100 Gallon Outdoor Storage Box - Large Water Resistant Deck Box

Our review finds the 100 gallon outdoor storage box best for homeowners and renters who need a roomy, weatherproof spot for cushions, tools, and pool accessories; the single biggest reason to buy is its combination of large capacity and durable resin construction that keeps contents dry and resists fading. In this review the box proved versatile enough for patio and indoor use, with a lid that doubles as a bench and hydraulic struts that make opening safer and easier for most users.

Key Features

• Spacious Storage: The 100-gallon interior provides a practical footprint for long seat cushions, pool toys, and gardening gear without taking excessive deck space.
• Weather-Resistant Resin: Waterproof, rust-proof, UV-resistant, and fade-proof resin construction protects stored items from sun and rain over time.
• Lockable Design: A lock-ready lid keeps items secure when left outdoors or in shared spaces, adding peace of mind for valuable accessories.
• Safe Opening: Hydraulic struts ensure a smooth, slow lid motion that reduces the risk of slamming and makes access easier.
• Extra Seating: The box supports up to 485 lb and can double as a bench for extra patio seating without looking out of place.

Who It's For

The storage box is ideal for patio and backyard owners who need a durable, mid-to-large capacity solution for cushions, pool supplies, small tools, and toys. Its weather-resistant resin and UV protection make it a good match for year-round outdoor use in varied climate conditions.

It may be less suitable for buyers who need built-in shelving, rigid metal security, or very frequent relocation; while it has dual handles and is movable, it is still best placed in a semi-permanent spot and assembled with two people if you prefer an easier build.

Pros & Cons

Pros

• Large internal capacity fits multiple seat cushions and medium-size equipment comfortably.
• Durable resin construction stands up to rain and sun without rusting or fading.
• Hydraulic struts and a lock-ready lid add safety and security for everyday outdoor use.

Cons

• Assembly is mixed in reviews and can be tricky alone, so a helper is recommended.
• Some users report concerns about potential cracks over long service in harsh conditions.

Specifications

Our Verdict

For anyone seeking a large, weatherproof deck box that doubles as seating, this 100 gallon resin storage box is a practical, value-minded choice; it offers roomy storage, UV and waterproof protection, and useful features like hydraulic struts and a lock-ready lid. Buyers who want simple, durable outdoor storage and occasional bench seating will find it good value, though assembly is easier with two people.

Frequently Asked Questions

Is this box waterproof?
Yes, the resin construction is described as waterproof and helps keep stored items dry in rain.

Can it be used as a bench?
Yes, the top supports up to 485 lb and can function as extra patio seating.

How hard is assembly?
Assembly experiences vary; many find it straightforward, but some report it is easier with a second person and can take 15-30 minutes.