Topic
Water proof treating a pack?
Forum Posting
A Membership is required to post in the forums. Login or become a member to post in the member forums!
Home › Forums › Gear Forums › Gear (General) › Water proof treating a pack?
- This topic is empty.
-
AuthorPosts
-
Apr 25, 2006 at 5:11 am #1218416
Ok out there- I just got a new pack – a really nice and light external frame thing from Jansport. Anyhow, I was wondering, how many out there use some kind of water proof treatment on new packs? I mean, it seems better than using a cover during heavy rains, and even though it is not a perfect solution, it is a light one, and one that may at least keep things just that bit drier during snow/rain. So- any comments? I have this Granger brand ‘heat activated’ water proofing that looks like it would do the trick nicely. I look forward to your feedback. Thanks in advance!
Apr 25, 2006 at 9:04 am #1355435The Jansport probably has polyurethane coating on the inside already. Heat wouldn’t be real good for it. I NEVER put PU coated items in a dryer or even expose them to hot water– hand wash in lukewarm water and hang to dry out of the sun.
I imagine you could use some sort of DWR spray on it. Take it outside and spray it with the hose– if the water beads up and runs off (and I bet it will), there isn’t much more you’re going to do with it.
What I would do would be to work on waterproofing what I put in the pack– silnylon dry bags for your clothes and sleeping bag. Less expensive options would be to use turkey roasting bags or trash compactor bags.
A pack cover won’t hurt, but it still isn’t waterproof enough to bet your life on– finding yourself in a bad situation with wet clothes and a wet sleeping bag. You can get two good size Sea-to-Summit bags for the same weight as the pack cover and they can be used in other packs and for day hikes.
I think pack covers are outrageously priced too. With an external frame pack is is pretty easy to use a garbage bag or sheet plastic to cover it. A length of small diameter shock cord and a toggle will help– like a huge and adjustable rubber band.
Apr 25, 2006 at 11:58 am #1355440Right. Generally, pack fabrics are already waterproof. Seams and zippers, and any unprotected openings are where water gets in.
You can seal the seams to slow water’s progress inside, but I’ve only found this effective on simple pack designs with relatively few seams–rare these days. Unless zippers are of the water-resistant kind, or have aggressive storm flaps, there’s little you can do to prevent them from wicking water inside.
Pack liners work well protecting the main compartment–trash compactor bags are cheap and effective–but leave items in pockets unprotected. They also don’t prevent water from pooling in the main compartment, which is messy and eventually heavy (some packs have drain holes to let water back out).
Pack covers work well, but shoulder straps and waist belts still get soaked, as does any back padding. Generally, only a poncho will protect the entire pack.
Apr 25, 2006 at 1:09 pm #1355441Waterproofing a backpack is not reliable. As stated by others, seams and zippers will leak. I’m sure this article is old hat to most here but I go this route:
http://jwbasecamp.com/Articles/DryGear/index.html
I’m not quite as fastidious as Jim is but I do double bag my sleeping bag and extra clothes. I use a pack liner for all the contents, with my camp clothes and sleeping bag at the bottom in a second plastic bag (duct-tape reinforced oven turkey bags work great for this). Anything in a pocket that needs protection get zip-locked. I’ve never had anything get wet through many hours of heavy rain. If you’re worried about total immersion you might want to look at individual drysacks like those from Sea to Summit.
Apr 25, 2006 at 5:45 pm #1355455Thanks, guys. All of your insight is helpful. AFter reading and considering, I think I’ll just use a garbage bag as a pack liner, then the usual stuff sacks of plastic and wetbags. I always have a poncho, so I sort of forgot about that. Thanks again.
-
AuthorPosts
- You must be logged in to reply to this topic.
Forum Posting
A Membership is required to post in the forums. Login or become a member to post in the member forums!
Our Community Posts are Moderated
Backpacking Light community posts are moderated and here to foster helpful and positive discussions about lightweight backpacking. Please be mindful of our values and boundaries and review our Community Guidelines prior to posting.
Get the Newsletter
Gear Research & Discovery Tools
- Browse our curated Gear Shop
- See the latest Gear Deals and Sales
- Our Recommendations
- Search for Gear on Sale with the Gear Finder
- Used Gear Swap
- Member Gear Reviews and BPL Gear Review Articles
- Browse by Gear Type or Brand.