To waterproof an outdoor storage box, you can follow these steps:
- Clean the box: Remove any dirt, dust, or debris from the surface of the box. Use a brush or cloth to thoroughly clean the inside and outside of the box.
- Fill gaps and cracks: Inspect the storage box for any gaps, cracks, or holes. Fill them using an appropriate waterproof sealant or caulk. Ensure that the sealant is completely dry before proceeding to the next step.
- Apply weatherproof tape: Use weatherproof tape to seal the seams and edges of the storage box. This tape will create an additional barrier against water entry. Apply the tape carefully, making sure it adheres tightly to the surface.
- Use a waterproofing spray: Purchase a waterproofing spray or sealant specifically designed for outdoor use. Spray the entire surface of the storage box, including the lid, with the waterproofing product. Apply a generous, even coat to ensure maximum protection. Make sure to follow the manufacturer's instructions carefully.
- Apply additional coats: If required, apply additional coats of the waterproofing spray or sealant. This will enhance the effectiveness of the waterproofing solution and provide extra protection against moisture.
- Test for waterproofing: After allowing sufficient drying time as recommended by the waterproofing product's instructions, test the box for waterproofing. Pour a small amount of water onto the surface of the box and observe if it beads up and rolls off or if it seeps through. If water seeps through, additional coats of the waterproofing product may be needed.
- Maintain the waterproofing: Over time, the waterproofing properties may fade. Regularly inspect the storage box for any signs of damage or wear. If needed, reapply the waterproofing spray or sealant to maintain its water resistance.
Remember, it is essential to choose the appropriate waterproofing products suitable for the material of your storage box. Follow the steps carefully to ensure that your outdoor storage box remains protected from moisture and keeps your belongings safe and dry.
Best Outdoor Storage Boxes in 2025
1
Rating is 5 out of 5
YITAHOME 100 Gallon Large Resin Deck Box Outdoor Storage Boxes for Patio Furniture, Outdoor Cushions, Garden Tools and Pool Supplies-Waterproof,Lockable (Black)
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EXTRA LARGE SPACE- Our outdoor storage box has a storage capacity of 100 gallons and total dimensions of 47.6"L x 21.2"W x 24.8"H.
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HIGHLY DURABLE- Structured with waterproof poly resin that prevents fading and rusting; Will keep your box’s shiny new look for years to come.
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VERSATILE STORAGE- Can be used indoors or outdoors to store patio furniture cushions, gardening tools, outdoor supplies, and pool accessories; Lockable lid safely protects your items.
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FUNCTIONAL DESIGN- The lid flips open for easy access to your items; Designed with ergonomic side handles so it’s easy to carry around.
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EXTRA SEATING- Provides comfortable bench seating with a weight capacity of 440 lbs.; can be easily assembled.
2
Rating is 4.9 out of 5
Homall 100 Gallon Large Resin Deck Box Waterproof Outdoor Storage with Padlock Indoor Outdoor Organization and Storage Container for Patio Furniture Cushions, Pool Toys, Garden Tools (Black)
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All-Weather-Resistant: Made of waterproof and weather-resistant polyester resin. The high quality material prevents fading, rusting, peeling and bending, and provides a new appearance even after long-term use.
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Safe air rod: The deck box is equipped with air rods on the left and right sides for easy opening and closing, and keeping the lid in place. The air rod design can effectively prevent the box in the closure of the pinch your hand.
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Easy installation: The box consists of six resin plates and two air rods. You only need to assemble the six plates into the box, and then use the screws to put the air rod on. Two people can complete the assembly in ten minutes.
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Super practical large size: The storage box with modern rattan pattern can perfectly decorate your garden, pool, deck, under the porch. The extra large size can store outdoor furniture cushions, pool toys, Garden Tools , you don't have to struggle to take these back to the house.
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Multifunctional design: The deck box lid has a padlock design can ensure the safety of your belongings. Besides, this box is big enough that you can sit on it for a while when you don't have enough seats or are tired.
3
Rating is 4.8 out of 5
Devoko 85 Gallon Deck Box Lockable Resin Outdoor Storage Box waterproof Outdoor Container for Patio Furniture Cushions, Pillow and Pool Toys (Black)
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Ideal Storage: 46'' x 21.3'' x 23.3''. The large-capacity outdoor storage box can hold 85 gallons and is suitable for storing outdoor furniture Cushion, swimming pool toys, garden tools, etc.
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Resin Material: The deck storage box made of resin material has excellent ultraviolet protection and waterproof ability, is suitable for all-weather outdoor environment, and has a service life of many years.
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Imitation Wood Surface: This outdoor deck box with Imitation board appearance is an excellent organizer in outdoor life. It is suitable for matching various outdoor items and will become a perfect decoration for the deck or backyard.
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Careful Design: The lockable deck box can protect the safety of internal articles. The double hydraulic gas rod design makes the top of box open easily or close slowly. The side handle provides convenience for moving.
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Extra Seats: The multi-purpose outside storage box can be used as additional seats according to your needs. The waterproof outdoor storage bench can bear 350 pounds, and can bear the normal weight of up to 2 adults.
4
Rating is 4.7 out of 5
Devoko 100 Gallon Waterproof Large Resin Deck Box Indoor Outdoor Lockable Storage Container for Patio Furniture Cushions, Toys and Garden Tools (100 Gallon, Black)
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-Chic Design: This all-weather wicker plastic storage box with modern rattan pattern design, which is a great decoration for deck, garden, yard, porch and poolside.
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-Large Storage Space: This deck box has a storage capacity of 100 Gallon with totally dimensions: 47.8"L x 21.4"W x 24.6"H. It will provide enough room to store all your belongings for indoors and outdoors, such as pillows, toys, tools and equipments.
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-Strong and Durable: Made of weather-resistant and waterproof poly resin that prevent fading, rusting, peeling and bending, which can keeps looking new for long time using.
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-Extra Bench Seating: This storage box provides two comfortable seatings( weight capacity of 500 lbs), which can be used as a bench in your home. With two side handles, you can easily to move arround.
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-Functional Design: Equipped with two gas rods for easy opening and slowly closing, and prevents hands from getting clamped. Lockable lid will keep your belongings safe and secure.
5
Rating is 4.6 out of 5
Keter Marvel Plus 71 Gallon Resin Deck Box-Organization and Storage for Patio Furniture Outdoor Cushions, Throw Pillows, Garden Tools and Pool Toys, Graphite
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DIMENSIONS: Exterior: 45. 9 in. W x 17. 4 in. D x 22. 2 in. H / Interior: 44. 6 in. W x 15. 6 in. D x 20 in. H
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LARGE CAPACITY: Large storage capacity can hold up to 71 gallons
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RESIN CONSTRUCTION: It's made out of all weather-resistant resin with an appealing wood-like texture
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EASY TO MOVE: Complete with built-in handles and rollers for mobility
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DURABLE AND STRONG: weather-resistant polypropylene construction prevents rusting, peeling and denting
6
Rating is 4.5 out of 5
Cosco Outdoor Patio Deck Storage Box, Extra Large, 180 Gallons, Black and Charcoal
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XL 180 gallon storage capacity is ideal for items such as large cushions, garden tools, sports equipment, and pool supplies
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Protects contents from thieves, weather, nosy neighbors, and stray animals. Keep property private, hidden, and secure
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Durable steel frame lockable lid protects against backyard patio pirates. Hinge can hold lid open without falling on your fingers
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Waterproof design with UV-protected, double wall panels. Features charcoal frame and black lid that will compliment a wide range of home exteriors
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Ideal dimensions for maximizing storage space. Exterior: 57.71" W x 27.95" D x 29.5" H & Interior: 54.5" W x 25.5" D x 27.5" H
7
Rating is 4.4 out of 5
Flamaker Resin Deck Box 120 Gallon Waterproof Large Deck Boxes Plus Outdoor Indoor Storage Box Imitation Wood Resin for Patio Furniture Garden Tools and Pool,Dark Black
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[High Quality Selection] Deck box is made of high-quality resin materials, imitation wood surface design, waterproof, but also anti-oxidation and prevent fading, effectively prolong the service life of the storage box
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[120 Gallons of Storage Space] 120 gallons of large storage box space, you can put your planting tools, pool equipment and children's toys in it, with armrests on both sides, you can move it anywhere.
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[Safety Design] The storage box cover and the box are connected by hydraulic rods, which reduces the speed of opening and closing, ensuring the safety of children, and can be locked to ensure the safety of property.
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[As a Seat] 56"*26.7"*24" Outdoor storage box large size, not only the storage capacity is guaranteed, but the storage cover can be used as a seat, which can be used by up to 2 people.
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[Installation] Deck storage box comes with installation instructions and all accessories required for installation, the installation is simple. If you have any questions, please feel free to contact us.
8
Rating is 4.3 out of 5
YITAHOME 120 Gallon Large Deck Box w/Flexible Divider & Storage Net, Resin Outdoor Storage Boxes, Waterproof Cushion Storage Bench for Patio, Pool Supplies, Garden Tools - Lockable, Dark Grey
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OUTDOOR STORAGE BOX- The upgraded large deck box for indoor / outdoor settings with exterior dimensions of 56.2"L x 26.5"W x 23.8"H, and interior size of 53.1"L x 23.1"W x 21.6"H. The top cover provides an additional mesh pocket for storing small items
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LARGE STORAGE SPACE- 120-gallon capacity results in a roomy storage solution for your garden tools, pool supplies, sporting equipment, etc., on patio, deck, or porch; Featuring 661lbs. weight capacity, this waterproof outdoor storage box can double as an extra table or patio bench to accommodate two adults
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FUNCTIONAL DIVIDER ADD-ON- Distinct built-in divider design works with two accompanying slots for flexible position adjustment; Add or detach at will for separate partitions or to release additional storage space
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ALL-WEATHER GUARD- Weatherproof poly resin combines beauty and utility, granting this patio deck storage protection against water, UV, fading, rusting, peeling, and bending; Requires little to no maintenance for years to come
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EASY TO USE- Hydraulic hinge provides smooth, anti-slam closing; It’s easy to reposition thanks to the built-in handles, and secure your items with lockable lid; Two people assembly in 10 mins with tools included
Can a regular storage box be used outdoors without waterproofing?
A regular storage box is typically not designed to withstand outdoor elements and may not be waterproof. Without waterproofing, the box may allow water to seep in, potentially damaging the items inside. Over time, exposure to rain, moisture, and other weather conditions can also cause the box to deteriorate. Thus, it is generally recommended to use a specifically designed outdoor storage box or waterproof the regular storage box before using it outdoors.
How do you clean and maintain a waterproofed outdoor storage box?
To clean and maintain a waterproofed outdoor storage box, follow these steps:
- Clear out the storage box: Empty the box and remove all items inside. This will make it easier to clean and access all areas of the box.
- Pre-rinse the box: Use a hose or bucket of water to rinse off any loose dirt, leaves, or debris from the storage box. For stubborn dirt or stains, you may use a soft brush or sponge to scrub it off gently.
- Prepare a cleaning solution: Fill a bucket with warm water and add a mild detergent or dish soap. Avoid using harsh chemicals or bleach as they may damage the waterproofing materials.
- Clean the box: Dip a soft cloth or sponge into the cleaning solution and scrub the inside and outside surfaces of the box. Pay special attention to any stains or sticky spots. Rinse the cloth or sponge frequently in the cleaning solution to ensure effective cleaning.
- Rinse thoroughly: Once you have cleaned the entire storage box, use clean water or a hose to thoroughly rinse off any soap residue. Make sure to rinse all corners, edges, and crevices to remove any remaining dirt or cleaning solution.
- Dry the storage box: Leave the storage box in a well-ventilated area to air dry completely. Ensure there is proper airflow to prevent moisture buildup, which could lead to mold or mildew growth.
- Apply a waterproofing sealant (if needed): If you notice that the waterproofing has worn off or the box no longer repels water, you may need to reapply a waterproofing sealant. Consult the manufacturer's instructions to find the appropriate sealant for your storage box and follow the application guidelines carefully.
- Regular maintenance: To keep your outdoor storage box in good condition, periodically check for any signs of damage or wear. If you spot any cracks, gaps, or other issues, repair them promptly to restore the box's waterproofing. Additionally, regularly remove any debris or leaves that may accumulate around the box to maintain proper drainage and prevent moisture buildup.
By following these steps, you can ensure that your waterproofed outdoor storage box remains clean, protected, and in optimal condition for longer use.
What are some signs that indicate an outdoor storage box needs to be waterproofed?
Some signs that indicate an outdoor storage box needs to be waterproofed include:
- Water damage or staining on the box's exterior: If you notice watermarks or dark stains on the surface of the storage box, it indicates that water has penetrated into the box's interior.
- Damp or moist items inside the box: If the items stored inside the box feel damp or moist, it suggests that water has seeped in, rendering the box ineffective at keeping water out.
- Mold or mildew growth: Mold and mildew thrive in moist environments, so if you notice any signs of mold or mildew on the exterior or interior of the storage box, it indicates a moisture problem.
- Rust or corrosion on metal components: If metal components on the outdoor storage box, such as locks, hinges, or handles, show signs of rust or corrosion, it suggests that water has been able to penetrate the box and reach these metal parts.
- Musty smell: A musty or moldy smell emanating from the storage box is a strong indicator of water infiltration and subsequent mold growth.
- Warping or deterioration of the box material: If the box material, whether plastic, wood, or metal, starts to show signs of warping, cracking, peeling, or rotting, it suggests that moisture has compromised the box's integrity.
- Increased frequency of leaks or water pooling: If you observe that water is consistently leaking or pooling on top of or around the storage box, it is a clear indication that waterproofing measures need to be taken.
Remember, even if none of these signs are visible, it's generally a good practice to waterproof outdoor storage boxes as a preventive measure to protect your valuable items from potential water damage.
