[droller]

This won’t help with having elegant looking seams, but you can use the TPU from the fabric to make patches.  Place a strip of TPU coated fabric with the TPU side down on some parchment paper.  Put on some leather gloves.  Heat the nylon side twice as long as you would for normal sealing.  While holding the fabric strip, raise your iron onto its edge at a 45 degree angle and push away with the iron while pulling the strip toward you.  The TPU should bunch up at the edge of the fabric, or stick to your iron, remove it while wearing your gloves and set it aside on a clean piece of parchment paper.  Continue this process until you have enough for a patch.  Place all the TPU chunks or bits together on the parchment paper.  You will need some silicone tape, I have been using “Sharkbite” brand, it is 2 inches wide, and it is translucent.  Silicone tape is mostly used for quick fix plumbing problems.  It only sticks to itself, and it can withstand heat up to 500 degrees F.  Lay your silicone tape over the TPU bits, then use your iron to melt it all together, this will take about twice as long as your normal sealing time.  Once you remove the iron hold down the silicone tape and use your silicone roller to flatten the TPU patch.  To apply the patch simply put it where it is needed, cover it with the silicone tape and press with the iron, again it will take longer to heat through the silicone tape and melt the TPU.  Use your silicone roller to ensure it has melted together.  It will look shiny, but I have had no problems with the pinhole leaks that I have repaired with this method. I have even used it on some of the corners where the seams meet the floor with good results.  The TPU will melt to the nylon side of the seam as well which I think is a slightly better repair than Aquaseal or Seam Grip.

Sorry that was so long winded, and not much help to the original poster.  But since the subject was TPU I thought it might help someone.

[Author]

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