Tyvek is a brand of flashspun high-density polyethylene fibers, a synthetic material; the name is a registered trademark of [DuPont](http://www.dupont.co.uk/). The material is very strong; it is difficult to tear but can easily be cut with scissors or a knife. Water vapor can pass through Tyvek, but ...

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Is Tyvek 44grs/m2 (Tyvek® Soft Structure Style 1443R) waterproof enough to be used as a groundsheet/footprint or tent bottom, any experience?

Has anyone practical experience with the light, soft version of Tyvek used as footprint / groundsheet or tent bottom? I like the material, used it once so far as a ground sheet (footpint) on grass ...
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How resistant to water is Tyvek in practice

Tyvek is labeled as "water resistant" and not "water proof", but I'd really love to know how much is the fabric resistant to water in practice. Some people built tarps or even tents out of it, but I ...
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Where can I get Tyvek maps?

I'd like to get some Tyvek maps, both topo maps and regular street maps of a few U.S. cities. Where can I get these?
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How to seam seal Tyvek?

Tyvek generally comes in 4' and 5' wide sheets. To make a suitable tarp, footprint, groundcloth, etc. I will need to sew together a couple of sheets. How do I seam seal the Tyvek to prevent leaking ...
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What kind of Tyvek is suitable for footprint material

When buying Tyvek online, there appear to be a myriad of options and numbers. Which numbers are suitable for making a tent footprint? Known numbers: 1443R, 1622E, 10G, 10GX, 1460, RV, 14M... (may ...