How to re-waterproof a worn rain jacket effectively?

Reviving Your Worn Rain Jacket’s Defenses

There’s nothing worse than heading out into the elements with a rain jacket that no longer repels water. That satisfying beading effect eventually fades, and soon you’re feeling damp and uncomfortable. This doesn’t mean your trusty jacket is ready for retirement; often, it just needs its Durable Water Repellent (DWR) coating renewed. Restoring your jacket’s waterproofing is a straightforward process that can significantly extend its life and keep you dry on your adventures.

Understanding Your Jacket’s Waterproofing System

Most modern rain jackets achieve their waterproof capabilities through a two-part system: an outer DWR coating and an inner waterproof/breathable membrane (like Gore-Tex, eVent, or proprietary brands). The DWR causes water to bead up and roll off the fabric’s surface, preventing the outer fabric from saturating. This allows the inner membrane to do its job, letting perspiration escape while blocking rain. When the DWR wears off, water soaks into the outer fabric, creating a clammy feeling and reducing the membrane’s breathability, making you feel wet even if the membrane hasn’t failed.

The Essential First Step: Thorough Cleaning

Before you even think about applying a new DWR treatment, your jacket needs a meticulous wash. Dirt, body oils, bug spray, and other contaminants can clog the fabric pores and prevent DWR from bonding effectively. Regular detergents can also strip DWR and leave residues that hinder breathability and waterproofing.

• Use a Specialized Cleaner: Always use a technical wash designed for waterproof breathable fabrics (e.g., Nikwax Tech Wash, Grangers Performance Wash). These cleaners are formulated to remove grime without damaging DWR or leaving residues.
• Preparation: Zip up all zippers, empty pockets, and secure any flaps or Velcro straps.
• Washing Machine: Wash the jacket in a front-loading washing machine on a gentle, cool-to-warm cycle. Avoid top-loading machines with agitators, as they can damage the fabric. Do not use fabric softener, bleach, or standard laundry detergent.
• Rinse Cycle: Run an extra rinse cycle to ensure all detergent residue is completely removed.

Choosing the Right Re-Waterproofing Product

There are two main types of DWR treatments:

1. Wash-In Treatments: Applied in the washing machine, these products impregnate the entire fabric with DWR. They are easy to use and ensure even coverage but can sometimes reduce the fabric’s breathability, especially if the jacket also has a wicking lining. Best for older jackets or when you want comprehensive treatment.
2. Spray-On Treatments: Applied to the exterior of the jacket, these allow for targeted application only where needed. They maintain the jacket’s original breathability better, especially for garments with wicking inner linings. Ideal for specific worn areas or newer jackets.

Read the manufacturer’s recommendations for your jacket and the DWR product to ensure compatibility.

Applying the Re-Waterproofing Treatment

For Wash-In Treatments:

• After washing, leave the jacket in the machine.
• Follow the product’s instructions for dosage, adding the treatment to the detergent dispenser.
• Run another gentle, cool-to-warm cycle. Do not use an extra rinse cycle this time.

For Spray-On Treatments:

• Lay the clean, damp jacket flat on a clean surface or hang it on a hanger.
• Spray the treatment evenly over the entire exterior surface from about 6-8 inches away. Pay extra attention to high-wear areas like shoulders, cuffs, and the front.
• Ensure complete coverage but avoid over-saturating.
• Wipe away any drips or excess with a clean, damp cloth immediately to prevent streaking.

Drying and Curing for Maximum Effectiveness

Once the treatment is applied, drying is a crucial step to bond the DWR properly.

• Air Drying: Many DWR products are air-cure, meaning they will dry effectively at room temperature. Hang the jacket on a hanger in a well-ventilated area, away from direct sunlight.
• Heat Activation (for some DWRs): Some DWRs require heat to activate and bond properly to the fabric. If your jacket is tumble dryer-safe and the DWR product instructions recommend it, tumble dry on a low heat setting for 20-30 minutes. Be cautious not to use high heat, which can damage the waterproof membrane.
• Check Instructions: Always refer to the specific DWR product’s instructions for the optimal drying and curing process.

Conclusion

Re-waterproofing your rain jacket is a simple yet vital step in maintaining your outdoor gear. By following these steps – thorough cleaning, selecting the right product, careful application, and proper drying – you can restore your jacket’s performance and ensure many more years of dry, comfortable adventures. Regular maintenance will keep your gear performing at its best, protecting you from whatever weather comes your way.