Tech

How to re-waterproof an old raincoat

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Feel the inside of the fabric behind the dark patches. Does it feel wet? If it is (and you are sure it is not just sweat), it may be that water is infiltrating and your jacket or pants need a new DWR application.

A note about getting wet from heavy rain: Even a new hard shell jacket will get wet after a long period of heavy rain.Therefore, if you see dark and wet patches after a long time in a storm, you won’t must Means you need a new DWR coating. Do some detective work to be sure. Once you bring the clothes home, it has a chance to dry out, spray it with a spray bottle filled with water and see if there is any accumulation of moisture. If it gets wet again, it is time for more DWR.

Wash the clothes first

Wash clothes before re-waterproofing to remove body oils and old dirt. This will help the new DWR coating adhere better to the fabric. Buy cleaning products specially made for outdoor technology clothing, such as Nikwax Tech Wash, but you can also use a small amount of ordinary washing powder.

You need to wash these clothes separately from regular non-outdoor clothes. After that, you can apply DWR processing. You have two options: spray or wash in.

How to apply spray DWR

Photo: Gear Assistance

For spraying options, there are Gear Aid ReviveX Spray, Grangers Performance Repel Plus Spray and Nikwax TX.Direct Spray.

No matter which way you choose, you can take it outside and use it-it’s not good to inhale these things. Just hang your clothes on an outdoor hanger, zip up and close your pockets, and spray the outside of your jacket or pants.

One spray can is enough to re-waterproof a piece of clothing-which means a jacket and a pair of pants. According to my experience, it is almost not enough, so don’t waste it spraying on any specific location on the clothes for too long. If there is still remaining after finishing, apply it to areas with severe wear, such as the shoulders, armpits, and crotch/upper thigh area.

How to apply wash-in DWR

Generally, you will want to use DWR wash-in treatment in a top or front-mounted washing machine set to warm water temperature and circulation, but please consult the bottle of the product you are using. Your best choices are Gear Aid ReviveX Wash-In, Grangers Repel Wash-In and Nikwax TX.Direct Wash-In.

If you don’t have a washing machine, you can apply the product by hand with a sink or a bucket of warm water and some gloves. Some DWR treatments instruct you to follow up, throw the clothes into a dryer set to a low heat cycle to seal the coating. Just check the instructions on the bottle you are using first.

How long will it last

The reapplication of DWR will not last as long as the processing of factory applications. There is no way to solve it: you just need to get used to checking your rain gear before traveling and reapplying DWR as needed. High-impact areas such as the shoulders and armpits are more prone to wear, and these areas tend to lose their waterproof coating faster than other areas.

For a long time, DWR treatment has used long-chain perfluorocarbon (PFC), which produces toxic by-products in the manufacturing process and diffuses into the environment as the product wears. Our recommended DWR treatments-ReviveX, Grangers and Nikwax-use fluorocarbon-free formulations. Although you may be reluctant to introduce more synthetic chemicals into your gear, these treatments can extend the life of your clothes several times, reducing waste over time.

The more clothing you use, the faster the DWR coating will wear out. But there is no limit to the number of times you can reapply for DWR. As long as the clothes are intact, you can re-waterproof them over and over again in the next few years, thus avoiding replacing hundreds of dollars of raincoats.


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