This may seem like an odd title for a fishing forum but does anyone know whether solvent welds for PVC piping is just solvent, or does it contain PVC or CPVC? The reason I ask this is that I've been thinking about thin lines for ESN. The ones you can buy seem to me to be ridiculously expensive for what they are, considering that they seem to be just made of a core of thin braid with a level PVC coating. However, I've read that simple braided line makes a good alternative but the braid quickly wears away the fly rod rings. So why not take the 0.45mm or so braid and infuse it with a PVC or CPVC solution to give the braid a less abrasive surface? The best solvent for PVC seems to be THF, which I don't have, but could I use a diluted solvent weld? I should be able to thin it with a little acetone that I already have so that it penetrates the braided line better. According to the internet searches, PCV piping solvent weld should contain CPVC, the chlorinated PVC, which is more flexible, but does it? Or would something like Tru Blue pipe sealant, that contains slippery PTFE, be even better? I don't intend to fully coat the braid like a fly line, just infuse it.