Why Your Waterproof Jacket Stops Beading Water
You bought a quality waterproof softshell or outer jacket. For the first few months, water beaded beautifully off the surface. Then, after several washes, you noticed the water stopped beading and started soaking in. The jacket started to feel heavy and wet rather than dry and water-repellent. Has the waterproofing failed?
Usually not. What’s most likely happened is that the Durable Water Repellent (DWR) coating on the outer fabric surface has been depleted or contaminated. The waterproof membrane inside the garment is typically still intact and functioning — it’s the outer surface treatment that needs attention.
What DWR Does and Why It Degrades
DWR is a chemical treatment applied to the outer surface of waterproof workwear. It causes water to bead and roll off the surface rather than saturating the outer fabric layer. When the outer layer stays dry, the breathable membrane inside remains effective — it can pass moisture vapour (perspiration) outward while preventing liquid water from penetrating inward.
When DWR degrades, the outer fabric “wets out” — it absorbs water rather than repelling it. The garment feels cold and heavy. The membrane is often still waterproof, but the garment no longer breathes effectively because the saturated outer layer blocks vapour transfer.
How to Restore DWR Performance
Step 1 — Clean properly: DWR failure is sometimes caused by contamination (oil, body oils, detergent residue) rather than genuine coating depletion. Wash the garment with a technical fabric cleaner (Nikwax Tech Wash or equivalent) rather than standard detergent. This removes contamination without further stripping the DWR.
Step 2 — Heat activation: After washing and while the garment is still damp, tumble dry on low heat for 20 minutes. Heat reactivates residual DWR in the fabric. Test the bead behaviour after drying — many garments recover significantly from heat activation alone.
Step 3 — Re-proof if needed: If the garment still doesn’t bead water after cleaning and heat activation, apply a DWR re-proofing spray or wash-in solution (Nikwax TX.Direct is the industry standard). Apply, allow to absorb, then tumble dry or iron on low heat to cure the treatment.
How Often to Re-Proof
For workwear garments washed weekly, re-proofing every three to six months maintains optimal DWR performance. Browse our workwear shop or contact us for garment-specific care advice.