Cardboard is great for many things, but water is its biggest enemy. Ever wondered if it is possible to waterproof cardboard? The answer is yes, and it's much easier!
This blog will discuss how to make waterproof cardboard. We will share seven proven methods to waterproof cardboard for DIY projects, storage, or outdoor use. No matter if you choose wax coating or silicone sprays, each method is practical and effective.
Learn how to turn cardboard into a durable and water-resistant material. Explore tips to keep it safe from rain, spills, and wear. Whether you're a DIY enthusiast or need stronger packaging, there's a solution. Ready to make your cardboard last longer? Let's start with the basic method!
1. Wax Coating - A Traditional Waterproofing Method
Wax coating is a traditional method that is used to waterproof cardboard. Adding a coating on the cardboard or box surface leads to covering the upper layer of the cardboard against water damage.
Wondering what is wax coated cardboard? It is a cardboard with a thin layer of paraffin wax to repel water. Wax coated cardboard boxes are most commonly used in the food and shipping industry. These boxes are water-resistant during handling, shipping, or transportation.
How to Wax Coat Cardboard at Home?
Follow the simple steps to wax coat cardboard effortlessly:
- Firstly, use a double boiler to melt paraffin or beeswax.
- Secondly, dip the cardboard or brush the wax evenly over the surface.
2. Waterproof Sprays - Simple and Effective
Thinking about how to make waterproof cardboard quickly and easily? Waterproof sprays will be handy. These sprays create a water-resistant coating on the cardboard surface. You can use furniture waterproof spray to make cardboard waterproof.
Waterproof sprays are widely available and user-friendly. That's why this method is perfect for both small and large projects. The best part? You don't need any special skill to perform this method.
How to Apply Waterproof Sparys on Cardboard?
Below are the steps to apply waterproof sprays on cardboard.
- First, get a waterproof spray (easily available at most hardware stores).
- Now, lay the cardboard flat in a well-ventilated area.
- Finally, spray evenly, covering the entire surface. Now, let it dry.
3. Acrylic Coating - Easy Waterproofing with Style
Acrylic coatings provide a water-resistant layer. This coating is more eco-friendly than other coatings for waterproofing cardboard. You can apply acrylic coating via spraying or rolling. It forms a clear protective film over the cardboard without altering its appearance much.
Acrylics are versatile and can provide varying degrees of water resistance. Thinking about what to spray on acrylic paint to make it waterproof. Clear acrylic spray sealants are the best choice for this purpose.
How to Apply Clear Acrylic Coating on Cardboard?
Applying clear acrylic on cardboard requires careful handling to avoid streaks. Follow the steps below:
- Get some clear acrylic paint from a hardware store.
- Paint an even layer over the cardboard surface and let it dry.
- Add extra layers of acrylic paint for more protection.
4. Lamination - A Polished Waterproofing Solution
Lamination of the cardboard means adding a layer of plastic sheet over it. The plastic keeps the cardboard layer safe from water and makes it much more durable.
This waterproofing method for cardboard is approachable and offers a polished look. It provides heavy-duty protection that can easily withstand degrading moisture elements. Laminated cardboard maintains its rigidity even in challenging conditions.
How to Laminate Cardboard to Make it Waterproof?
Just follow these steps:
- The first step is to measure and cut plastic sheets according to the size of the cardboard
- Then, apply an adhesive. Now, press the plastic sheets onto your cardboard
- Finally, smooth out any bubbles and trim the edges if necessary
This method is easy but less eco-friendly than other methods.
5. PVA Glue - An Affordable Waterproof Hack
Looking for an affordable method on how to make waterproof cardboard? Use PVA glue with a water mixture. This mixture works well for waterproofing cardboard. The method is ideal for smaller projects.
A coat of PVA glue provides a water-resistant surface that suffices for most daily uses. Most PVA glues are waterproof, meaning they can endure multiple drying cycles. The best thing about this method is that the glue dries clear. So it won't affect the appearance of your cardboard.
How to Make Waterproof Cardboard with PVA Glue?
- Ensure to follow the below steps
- Mix an equal proportion of PVA glue and water
- Use a paintbrush to apply an even mixture coat to the cardboard
Let it dry, then add more layers for better protection. Everything is clear about this method.
6. Silicone Coatings - A Strong and Versatile Solution
Silicone coatings offer excellent water-repellent properties to cardboard. It helps you create a surface over cardboard that moisture cannot easily penetrate. These coatings are highly effective for specialized applications requiring utmost moisture resistance.
You can apply them in various ways, such as spraying and dipping. However, silicone coatings are less common. Also, separating silicon coating from the cardboard fiber in recycling becomes difficult.
How to Use Silicone for Waterproofing Cardboard?
The following steps will ensure that silicone coatings are even on cardboard.
- Clean the cardboard surface thoroughly.
- Shake the silicone coating can or tube well.
- Apply a thin, even layer of silicone using a brush or spray.
- Ensure full coverage, especially on edges and corners.
- Let the first layer dry completely.
- Apply a second layer for extra protection.
- Allow the coating to cure for 24-48 hours before use.
- Finally, check for any missed spots and touch up if required.
7. Fiberglass Resin - A Durable Waterproofing Solution
Curious about how to waterproof cardboard for outdoor use? Using fiber resin offers the best solution. This method is great for extreme durability and waterproofing that can withstand harsh environmental conditions.
Fiberglass resin is a powerful waterproofing agent. That's why it is perfect for heavy-duty or outdoor projects. But it's an expensive method and requires careful application in a well-ventilated area.
How to Apply Fiberglass Resin to Waterproof Cardboard?
The following steps will help you apply fiberglass resin to waterproof cardboard.
- First of all, wear gloves. Then, mix the resin with the hardener as directed.
- Now, apply the resin mixture to the cardboard with the help of a brush.
- Let it dry fully before handling.
So far, we have discussed 7 proven methods. Hopefully, you now know how to make waterproof cardboard.
Comparison of Different Cardboard Waterproofing Methods
|
Cardboard Waterproofing Method | Pros | Cons |
| Wax Coating | Affordable, effective, non-toxic, and safe for food-related use. | It may soften under high temperatures, and waxing larger areas can be a bit cumbersome. |
| Waterproof Sprays | Simple to apply, available in multiple formulations, and delivers fast results. | Reapplication may be needed over time, and certain sprays can leave a sticky residue. |
| Acrylic Coating | Offers a durable and flexible layer that can be applied in varying thicknesses. | May need several coats and can peel away over time with excessive bending. |
| Lamination | Creates a smooth and durable waterproof surface that protects against dirt and stains. | Requires laminating equipment and may be less flexible than other methods. |
| PVA Glue | More affordable than other waterproof materials, easy to apply with a roller or brush for DIY projects, and non-toxic, making it safe for homes with pets and children. | Degrades easily when exposed to heat and has a long drying time. |
| Silicone Coatings | Extremely durable and waterproof, with resistance to high temperatures. | Can be challenging to apply evenly and is more expensive compared to other methods. |
| Fiberglass Resin | Offers robust and durable waterproofing, creating a hard, long-lasting surface. | Requires adequate ventilation, and the application process can be messy and potentially toxic. |
This comparison table will help you decide which cardboard waterproofing method you should use.
Top 3 Tips for Effective Cardboard Waterproofing
Each cardboard waterproofing method has its pros. So, each method works well in different situations. Below are some tips for ensuring waterproofing lasts:
Tip 1: Apply Extra Coats
Extra layers of coatings make the cardboard even stronger.
Tip 2: Dry Each Layer Fully
Give each coat proper time to dry before adding another.
Tip 3: Use Cardboard Indoors
Waterproofed cardboard remains durable for longer when kept out of heavy rain. By following these tips, your cardboard will stay in top shape for longer!
Final Thoughts!
Hope you have found the relevant information regarding how to make waterproof cardboard. We have discussed the best practical ways to protect cardboard from moisture and make it long-lasting.
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Our team also offers free shipping, the lowest MOQs, the fastest turnaround, and wholesale or bulk rates. Get in touch with us to order sturdy and leakproof cardboard packaging with all essential branding elements. Stay with us to learn everything about cardboard and its waterproofing qualities. Ready to try these methods? Pick your favorite technique and start waterproofing today!
