I was having a lot of trouble with a 2" pipe leaking. I put on the thread seal tape and did the job twice, but it kept leaking. The smaller (1/2, 3/8) fittings were just fine. So I started looking and saw that some people said thread seal tape is only reliable for 1" and under pipes. Obviously, 2" is way over that. Since I had no other option at hand, I used Silicone I caulk and waited a day. Seems to have killed the leak completely, but this is also kind of pricey and was really just a way out of the situation. So my only option seems to be the Oatey goop which is pricey and has a short shelf life or hemp and paste, but I have not seen hemp and paste in the US. Is this hemp illegal in the USA? I have seen plumbing hemp sold on eBay, but it's from out of the country and quite expensive. So where can I get hemp in the US? Would this hemp cord: http://www.ebay.com/itm/Hemp-Cord-20lb-400-Natural-/112181700848 do the job? Will it work with http://www.ebay.com/itm/PHOENIX-27-XL-PIPE-JOINT-LUBRICANT-WATER-DISPERSIBLE-NNB-/282219006954 ? I'm looking for something reliable and with indefinite shelf life.