated plastic lawn and yard signs do not contain harmful BPA, and they can withstand both high and low temperatures without releasing harmful chemicals.

The plastic is flame retardant, UV protected and recyclable under Resin Code 5. This means the material can be melted down at its end of use to be made into a variety of products including plastic bins, buckets, and household plastic products. It is not biodegradable, however, so please bring your used corrugated plastic signs to a dedicated recycling facility when you’re finished with them.

You’ve got options

Our Coroplast lawn and yard signs are fully customizable. Choose any combination of graphics, text, or full-colour images.

Your corrugated plastic sign can be made in any size, up to 60” x 120”, but our most commonly requested sizes are:

  • 48” x 96”
  • 24” x 36”
  • 12” x 24”

Ways to display

A versatile medium, corrugated plastic signs can be displayed in a variety of ways. From suction cups and Velcro strips, to easels and sandwich boards, your options are endless. Here are some of the most common display methods:


If you wish to display your sign on sidewalks or other busy foot traffic areas, then an A-frame is the way to go. These sturdy frames allow you to display signage on either side of the frame, and the corrugated plastic sign can be switched out as frequently as you like. Ideal for businesses and services that cycle through annual sales and promotions.

Mounting stakes

The classic way to display a yard sign is to mount it onto wire stakes, which can be hammered into the ground for study support.


You can often find corrugated plastic signs hung from hooks. Holes can be punctured into the plastic sign to hold hooks, grommets, ropes or zip ties. This method allows you to fasten the sign to tall posts, fences, or other existing locations.

Common Uses

This style of sign is often referred to as a yard sign, lawn side or curb sign because of its versatility. Ideal for advertising businesses and services, promoting personal or community events, or informing the public, our corrugated plastic signs are great for:

Announcement signage

  • For rent signs
  • For sale signs
  • Yard sales
  • Garage Sales
  • No trespassing signs
  • Home security warnings
  • Elections
  • Political campaigns
  • Point of Purchase signage
  • Window signage

Utility signage

  • Major announcements
  • City maintenance advisories
  • Construction sites
  • Wayfinding signage
  • Temporary parking signage

Business signage

  • Now hiring
  • Career fairs
  • Real estate sales
  • Open houses
  • Landscaping services
  • Flea markets
  • Farmers markets
  • Trade shows
  • Youth camps
  • Youth sports

Promotional signage

  • Pop-up sales
  • Limited-time promotions
  • Product launches

Support signage

  • Frontline workers
  • Health care workers
  • Unions
  • Strikes
  • Marches
  • Sports teams
  • Competitions

Event signage

  • Parades
  • Festivals
  • Fundraisers
  • Charity events
  • Graduations
  • Weddings
  • Bridal showers
  • Baby showers
  • Bachelor/Bachelorette parties
  • Birthday parties
  • Anniversary parties
  • Family reunions
  • Block parties
  • Community events
  • School events
  • Church events

Care instructions

Our custom-printed corrugated plastic signs are easy to maintain. If using outside, you’ll want to wipe it down occasionally to prevent a buildup of dirt and grime. To do so, use a soft cloth and soapy water.

To store your signs, stack them flat without anything laid on top of them, or stand them up against a wall in a space that is dry and room temperature. Do not store signs in hot environments like automobiles for long durations, as this may cause the material to warp.

Free Quote and Design Consultation

If you’re looking for lawn or yard sign in St. John’s or Newfoundland, our custom-printed corrugated plastic signs are a cost-efficient way to spread your message quickly and easily. If you want to get started with your custom-printed Coroplast sign, but are not sure where to start, our talented graphic design team can assist you with the design and placement of your sign.

Sign Guru NL is an expert in designing and printing custom-printed signage. If you need further help or advice with deciding which product would work best for you, contact Darrel, the Sign Guru, today.

Contact Darrell, the Sign Guru, for a quote today.