Hi Community, I am new here and have a question regarding my engineered timber floor Herringbone project.
It is all going well so far, but after finishing half of the room I found 2 Herringbone boards being hollow and they crack when you walk over it.
All the others are rock solid glued to the concrete.
I found the product „Dritac wood floor repair kit“ - https://www.dritac.com/product/dritac-engineered-wood-floor-repair-kit/ , which seems to be exactly what I need. Unfortunately, this product is only available from overseas as far as my research goes.
I don’t think that this problem does not exist in Australia, but I was unable to find an equivalent product or workaround.
Anyone here who can recommend a similar product available in Australia? That would be much appreciated, as I wanted to fix it rather sooner than later.

Thank you in advance and Merry Christmas!