How to Proof a Winter Coat or Parka

A winter coat becomes water-repellent – not waterproof

It helps to set the right expectation before you start. A wool coat or woven parka keeps water out with a surface finish, not a membrane – it will never be a waterproof shell you can stand out in a downpour with. The goal is for rain and wet snow to bead and roll off, for the garment to dry faster, and for road salt and dirt not to settle as easily. Wool also has a natural, oil-based water resistance of its own, and a proofer boosts it. That buys you time to get indoors without the coat soaking through.

Clean or brush the coat first

Proofing only bonds to clean fabric, so salt, dirt and stains must go before you spray.

1. Empty the pockets, do up buttons and zips, and brush off loose dirt with a clothes brush.
2. Check the care label: many wool coats are marked dry-clean only – then they should not be washed at home.
3. Remove salt marks and stains gently with a cloth dampened in cold water, and let the coat dry fully.
4. If the label allows washing, use a gentle wool detergent – otherwise stick to brushing and spot-cleaning.

Choose the right proofer for natural fibres

Not all outerwear should get the same product. For wool and woven coats, a spray made for natural fibres works best:

• Spray beats wash-in on a lined, tailored coat – so you avoid treating the lining, canvas front and shoulder pads.
• Choose a product marked for wool or natural fibres, not necessarily a heavy technical DWR made for shell jackets.
• Always test on a hidden spot first – such as the inside of a lapel – to check the colour does not change.

Apply evenly and let it dry

Hang the coat on a hanger and spray outdoors or in a well-ventilated room. Hold the spray a little away from the fabric and go evenly over the whole surface with lightly overlapping passes, with extra attention on the shoulders and upper back where rain and snow land, and on the lower body and hem where salt and slush splash up. Wipe off any runs with a cloth. Let the coat air-dry fully; some products set better with a little gentle warmth or simply time – check the product. Finish with the drop test on the shoulders: if water beads, the finish has taken.

Road salt and wet snow – the Norwegian winter problem

The biggest test for a winter coat in Norway is not rain, but road salt and wet snow. Salt draws in moisture and leaves white tide-lines along the hem and lower part of the garment, and wet snow melts and soaks into the fabric. First brush off dry salt, wipe over with a cloth dampened in cold water, and let the garment dry before you re-proof the most exposed zones – typically the lower panels, hem and shoulders. A well-proofed surface means slush and salt brush off more easily, and the coat stays drier through the winter.

When should the winter coat go to professionals?

Wool and tailored winter coats are easy to ruin at home. If the coat is marked dry-clean only, has a lining, a structured shape or sewn-in detailing, if salt tide-lines have set into the fabric, or if you are unsure about the fibre and colour, you can send it to us. We clean and re-proof according to the garment and its care label, so the treatment is correct and gentle. If the coat also needs a repair – a button, a lining or a seam – we handle it in the same round. You order online, and you see the price before you order.

Frequently asked questions