HAPANGODIR Corrugated Plastic Boards Yard Signs 12x18 20-Pack — 4mm Weather‑Resistant, Double‑Sided White

HAPANGODIR 12" x 18" corrugated plastic boards are lightweight, weather-resistant blank yard sign sheets designed for easy cutting, printing, painting and outdoor display.

These 4mm-thick coroplast sheets come in a 20-piece pack sized for common yard signs, garage sales, elections, and craft projects. Each panel is smooth on both sides with a bright white face for high-contrast printing and hand-applied designs. Built to withstand rain, sun and impact better than ordinary posterboard, the boards balance rigidity and portability so signs hold their shape while remaining easy to carry and install.

How durable are these corrugated plastic panels outdoors?

They’re formulated for repeated outdoor use without the warping or rapid water damage typical of paper-based boards. The corrugated structure adds strength while the plastic surface resists moisture, fading and light impacts.

• 4mm thick coroplast construction for stiffness and weather resistance
• UV-resistant surface slows color fading from sunlight
• Waterproof material sheds rain and prevents saturating
• Impact-tolerant corrugated core reduces cracking versus thin plastics

Can I customize these boards with printing, paint or markers?

Yes — both sides are smooth white, giving a clean base for printers, vinyl, spray paint, acrylics or permanent markers. The boards accept ink and adhesive well, so printed graphics and pasted materials adhere cleanly and stay legible.

• Compatible with wide-format inkjet printing and screen printing
• Easy to spray paint, brush paint, or write on with permanent markers
• Vinyl lettering and adhesive-backed decals bond reliably
• Edges cut cleanly with a utility knife, scissors or box cutter for custom shapes

How simple is it to install and transport these yard sign sheets?

The sheets are lightweight, which makes them easy to move and position, and standard 12" x 18" sizing works with many common sign stakes and frames. Their stiffness reduces sagging between stakes and they store flat to save space between events.

• 12" x 18" fits many H-stakes, wire frames and easels
• Lightweight panels are easy to carry and stack for transport
• Cut-out holes or slots accept zip ties and stake inserts without tearing
• Packs of 20 provide multiple signs for events, promotions or wayfinding

What sizes, quantities and finishing options are included?

This listing supplies twenty 12" x 18" sheets, each 4mm thick, in bright white on both faces for double-sided messaging when needed. The boards arrive flat and ready to trim, print, or mount depending on the project.

• 20 panels per pack — economical for campaigns or bulk signage
• 4mm corrugated thickness for a balance of durability and flexibility
• Double-sided smooth surface for two-sided displays or redundant messaging
• Carefully packaged to avoid bending during shipment

Who is this product for? HAPANGODIR corrugated plastic boards suit small business owners, event planners, political volunteers, school project coordinators, crafters and DIYers who need affordable, weather-ready signage. If you regularly create yard signs, temporary outdoor notices, promotional displays or personalized craft pieces that must endure sun and rain, these blank white coroplast sheets offer a reliable, easy-to-customize substrate that simplifies printing, painting and mounting.