How long does permethrin spray (say from WM Sawyer spray) take to dry when applied?
How long does permethrin spray (say from WM Sawyer spray) take to dry when applied?
Time is but the stream I go afishing in. Henry David Thoreau
I think the bottle says something like 2 hrs. I let it dry overnight cuz I could, but dry is dry.
Good luck,
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How long does one treatment last?
I always give it 24 hours, but I've got a cat.
Trust nobody!
The Sawyer brand claims 2-4 hours depending on humidity.
Originally Posted by Chas
For items that don't get washed (e.g., backpack), 42 days.
Laundering treated clothing shortens that length of time.
The insert in the box of Sawyer permethrin contains more info.
Temperature, humidity, air movement and application rate will dictate the drying time. You're waiting for water to evaporate rather than a quick evaporating solvent.
I also give it overnight in the garage.
If I spray my gaiters, pack or hammock it usually dries in under an hour. When I soak it takes several hours.
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I let mine dry overnight outside. Cat also
cotton socks and clothing: Couple of hours in the southern sun, dry as a bone. Nylon or polyester clothing or gear like hammocks or packs, way quicker. But for maximum caution because I also have cats, I let it sit out in the shade a few more hours. Or once I put it in the dryer on low heat for 20 minutes or so after it was mostly dry from being outside. That was so I could go ahead and wear it that day. It was uber dry after that. But usually I give the clothes a couple of hours in the sun then a few more hours in the shade, but many other things like packs are bone dry way before that amount of time. ( of course, I am talking MS Sun in the summer! But then dry AZ would put that to shame )
If sprayed 30 seconds on each side of each garment, with Sawyers, seems to last about 6 weeks, washing no more than once a week. However, I usually don't wash everything once a week because I don't hike or get it dirty/sweaty that often. I have more than one set of garments to wear, and when not wearing I store in a closed up garbage bag. Less air contact is supposed to = slower breakdown.
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