Easy Guide to Learn How to Make Cardboard Waterproof

Cardboard is the most popular material for packaging in the world. It is sturdier enough to pack a variety of products with high protection. The lightweight and affordability give rise the use of cardboard packaging. But there is one thing that affects its quality. Water can damage the cardboard boxes and make them soft. So, people always think about how to make cardboard waterproof? The answer is in this guide. Explore the 7 easy DIY Cardboard waterproofing methods.

Why Waterproof Cardboard Matters?

The Waterproof cardboard box is best to give safety to packed items. There are following reasons that make it necessary for waterproofing of cardboard packaging. 

Protect Items and Keep Them Dry

Valuable or fragile products are often placed in cardboard. Water can damage the packaging and the contents inside. Waterproof cardboard packaging is best to stop the water absorbtion inside. It ensures the safety of products in all conditions. The cardboard boxes becomes excellent for safe storage or transit with lamination.

Improve Durability and Longevity

The moisture can damage the quality of cardboard packaging. This makes cardboard boxes soft and easily collapsible. So, proper waterproofing of cardboard makes it stronger. The protective layer saves the surface from damages.

Reduce Waste and Spoilage

The strong packaging protects the products during delivery. It minimizes the risk of customer complaints. With coating you can make cardboard boxes compatible with extreme weather conditions. You can use strong and sustainable material to avoid the outer impacts. 

7 Proven DIY Waterproofing Methods

Here we mention the practical waterproofing methods for cardboard packaging.

1. Wax Coating

The use of wax coating for making cardboard waterproof is the oldest method. It is a traditional way to cover the surface of packaging with coating. It saves the surface from water and scratches. If you are wondering what wax coating cardboard is. Here we will explain in simple language. The thin layer of paraffin wax is applied to the cardboard box. This can repel the water molecules and save the box. This kind of box is ideal for food packaging and shipping needs.

(How to Apply Wax Coating at Home)

Follow the steps given below.

• Melt paraffin wax or beeswax with a double boiler.
• You have an option to choose cloth or brush to apply it.
• When it cools down it will become hard.

2. Waterproof Sprays

The next step to make cardboard waterproof is using spray. It is a quick way to get results.These sprays are very useful to make cardboard packaging surface waterproof. This is a handy approach that takes only a few seconds. You don't need to hire an expert for applying spray. This is very useful for furniture. Thus, small or large all brands use this user friendly approach.

(How to Apply Waterproof Sprays on Cardboard)

Follow these steps to use waterproof sprays on cardboard boxes.

• Choose a ventilated area for cardboard waterproofing through spray.
• The most important step is shaking the spray before its application.
• Keep the distance of 8 inches between surface and spray.
• Wait until it dries. This is important to enhance its effectiveness. 

3. Acrylic Coating

This is the best method to create strong water resistance. This also gives a smooth surface to the packaging.  It is a sustainable option to reduce the environmental impact.  The spray or roller is best to apply this coating. The choice depends on the packaging size. After dryness it creates a layer of protection against moisture and other particles.

It is versatile and offers different types of resistance. This also helps to retain the cardboard surface design with a thin layer. The coating will make the design visible to everyone without fading it.

(How to Apply Clear Acrylic Coating)

The application of clear acrylic coating on cardboard packaging requires mindfulness. The careful method minimizes the risk of damages.

• Use a brush or roller.
• Apply a thin, even coat of clear acrylic sealer.
• Let it dry completely.
• Apply a second coat for better resistance.

4. Lamination

The lamination is the most useful method of cardboard waterproofing. It is the plastic thin layer on the packaging surface to resist water particles. It can extend the shelf life of packaging and enhance its shine. Brands like the polished look that comes after its application. Thus, this becomes the first choice of manufacturer. It makes the packaging durable enough to avoid the outside impacts. The laminated packaging is long lasting and strong enough to withstand in all harsh conditions. This may be less eco friendly but highly effective for packaging durability.

(How to Laminate Cardboard for Waterproofing)

• The first thing is the use of laminating sheets or films.
• Cut their size according to the size of the box.
• Place cardboard between the layers of film.
• There are two options like you can use glue or a lamination machine.
• Both ways the result will be good. The machine will press it effectively and emit bubbles.

5. PVA Glue

It is the most affordable method to make cardboard packaging waterproof. This is the best hack that is mentioned above. The PVA glue is mixed with water to create longer strength. This can create high protection against water molecules. It is useful for daily life. This goes through the different cycles of dryness. It adds stiffness to the packaging. The glue dries easily and doesn't leave any marks.

(How to Use PVA Glue to Waterproof Cardboard)

• Mix PVA glue with water (approx. 1:1 ratio).
• Use the simple brush for their application
• Allow to dry completely.
• You can use extra layers of these coatings to enhance safety. This totally depends on the users.

6. Silicone Coatings

Silicone coating provides excellent water-repellent properties for cardboard. They form a protective surface layer that moisture cannot easily pass through. It is best for the packaging that has more interaction with moisture. 

This silicon coating has various ways of application. Brands use spray or dipping methods for their application. The silicon treatment is useful for outdoor environments. This has limited the recyclability of boxes. The separation of silicon from cardboard is difficult.

(How to Apply Silicone for Waterproofing)

• You can choose the silicon spray.
• Then apply the thin layer on the surface.
• Let it cure completely according to the instructions.

7. Fiberglass Resin

Are you wondering how to waterproof cardboard for outdoor use? Fiberglass resin is one of the most effective solutions. This method provides extreme durability and strong waterproofing. It is best to handle the extreme weather conditions.

This will provide a tough layer of coating that avoids moisture. Thus, brands choose it for long term or outdoor uses. It is best to apply in a ventilated area.

(How to Apply Fiberglass Resin for Heavy-Duty Protection)

• The first step is to wear gloves. Then mix the fiberglass resin to harden.
• Follow the instructions that are necessary to follow.
• Brush a thin layer onto the cardboard.
• Let it harden completely.

Conclusion

These methods make cardboard packaging waterproof, improving its durability and sustainability. You can choose the option that best fits your product and environment. For fully customized waterproof cardboard packaging, Urgent Boxes offers expert guidance, free design support, low MOQs, and free shipping. Contact us today to create reliable packaging for delicate products.