I know over and over this question is asked but how can I sink this driftwood? Ive cured it for a week boiled it twice and no results. I have had no truouble with previous driftwood, except for now.
leave it in the water until it becomes water logged and it will eventualy sink (may take weeks or months). Place a piece of slate or large rock on it to keep it weighted down.
I had a piece take over 8 months before, patience. I just weighed it down with river rocks and anchored it to a piece of slate until it was waterlogged. Some people soak them in bins until they are fully sinking.