bonshure mix & fill can be mix with most of the fine wood sawdust besides
merbau wood. It is very perfectly match with the wooden appearance by filling up the gap. Especially after sealer application done. It have some elasticity so it would not shrink or crack with small movement of the wood.
Leaving overnight for the drying time is the best where it can be fully cure and to prevent the dirt may stuck at the gap. It also can be sand after 2 - 3 hours just it would not be that ideal.