When rain stops beading on your shell and the fabric goes dark and soggy, the jacket usually isn't leaking — its water-repellent finish has worn off. You can restore water repellency at home in an afternoon with a wash, some gentle heat, and a fresh DWR treatment. Here's how to do it properly.

Wetting Out vs. Leaking: Diagnose First

The factory DWR (durable water repellent) finish makes water bead and roll off the face fabric. When it wears away, the outer fabric soaks through and the jacket feels wet, cold, and clammy — even though the waterproof layer underneath is often still fine.

• Dark, saturated patches on shoulders and cuffs mean wetting out. Fixable at home.
• Water actually coming through seams or pooling inside means failed seam tape or a failed membrane or coating — no spray will fix that.
• Clamminess alone is often condensation from blocked breathability: also a DWR problem, also fixable.

Step 1: Wash Away the Dirt

Dirt and body oils flatten a DWR finish; a surprising number of "dead" jackets revive after nothing more than a proper wash.

• Use a technical fabric wash, not regular detergent, and never fabric softener. Detergent residue attracts water — the opposite of what you want.
• Close all zippers and flaps, wash cool on a gentle cycle, and add an extra rinse.
• If you only have regular detergent, run extra rinse cycles afterward — but a technical wash is worth owning.

Step 2: Reactivate the Finish With Gentle Heat

DWR finishes respond to heat. If the care label allows it:

• Tumble dry on low for about 20 minutes, or
• Iron on a low synthetic setting with a cloth between the iron and the jacket.

Then test with a sprinkle of water. If drops bead and roll off, you're done — many jackets need nothing more than wash plus heat.

Step 3: Reapply DWR to Restore Water Repellency

If water still soaks in after cleaning and heat, the finish is genuinely worn away and needs replacing.

• Spray-on DWR goes only on the outer face. It's the better pick for jackets with soft inner liners, and it lets you target high-wear zones like shoulders and forearms. Apply to a clean, damp jacket, spray evenly, and wipe off drips.
• Wash-in DWR treats the whole garment in the machine — even coverage, less effort, but it also coats the inner surface, which can slightly reduce next-to-skin comfort on some jackets.
• Either way, follow the product's directions, then heat-activate again if the label allows. Heat cures most treatments harder.

Keep It Beading Longer

• Wash the jacket regularly; dirt kills DWR faster than rain does.
• Minimize abrasion: pack straps and hip belts grind the finish off shoulders and hips first.
• Expect to reapply once or twice a year with steady use. DWR is a wear item, not a one-time fix.

FAQ

How do I know if it's leaking or just wetting out?

Wetting out shows as dark, soaked face fabric with a clammy feel inside; a true leak puts actual water inside, often along seams. Most "leaking" jackets are only wetting out and can be fixed at home.

Spray-on or wash-in — which should I choose?

Spray-on treats only the outside, so it suits lined jackets and spot work on high-wear zones. Wash-in is easier and more even but coats the inside too. For most technical rain shells, spray-on is the safer default.

The jacket still leaks after washing and reproofing — now what?

Check the seams and the inner coating. Peeling seam tape or a flaking inner surface means the waterproof layer itself has failed, and that's a repair-or-replace decision rather than a treatment problem.