make your own latex mix, use insulating and packing tape,old valves, use conti tyres. mucho cheapness works 100% of the time IME, lighter than using bmx tube and works just as well super ghetto I have never had to use soap suds and have never got messy. I used Stans and Rolf Dolomite rims and these rims and 3 different types of conti tyres has worked fine so far. THE MOST IMPORTANT factor is tyre rim combiation so if your tyre is a slack fit on the rim I woulndnt even bother trying just try another brand. I also started off with a compressor, but yesterday replenished some sealant and reseated with just a track pump. remember tight fit for tyres is good