Patelai Corrugated Plastic Sheets 18 x 24 Inch — 12-Pack Black, 4mm Waterproof UV-Resistant Yard Sign Boards

Patelai 12-pack large 18 x 24 corrugated plastic sheets are waterproof, UV-resistant 4mm black poster boards designed for reusable outdoor and indoor signage.

These blank corrugated plastic boards come in a value set of twelve 18" x 24" sheets, each 4mm thick, giving you a durable, double-sided surface for yard signs, garage sale notices, directional displays, school projects, and temporary protection jobs. The lightweight, easy-to-cut plastic accepts paint, spray, and many printing techniques, while H-stake or tape mounting keeps installation quick and tool-free. Because the material is waterproof and UV-stable, it’s meant to withstand rain, sun, and repeated use across seasons.

How durable are these Patelai corrugated plastic sheets for outdoor use?

Patelai boards are made from weatherproof corrugated plastic with UV inhibitors, so they resist fading, warping, and moisture damage when used outdoors. Their 4mm thickness balances rigidity and lightness, making them sturdy enough for wind exposure yet easy to handle.

• 4mm corrugated construction for strength and flexibility
• UV-resistant formulation reduces sun bleaching over time
• Fully waterproof—suitable for rainy conditions
• Reusable for multiple events and seasons

What are the best ways to customize and mount these poster boards?

The smooth black surface accepts paint, markers, vinyl lettering, spray paint, or printed adhesive graphics. For mounting, you can use H-stakes for lawns, tape or zip ties for temporary fixes, or small tacks and screws for more permanent placements—no specialized tools required.

• Cut easily with scissors, utility knife, or rotary cutter
• Paint, stencil, or apply printed vinyl decals for graphics
• Mount with H-stakes, grommets, tape, or zip ties
• Create double-sided displays for 360° visibility

Will these sheets work for indoor projects, crafts, or temporary floor protection?

Yes—the lightweight boards are versatile for school displays, exhibition signage, craft backdrops, and short-term floor protection during light remodeling. Their rigid surface resists tearing and provides a clean black backdrop for photography or event decor.

• Perfect for classroom posters, presentation boards, and crafts
• Use as protective barrier for floors or table surfaces during projects
• Cleanable surface—wipe off paint splatters and marker residue
• Can be layered or trimmed to custom sizes for indoor use

How much material is included and what sizes should I expect?

Each purchase includes 12 identical corrugated plastic boards, sized at 18 x 24 inches (approximately 60 x 45 cm). That quantity covers multiple directional signs, a series of event graphics, or a large DIY project without frequent reorders.

• 12 sheets per pack for large projects or repeated events
• Each sheet measures 18" x 24" (60 x 45 cm)
• 4mm board thickness for balanced rigidity
• Black color provides high contrast for paint or vinyl

Who this pack is for: this Patelai 12-pack is ideal for small business owners, real estate agents, event planners, teachers, craft hobbyists, and homeowners who need a cost-effective, reusable signage solution. If you want lightweight, weather-resistant boards that cut, print, and mount easily for outdoor or indoor use, this set supplies enough material to complete multiple projects while keeping storage compact.