I was looking for a way to make a lightweight (comparable to silnylon) and inexpensive tarp when I came across this: http://www.youtube.com/watch?v=NqaSYONkTFQ

Well, it certainly is cheap. I read somewhere that using 2 mil plastic sheeting weighs about 1.4 oz's/2yd.

That's about what Silnylon weights.

Does anyone have any experience using a plastic dropcloth as a tarp? Do you know how durable it is?

I'm thinking it would be great to experiment with different DIY tarp designs and sizes till I get it just the way I want, all before spending the time and money to DIY a tarp out of 30D silnylon.

What are your thoughts on this?