Best way to clean and re-waterproof a GORE-TEX jacket?

Maintaining Your GORE-TEX for Peak Performance

Your GORE-TEX jacket is an investment in comfort and protection against the elements. Over time, however, dirt, oils, sweat, and residues from sunscreen can clog the fabric’s pores and compromise its Durable Water Repellent (DWR) coating. This leads to the fabric ‘wetting out’ – absorbing water instead of shedding it – which diminishes breathability and makes you feel cold and damp. Fortunately, cleaning and re-waterproofing your GORE-TEX jacket is a straightforward process that will restore its performance and extend its lifespan.

Why Cleaning is Crucial for GORE-TEX Performance

The magic of GORE-TEX lies in its microporous membrane, which allows vapor to escape but prevents liquid water from entering. The DWR coating on the fabric’s outer layer causes water to bead up and roll off, protecting the membrane and maintaining breathability. When this DWR coating is compromised by grime, the fabric’s surface becomes hydrophilic (water-attracting), leading to ‘wetting out’. This not only makes you wet but also reduces the fabric’s ability to breathe, as the saturated outer layer blocks the membrane’s function. Regular cleaning reactivates the existing DWR and prepares the fabric for reapplication if needed.

Step-by-Step Guide to Cleaning Your GORE-TEX Jacket

1. Preparation is Key

• Empty all pockets and close all zippers (front, pit zips, pockets).
• Fasten any flaps and cuffs.
• Loosen drawcords.

2. Choose the Right Detergent

Avoid conventional laundry detergents, fabric softeners, bleach, and stain removers, as these can leave residues that clog the membrane and damage the DWR. Instead, use a technical cleaner specifically designed for waterproof breathable fabrics, such as Nikwax Tech Wash or Grangers Performance Wash.

3. Washing Process

1. Machine Wash: Place your GORE-TEX jacket (and other GORE-TEX items, if washing together) into the washing machine.
2. Detergent Dispense: Add the recommended amount of technical cleaner to the detergent dispenser.
3. Cycle Selection: Wash on a gentle cycle (delicate or permanent press) with warm water (around 105°F / 40°C).
4. Rinse Thoroughly: Run an extra rinse cycle to ensure all detergent residues are completely removed.

Drying Your GORE-TEX Jacket and Reactivating DWR

1. Air Drying

Hang your jacket on a hanger to air dry, preferably in a well-ventilated area, away from direct sunlight.

2. Tumble Drying to Reactivate DWR

Once mostly air-dried, GORE-TEX recommends tumble drying for 20 minutes on a warm, gentle cycle. The heat from the dryer helps reactivate the DWR finish on the outer fabric. If your jacket is older and the DWR is significantly worn, this step alone may not be enough to restore full water repellency, but it’s crucial for maximizing the existing DWR’s performance.

Re-Waterproofing (DWR Application)

If water no longer beads up on your jacket’s surface after washing and tumble drying, it’s time to reapply a Durable Water Repellent (DWR) treatment. You can test this by sprinkling water on the clean jacket; if it soaks in rather than beading up, DWR is needed.

1. Choose Your DWR Product

There are two main types:

• Wash-in treatments: Applied in the washing machine after cleaning. Ideal for ensuring uniform coverage.
• Spray-on treatments: Applied to the wet or dry outer fabric. Good for targeted application or if you only need to treat one item.

Both Nikwax and Grangers offer effective wash-in and spray-on options designed for GORE-TEX.

2. Application Steps

For Wash-in Treatments:

1. Follow the product instructions carefully. Typically, you’ll place the clean, wet jacket back into the washing machine.
2. Add the recommended amount of wash-in DWR to the dispenser.
3. Run a gentle, warm wash cycle.
4. Tumble dry on a warm setting as per the instructions to cure the DWR.

For Spray-on Treatments:

1. Lay the clean, wet jacket flat on a clean surface or hang it on a hanger.
2. Spray the DWR product evenly onto the entire outer surface of the jacket from about 6-10 inches away, ensuring full saturation. Pay extra attention to high-wear areas like shoulders and cuffs.
3. Wipe off any excess treatment immediately with a damp cloth to prevent streaking or residue buildup.
4. Tumble dry on a warm setting to cure the DWR, as heat activates the new water repellency.

Tips for Longevity and Continued Performance

• Wash Regularly: Don’t wait until your jacket is visibly filthy. Regular cleaning prevents build-up that degrades DWR.
• Spot Clean: For small stains, gently wipe with a damp cloth and a small amount of technical cleaner.
• Storage: Store your GORE-TEX jacket clean and dry in a cool, well-ventilated area, away from direct sunlight.
• Avoid Chemicals: Never use dry cleaning, bleach, or harsh stain removers, as these can permanently damage the membrane and DWR.

Conclusion

Properly cleaning and re-waterproofing your GORE-TEX jacket is an essential part of maintaining your outdoor gear. By following these steps, you’ll ensure your jacket continues to provide optimal waterproof, windproof, and breathable performance, keeping you comfortable and protected no matter the weather. Invest a little time in care, and your GORE-TEX gear will serve you well for many adventures to come.