How to re-waterproof jacket DWR coating effectively?

Understanding DWR and Its Importance

Your favorite waterproof jacket likely owes its initial ability to shed water to a Durable Water Repellent (DWR) coating. This invisible polymer layer is applied to the fabric’s exterior, causing water to bead up and roll off rather than soaking in. While the internal membrane (like Gore-Tex or eVent) provides the true waterproofing, the DWR prevents the outer fabric from ‘wetting out,’ which can make your jacket feel heavy, clammy, and less breathable.

Over time, dirt, oils, abrasion, and repeated washing can degrade the DWR coating. This leads to the fabric absorbing water, which compromises breathability and overall comfort, even if the underlying membrane still keeps you dry. Fortunately, restoring your jacket’s DWR is a straightforward process that can significantly extend its performance and lifespan.

When to Re-waterproof Your Jacket

The clearest sign that your DWR needs a refresh is when water no longer beads up and rolls off the fabric. Instead, it starts to create dark, wet patches, a phenomenon known as ‘wetting out.’ You might also notice that your jacket feels heavier when wet, or that you feel clammy inside, even if you’re not sweating excessively. A simple test is to spray a little water on the jacket’s surface; if it soaks in rather than beading, it’s time to re-waterproof.

Step-by-Step Guide to Re-waterproofing

Step 1: Clean Your Jacket Thoroughly

Before applying any DWR treatment, it’s crucial to clean your jacket. Dirt, oils, and residues from regular detergents can inhibit the DWR from bonding effectively. Always check your jacket’s care label, but generally, machine wash it on a gentle cycle with warm water (not hot) using a technical fabric cleaner specifically designed for waterproof breathable garments. Avoid using conventional detergents, fabric softeners, or bleach, as these can strip DWR and clog the fabric’s pores.

Run an extra rinse cycle to ensure all cleaner residue is removed. If your washing machine has a dedicated ‘outdoor’ or ‘waterproof’ setting, use that. After washing, do not wring or twist the jacket.

Step 2: Choose Your DWR Product

There are two primary types of DWR treatments: wash-in and spray-on.

• Wash-in Treatments: These are added to your washing machine during the final rinse cycle. They treat both the outer fabric and any internal lining, which can be beneficial for insulation but less ideal if your jacket has moisture-wicking properties on the inside that you don’t want to compromise.
• Spray-on Treatments: Applied directly to the jacket’s exterior, these offer more control, allowing you to treat only the outer fabric. This is often preferred for jackets with specific internal liners or those that only need spot treatment.

Both types are effective; the choice often comes down to personal preference and the specific garment. Always opt for an environmentally friendly, PFC-free DWR product if possible.

Step 3: Apply the DWR Treatment

For Wash-in Treatments:

Follow the product’s instructions carefully. Typically, you’ll add the specified amount of DWR solution to your washing machine’s detergent dispenser or directly to the drum with the clean jacket. Run a delicate cycle with warm water. Ensure the jacket is rinsed thoroughly to remove excess product.

For Spray-on Treatments:

Lay your clean, damp jacket flat or hang it on a hanger. Spray the DWR evenly over the entire exterior surface from about 6-8 inches away. Pay extra attention to high-wear areas like shoulders, elbows, and cuffs. Wipe off any excess drips with a clean cloth immediately to prevent streaking or residue buildup.

Step 4: Dry and Cure for Best Results

Many DWR treatments require heat to ‘cure’ and fully activate the water repellency. After applying the treatment, tumble dry your jacket on a low heat setting. If your jacket’s care label permits, a short cycle (20-30 minutes) in a dryer can help activate the DWR. If tumble drying is not an option, air dry your jacket completely and then gently iron it on a low, synthetic setting (without steam) with a towel between the iron and the fabric, or use a hairdryer on low heat. Always refer to both the DWR product’s instructions and your jacket’s care label for specific drying recommendations.

Tips for Maintaining Your Jacket’s Water Repellency

• Regular Cleaning: Clean your jacket more frequently than you might think. Dirt and body oils are the primary enemies of DWR.
• Avoid Harsh Chemicals: Stick to technical cleaners designed for outdoor gear. Regular detergents can leave residues that hinder DWR function.
• Minimize Abrasion: Heavy backpacks or constant rubbing can wear down the DWR in specific areas.
• Proper Storage: Store your jacket in a clean, dry place away from direct sunlight.

Conclusion

Re-waterproofing your jacket’s DWR coating is an essential part of maintaining your outdoor gear. By following these steps, you can restore your jacket’s performance, ensuring it continues to shed water effectively, keep you comfortable, and stand up to the elements for many adventures to come. Don’t let a ‘wetting out’ jacket cut your outdoor pursuits short – give it the care it deserves!