To wash a waterproof jacket, close every zip and flap, machine wash it on a warm (30–40°C / 86–104°F) synthetic cycle with a small dose of liquid technical cleaner and no fabric softener or powder, rinse twice, then tumble dry on low to medium heat for about 20 minutes to reactivate the water repellent finish. If water still soaks into the face fabric instead of beading, reproof it with a wash-in or spray-on DWR treatment. Always check the care label first, because it overrides any general advice.
Many people avoid washing their rain jacket because they think it will ruin the waterproofing. The opposite is true. Dirt, sunscreen and body oil are what make a jacket feel like it is leaking, and regular washing is the single best way to restore DWR performance and breathability.
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Why washing fixes a “leaking” jacket
Most waterproof jackets have two layers of defence. The membrane or coating inside is the actual waterproof barrier. The outer face fabric is treated with a durable water repellent (DWR) that makes rain bead and roll off. When the DWR is clogged with grime, the face fabric soaks up water, a problem called wetting out. The membrane usually still blocks the rain, but a soaked outer layer stops sweat vapour escaping, so condensation builds inside and it feels like a leak. Clean the jacket and the DWR often starts working again.
What you need
- A technical cleaner made for waterproof fabrics (for example Nikwax Tech Wash or a Gore-approved liquid detergent), or a small amount of plain liquid detergent with no additives.
- A front-loading washer, or a top loader without a central agitator. Agitators can stress seam tape.
- Optional: a reproofing product, either wash-in (such as Nikwax TX.Direct Wash-In) or spray-on.
- A tumble dryer with a low or medium setting, or an iron with a no-steam warm setting.
Step-by-step: washing a waterproof jacket
Step 1: Read the care label
Labels tell you the maximum water temperature and whether tumble drying is allowed. Some fabrics, such as Gore-Tex Shakedry, have no outer textile and must not be tumble dried. Old jackets with tired seam tape may also need gentler handling.
Step 2: Clean out the detergent drawer
Residue from regular detergent and softener in the dispenser can contaminate the wash. Wipe it out or run a short empty rinse cycle first. Detergent residue leaves a water-attracting film on fabric that masks the DWR, which defeats the point.
Step 3: Prepare the jacket
Empty all pockets. Close the main zip, pocket zips and pit zips, and fasten hook-and-loop cuffs and storm flaps so they do not snag other fabric. Loosen drawcords so dirt can rinse out.
Step 4: Wash warm with liquid cleaner
Wash only one or two garments at a time. Gore recommends 40°C (105°F) with a small amount of liquid detergent; Nikwax specifies a 30°C synthetic cycle with 100 ml of Tech Wash in soft water or 150 ml in medium or hard water. Never use powder detergent, fabric softener, bleach or stain removers. Powder does not rinse fully and softener coats the fibres, both of which ruin water repellency.
Step 5: Rinse twice, spin slowly
An extra rinse removes the last of the cleaner. Use a slow or low spin to reduce stress on seams and laminate.
Step 6: Dry with gentle heat to reactivate the DWR
Tumble dry on warm or medium until dry, then run another 20 minutes. Heat helps the DWR molecules realign so water beads again. If you cannot use a dryer, line dry, then iron on a warm, no-steam setting with a towel between the iron and the jacket.
Step 7: Do the bead test
Sprinkle water on the shoulders and forearms, the areas that wear fastest. If it beads and rolls off, you are done. If it darkens the fabric and spreads, reproof.
How to reproof a rain jacket
| Method | Best for | Dose / process | Drying |
|---|---|---|---|
| Wash-in (e.g. Nikwax TX.Direct Wash-In) | Single-layer shells and jackets without a wicking lining | Front loader: 100 ml per garment, max 2 garments, 30°C synthetic, slow spin. Top loader: 300 ml, max 3 garments | Air dry, or low tumble if label allows; no heat needed |
| Spray-on | Jackets with a mesh or wicking lining; targeting high-wear areas | Spray evenly on the clean, still-wet jacket from about 15 cm (6 in), wait 4–5 minutes, wipe off excess | Air dry or low tumble per product label |
| Heat only | Newer jackets where DWR is clogged but intact | Wash, then 20 minutes extra in the dryer | Warm, gentle cycle |
| By hand | No machine available | 1 garment in 7.5 L hand-hot water with 100 ml TX.Direct, soak 5 minutes, agitate, rinse cold | Air dry |
Do not dry the jacket between washing and applying a wash-in treatment; the product is designed to go on wet fabric. Spray-on works better when you want to treat only the outside, because wash-in products coat linings too and can make them hold moisture.
How often to wash and reproof
| Use pattern | Wash | Reproof |
|---|---|---|
| Daily commuting | Every 4–6 weeks | 1–2 times a year |
| Weekend hiking | 2–3 times a season | Once a year or when beading stops |
| Multi-day backpacking | After every long trip | When the bead test fails after washing |
| Occasional use | At the end of each season | Every 2–3 years |
Wash first, reproof second. Each extra DWR coat adds a little stiffness and cost, so only reproof when washing and heat no longer bring the beading back.
Common mistakes that shorten a jacket’s life
- Using fabric softener. It leaves a film that attracts water and blocks breathability.
- Storing it dirty and damp. Mildew and body oil degrade PU coatings and laminate adhesive. Dry fully and hang it up.
- High-heat drying. Heat beyond medium can soften seam tape and cause delamination, especially on older jackets.
- Dry cleaning. Solvents can strip DWR and damage membranes unless the label specifically allows it.
- Never washing at all. Clogged membranes lose breathability and coatings break down faster when coated in skin oils.
When washing will not help
If water comes through as distinct wet patches on the inside, rather than general dampness, check for peeling seam tape, bubbling between layers (delamination) or flaking inner coating. These are structural failures. Seam tape can sometimes be patched with seam sealer, but widespread delamination usually means the jacket has reached the end of its life. Many brands offer repair services worth contacting before you replace it.
