[darrens]

Found all the sources of my leaks!  Found a number of microscopic leaks in the TPU where iron had touched it and/or near seams.   Technique i found to find them was painting on undiluted car wash.  Undiluted meant it was nice and thick and microscopic bubbles showed up that I just did not see with the diluted car wash methods.   Painting on with wide paintbrush doesn’t take too long at all.

[darrens]

One more question please Matt.  Do you know if the TPU fabric is still airtight if the TPU coating is melted?  On both my rafts i have areas where the TPU has been melted where i touched it with my iron.  Am wondering if air may escape very very slow through these?   Ie.  Does the airtightness come from the TPU or the nylon fabric?

[darrens]

Hi Matt,

OK, thanks for the tips.  As long as i know there must be a leak somewhere i will persevere to find it.  It bugs me knowing there’s air loss coming from somewhere….

I’ll try the more concentrated soap mix as you suggested.  And bribe the kids to stare at it with me ;).

[Author]

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