18x24 4mm Corrugated Plastic Sheets 25 Pack Green - Lightweight Lawn

Our review of the 18x24 4mm corrugated plastic sheets finds them best suited for small businesses, real estate agents, garage sale hosts and crafters who need an affordable, weatherproof sign board that is easy to cut and reuse. The single biggest reason to buy is durability combined with light weight: these double-sided, waterproof sheets handle outdoor conditions and are simple to mount or write on by hand or with screen printing, making them a practical choice when cost, portability and reusability matter most.

Key Features

• Double sided blank surface: Both sides are smooth and printable, giving you full design space for graphics or hand-lettering on each face.
• Waterproof and reusable: The corrugated plastic resists moisture and stains so signs can be wiped clean and used again outdoors.
• Lightweight 4mm construction: The 3/16 in thickness balances impact resistance with low weight for easy mounting in A-frame holders or stakes.
• Easy to cut and shape: The sheet material trims smoothly with common tools so you can create custom shapes or dividers for crafts and projects.
• Versatile applications: Useful for lawn signs, school projects, aquarium baffles, packaging accents, and temporary displays.
• Bulk 25 pack: A pack of 25 sheets provides enough quantity for multiple events or repeat campaigns without frequent reordering.

Who It's For

These corrugated plastic sheets are ideal for real estate agents, event organizers, yard sale hosts, and small sign shops that need a low-cost, weatherproof substrate for short- to medium-term outdoor signage. DIY crafters and schools will also appreciate the blank double-sided surface for posters and projects.

Those who need permanent, heavy-duty signage or high-end photographic prints should look elsewhere; this product is built for lightweight, reusable and inexpensive signs rather than long-term architectural displays.

Pros & Cons

Pros

• Durable and waterproof material that stands up to outdoor use and can be wiped clean.
• Double-sided blank panels give full design flexibility on both faces.
• Lightweight 4mm corrugated construction is easy to handle and mount.
• Bulk 25 pack offers good value for repeat use or multiple signs.

Cons

• Not intended as a permanent rigid panel for long-term architectural signage.
• Blank surface requires finishing (printing or hand lettering) before use.

Specifications

Brand	WHOLESALE ARTS AND FRAMES
Size	18 x 24 in
Thickness	4 mm (about 3/16 in)
Quantity	25 sheets per pack
Color	Green
Surface	Double sided, smooth and blank
Applications	Lawn signs, poster board, packaging, aquarium baffles

Our Verdict

These 18x24 4mm corrugated plastic sheets are a solid, cost-effective choice for anyone needing lightweight, reusable outdoor signs or craft panels. They deliver good durability for short- to medium-term use, plenty of printable surface area, and the bulk pack delivers value for recurring events or multiple installations.

Frequently Asked Questions

Are these sheets waterproof?
Yes - the corrugated plastic is waterproof and can be wiped clean after use.

Can I cut these to custom shapes?
Yes - the material trims cleanly with common cutting tools and is suitable for custom shapes and dividers.

Will they work in A-frame sign holders?
Yes - the thickness and weight are compatible with most A-frame holders and simple mounting methods.