10 Best Weatherproof Padlocks 2025 in the United States

The Master Lock Magnum Heavy Duty Outdoor Padlock is robust and well-suited for outdoor use. Its Dual Armor construction, featuring a laminated steel lock body with a weather-resistant cover, enhances durability. The shackle is made from Tough-Cut octagonal boron-carbide, making it significantly harder and more resistant to cutting compared to regular hardened steel shackles. This padlock's 4-pin cylinder and dual ball bearing locking mechanism offer increased resistance to picking and prying, providing added security for your valuables stored outdoors.

The covered keyway and shackle offer additional protection against the elements, making it truly weatherproof and suitable for outdoor storage, fences, gates, and sheds. The lock body is reasonably sized at 1-7/8 inches wide, and the extended shackle provides flexibility for various applications. The 2-pack includes two keys that can open both locks, which is convenient for users managing multiple access points.

However, the padlock's weight (1.12 pounds) may be considered heavy by some users, and it might not fit all types of storage units or lockers without careful measurement. Despite these minor drawbacks, the padlock performs well in terms of security and durability.

The Master Lock Magnum Heavy Duty Outdoor Padlock with Key, model M115XDLF, is designed for robust outdoor use. It features a laminated steel body with a weather-resistant cover, enhancing its durability against harsh weather. The shackle is made from Tough-Cut octagonal boron-carbide, which is 50% harder than typical hardened steel, offering a high level of cut resistance—ideal for securing fences, gates, sheds, and more.

The 4-pin cylinder and dual ball bearing locking mechanism increase protection against picking and prying attempts, while a covered keyway and shackle add extra weather protection. The padlock's dimensions are compact with a 1-7/8 inch wide body and a 5/16 inch diameter shackle, providing flexibility for various applications. It includes one lock and two keys for convenience.

The primary material listed as plastic might be confusing, as the core body is steel with plastic covering for weather resistance. Weighing only 3.2 ounces, it is lightweight, which may or may not be a concern depending on the user's preference. It ranks #2 in Keyed Padlocks, highlighting its popularity and reliability as an outdoor locking solution. It’s important to measure your door's backset, cross bore, and thickness to ensure proper fitment.

The Master Lock Covered Padlocks (141T) are a solid choice for anyone needing reliable weatherproof locks for outdoor use, such as securing sheds, gates, or storage lockers. One of the standout features of these padlocks is their construction; made with a black vinyl-covered aluminum body, they resist scratches and corrosion, while the hardened steel shackle offers excellent cut resistance. This combination ensures that the locks will hold up well against the elements, making them ideal for outdoor applications.

Security-wise, the four-pin cylinder and dual locking lever mechanism provide good protection against picking and prying. The locks are not overly large, with a size of 1-9/16 inches (40 mm) in width and a 1/4 inch (6 mm) diameter shackle, making them manageable while still providing adequate security. Each pack includes two padlocks and two matching keys, which is convenient as both locks can be opened with the same key.

However, there are a few downsides to consider. While the locks are fairly lightweight at 4.6 ounces each, some users may prefer a heavier, more robust lock for added peace of mind. Additionally, while the padlocks are weatherproof, they may not be completely impervious to extreme weather conditions, which could potentially impact their long-term durability.