Do I need a weatherproof padlock? You want security outdoors, but what about the weather? Will a standard security padlock stand up to extremes of sun, wind and rain or is a weatherproof option a better investment? It all comes down to where the lock will be used. What are weatherproof padlocks? A fully weatherproof padlock is made entirely from stainless and non-corrosive materials. They are often called marine padlocks and are suitable for saline and extreme environments. Security considerations Standard padlocks have a hardened-steel shackle specifically to ward off attack. The materials in weatherproof padlocks are softer and are therefore easier to saw, cut or bolt crop. It’s the environment that matters For general outdoor use a standard padlock with hardened shackle provides better security. The shackle may discolor over time but the corrosion is external and will not impact the locking mechanism. If the padlock will be used for an extended period by the sea, on a boat, underwater or in other extreme environments, a weatherproof, or marine-grade, padlock will stand up better to the elements. Added protection Like all padlocks, weatherproof padlocks can be affected by grit, sand and dirt. Consider a padlock with a full plastic jacket and guarded keyway. These features provide added protection to internal mechanisms that will jam if they rust or corrode, making the lock unusable. Insist on weather resistant If you choose a standard padlock, look for one with a weather resistant rating. Purpose-designed weather resistant locks are made from materials such as stainless steel, brass and phosphor bronze. Be aware of cheaper versions that encase a brass or laminated lock in a plastic jacket. While the exterior won’t be unduly affected by the weather there is a risk the internal workings are steel and will rust.