I once walked three blocks to a job interview in canvas sneakers during an unexpected downpour. By the time I arrived, my socks made squishing sounds and my shoes had darkened two full shades. I got the job somehow. I also bought waterproofing spray that same afternoon.

The trick with waterproofing shoes isn’t buying the right product — it’s applying it before you need it. By the time the forecast says rain, you’re already too late for the best results.

Different shoes, different treatments

Leather boots and dress shoes: Use a wax-based waterproofing product. The wax fills the pores in the leather and creates a barrier water can’t penetrate. Apply in thin layers with a cloth, let dry, buff. Two thin coats beat one thick one every time.

Canvas and fabric sneakers: Silicone spray is your friend. Hold the can about six inches away and spray evenly until the fabric looks damp but not soaked. Let dry completely — at least a few hours, ideally overnight — before wearing.

Suede: Special suede waterproofing spray only. Regular silicone spray will mat down the nap and ruin the texture. Suede sprays are designed to protect without changing the look or feel.

The application mistakes everyone makes

Not cleaning first. Waterproofing over dirt seals the dirt in. Wipe your shoes clean with a damp cloth and let them dry completely before applying anything.

Spraying too close. You want an even mist, not a wet spot. Six to eight inches away, moving the can continuously. If the shoe looks soaked, you’re too close or holding still too long.

One coat and done. Most products need two thin coats with drying time in between. Read the can. The second coat fills gaps the first one missed.

How long does it last

Silicone sprays wear off after a few weeks of regular walking. Reapply monthly during rainy season. Wax on leather lasts longer — a couple of months — because it soaks in rather than sitting on the surface.

You’ll know it’s time to reapply when water stops beading up and starts soaking in. Beads of water on the surface = protection is working. Dark wet spots = time to re-treat.