quick question to see where it is you buy you ripstock silnylon for a diy tarp project. I'm not paying 150 dollars for a tarp. Period! I have a lady friend who is willing to help me sew up my own. Please let me know what sort of material to steer clear of too. Don't want it leaking. I would imagine there would be a seam sealer needed too. Thanks for your help here. I really enjoy learning from the best!