Why Choose Purepack’s Corrugated Plastic Signs 18 x 24?
- 4 mm thickness: rigid enough to stand up in the wind, light enough to ship economically.
- Corona-treated: double-sided corona treatment, Dyne value ≥ 50, strong adhesion for printing.
- 18 × 24 size: lighter than 24 × 36, suitable for short-cycle events (Open House, election season).
- The dimensional tolerance is ± 0.5mm, and there will be no “displacement” during printing.
- We have exported to over 120 countries and understand the 18 × 24 signage in different markets.

Enough Production, Fast Delivery, and Constant Quality
Every year, Purepack produce more than 300,000 18 × 24 corrugated plastic signs. Our company has two separate production lines of blank 18×24 corrugated plastic signs without any interruption or production changes year-round. We can ensure:
- Consistent inventory:The 18 × 24 corrugated plastic signs are available all year round and you can send them without waiting for the manufacturing process as soon as you place an order.
- Constant formula:The separate lines don’t change the production process and neither the thickness, the color nor the corona value of the board will be changed because of the production process.
- Fast cutting process: With the 18 × 24 cutting, we can perform the layout and the layout on the 4 × 8-foot large board with a board utilization rate over 95%.
We know more about on how to select the right thickness
We give you suggestions based on the following usage situation:
- 3mm: It is suitable for indoor use or for short-term outdoor use (1-2 weeks). Corrugated plastic sheet 3mmis light and inexpensive and will be good for a shorter service life.
- 4mm: This thickness is standard and good for outdoor use for 2-6 months. 4mmcorrugated plastic sheet is stiff enough to resist any shaking at a wind speed of 20mph. Suitable for most usage situations.
- 5mm: It is rarely required. 5mm corrugated plastic sheetis suitable for very windy situations or for your usage that requires longer periods of time (over 6 months).

- Technical Data
- Customer Gallery
- Quality Certification
- Factory Gallery
| Product Name | Corrugated Plastic Signs 18 x 24 |
| Thickness | 3mm, 4mm, 5mm, 6mm or designed as your requirements. |
| Size | Any size can be customized according to your requirements. |
| Color | Black, blue, grey, red, yellow, green or customized as your requirements. |
| Packaging | PE film wrapping+corner protection+wooden pallet, or according to your requirements. |
| Certificate | ISO9001, ISO14001, SGS, TUV |
| MOQ | 1000 pieces |

It all depends on the usage. The unit price of 18 x 24 is relatively low, and within the same budget, one can buy more sheets to cover a broader area. The unit price of 24 x 36 is high, but the single information quantity is large, which suits contexts like main roads that require high visibility. When the budget is not sufficient, 18×24 would be better. When the goal is maximum visibility, then 24 x 36 is better.
- Each batch of boards: thickness measurement (± 0.05mm), dyne value (≥ 45), color (Lab * colorimeter).
- Each batch of cutting: 5% sampling for size measurement (18 ± 0.5 inches, 24 ± 0.5 inches).
- Each batch of printing: Conduct 3M tape adhesion test (ASTM D3359 standard), ink shedding ≤ 5%.
- Each batch of shipment: accompanied by Dain value test report and size inspection report.
The 18×24 corrugated plastic signs are designed with a 24-inch H-shaped galvanized steel ground stake. When the ground stake is inserted into the soil, it will be 8 inches above the ground surface. It your area has strong wind, we advise you use 30-inch ground stakes.
























