20 Sheets 4mm Corrugated Plastic Board, Waterproof Sign Sheet for Indoor/Outdoor

Patelai 20-Pack Corrugated Plastic Sheets – 18" x 24" Blank Sign Boards, 4mm Thick Waterproof Poster Board for Yard Signs, Garage Sales, Real Estate, Events & DIY Projects (White, Double-Sided)

📌 Heavy-Duty, Weatherproof & Reusable
Crafted from durable 4mm thick corrugated plastic , these blank sign boards are UV-resistant, waterproof, and won’t warp —perfect for outdoor or indoor use year-round.

🎨 Double-Sided & DIY-Ready
Both sides are smooth and blank , allowing for custom signage from every angle . Ideal for painting, markers, vinyl, stencils, or adhesive letters.

✂️ Customizable & Easy to Cut
Easily trim to any shape or size using scissors or a box cutter. Great for crafting event signs, directional arrows, photo props , or window decals.

🏡 Multi-Purpose Signage Solution
Use for yard sales, estate sales, open houses, parking signs, birthdays, political campaigns, school projects , and more. A budget-friendly, professional-looking sign for any occasion.

🎁 Value 20-Pack
Includes 20 sheets (18"x24")—plenty for personal projects, bulk signage, or resale . Lightweight yet sturdy for long-term or one-time use .