There is plenty of force on the tubes in that area, can be seen from ther water spray. I would not recomend continuing usage of the boat if anything even slighly loose there, water spry wil easily increase damages.
I had also som wear and tear on the same parts, staring to peel of. I used Rema tiptop
sc2000 and it works briliantly, can highly recomend it. When on fabric you need to work pretty fast but otherwise very good stuff IMHO, easy preaparation. Price is not bad either as its not a marine product, and exiper dates on the can was years ahead.
REMA TIP TOP - Distribution - Germany - Head Office