Hypalon will have threads coming out of the seams. We've got an Apex brand hypalon dinghy that has what I consider an inferior hypalon to the original Dupont stuff used on dinghys like the old Avon's. I've also noticed the same type of problem on it when the light grey surface coating has come away in small patches on the handles and along the strips that covers the seam of the tubes connecting to the hull
, exposing the lighter fabric
reinforced material underneath similar to your picture less the water
. I haven't worried too much about it (the dinghy is about 10 years old now) as with hypalon the top layer does not contribute to the strength and I haven't noticed any UV degradation of the underlying fabric
Having said that, I have sometimes wondered if the material is either a faux hypalon or lighter grade then the tubes because the tubes themselves have never had a problem.
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