How to Make Waterproof Cardboard? 7 Proven Methods for 2025

When it comes to packaging, waterproofing cardboard is an essential step to ensure your products reach customers safely and undamaged. Waterproof cardboard not only protects against moisture damage but also extends the product’s shelf life and minimizes replacements. In this blog, we’ll explore 7 proven methods to make waterproof cardboard for 2025 and beyond.

Method 1: WAX COATING

One of the most basic and effective ways to waterproof cardboard is by applying a wax coating. You can use bee’s wax or paraffin wax, which can be applied manually or using a machine. This method is suitable for packaging food, cosmetics, and pharmaceutical products. To apply the wax coating, simply melt the wax and brush it evenly onto the cardboard surface.

Advantages:

• Suitable for a wide range of products
• Inexpensive
• Easy to apply

Method 2: LAMINATION

Lamination involves applying a thin layer of plastic or resin to the cardboard surface. This method creates a robust barrier against moisture and other external factors. Lamination can be done using a machine or manually, depending on the scale of production. It is ideal for packaging electronic devices, clothing, and accessories.

Advantages:

• Provides an excellent barrier against moisture
• Suitable for high-stakes applications
• Can be customized with graphics and logos

Method 3: VARNISHING

Varnishing involves applying a water-based or solvent-based coating to the cardboard surface. This method is suitable for packaging books, documents, and artwork. Varnishing not only waterproofs the cardboard but also adds an attractive finish.

Advantages:

• Easy to apply
• Ideal for packaging fragile or delicate items
• Can be customized with colors and finishes

Method 4: SILICONE COATING

Silicone coating is a popular method for waterproofing cardboard in the packaging industry. It involves applying a silicone-based liquid to the cardboard surface and then allowing it to dry. This method is suitable for packaging food, cosmetics, and pharmaceutical products.

Advantages:

• Provides excellent waterproofing and UV resistance
• Suitable for high-temperature applications
• Easy to clean and maintain

Method 5: PVC COATING

PVC (Polyvinyl Chloride) coating is a popular choice for waterproofing cardboard due to its excellent barrier properties. This method involves applying a PVC-based liquid to the cardboard surface and then allowing it to dry. It is suitable for packaging toys, clothing, and accessories.

Advantages:

• Provides excellent waterproofing and UV resistance
• Suitable for high-temperature applications
• Can be customized with colors and finishes

Method 6: BIAXIAL ORIENTATION PLYBOARD

Biaxial orientation plyboard is a specialized type of cardboard that involves orienting the fibers in multiple directions to create a strong and waterproof structure. This method is ideal for packaging heavy-duty items, such as machinery and equipment.

Advantages:

• Provides excellent strength and durability
• Suitable for heavy-duty applications
• Waterproof and UV-resistant

Method 7: COMBI-COATING

Combi-coating involves applying multiple coatings to the cardboard surface to create a robust barrier against moisture and other external factors. This method is suitable for packaging high-stakes applications, such as medical devices and aerospace components.

Advantages:

• Provides excellent waterproofing and UV resistance
• Suitable for high-stakes applications
• Can be customized with colors and finishes

Conclusion

Waterproofing cardboard is a crucial step in packaging to ensure the safety and integrity of products. With these 7 proven methods, you can choose the best approach for your packaging needs. Remember to consider factors such as product type, scale of production, and budget when selecting a waterproofing method. At Get Packaging Services, our team of experts can help you choose the right waterproofing method for your business. Contact us to learn more about our packaging services. Don’t compromise on quality and integrity – choose waterproof cardboard for your products and keep them safe from moisture damage.