Patelai Corrugated Plastic Sheets 24 x 48 in - 12-Pack Black, 4mm Waterproof Double-Sided Yard Sign Boards

Patelai corrugated plastic poster boards are lightweight, weather-resistant 24 x 48 inch sheets designed for temporary indoor and outdoor signage and DIY projects.

These blank, double-sided black panels come in a bulk pack of 12 and offer a durable, easy-to-customize surface for yard signs, garage sales, events, school projects, crafts, and short-term displays. At about 4 mm thick, the hollow fluted construction keeps each sheet rigid yet easy to cut or mount. They resist light moisture and sun exposure, making them a practical option when you need affordable, portable signage or protective layering for work surfaces.

How durable are these corrugated sheets for outdoor use?

While built from waterproof, sun-resistant polypropylene, these sheets are best suited for temporary outdoor applications. They withstand light rain and brief sun exposure but are not intended for long-term burial or constant harsh weather. For short-term events, sale signs, and seasonal displays they perform reliably.

• 4 mm thickness gives moderate rigidity without heavy weight
• Waterproof material tolerates brief wet conditions
• Sun-resistant surface suitable for short outdoor deployments
• Recommended for temporary, not permanent, exterior use

What customization methods work well on these poster boards?

The smooth, double-sided face accepts markers, paints, vinyl cutouts, and adhesive media. Lightweight construction makes the sheets simple to trim with a utility knife or score-and-break, so you can tailor shapes and sizes quickly. Their surface is also ideal for stenciling or spray finishes when you want bold, weather-visible graphics.

• Cut with utility knife, shears, or scoring tool for precise edges
• Paintable with acrylics, spray paint, or permanent markers
• Adheres to vinyl lettering and stickers for professional signage
• Can be punched or stapled for mounting on frames or stakes

How easy is installation and what mounting options are available?

These corrugated boards are light enough to mount using common fasteners and attachments without specialized hardware. Their fluted structure also permits zip ties or wire through punched holes, and the thin profile bows slightly to accommodate fences or stakes. Fast setup is particularly helpful for temporary displays and last-minute promotions.

• Attach with tape, staples, zip ties, or thumbtacks
• Punch holes for stakes, ropes, or cable ties
• Fits inside frames or can be leaned against surfaces for quick displays
• Stackable for storage when not in use

What sizes and quantity are included, and how are they packaged?

Each order contains 12 identical sheets, each measuring roughly 24 by 48 inches (61 x 122 cm) and about 4 mm thick. Packaging keeps the panels flat and ready to use; the bulk count gives enough material for multiple signs or several craft projects. The black color provides strong contrast with light-colored lettering or graphics.

• 12 pieces per pack for multiple signs or layered projects
• Sheet dimensions: 24 x 48 inches (61 x 122 cm)
• Thickness: approx. 4 mm (0.16 inches)
• Double-sided blank surface in black for high-contrast designs

Who is this for? These Patelai corrugated plastic boards suit event organizers, small-business owners, real estate agents, teachers, crafters, and anyone staging quick, visible signage without heavy expense. They’re ideal when you need portable, easy-to-customize panels for short-term promotions, open houses, yard sales, classroom displays, or protective craft surfaces.