Sanding sealer on red-brown cedar

Hello, I have a board of beautifully grained red cedar with the deep brown reddish colouring, but coarse open grain. The board is mostly brown -red, with the grain pattern shown as much darker brown lines

I am thinking of putting a sanding sealer on it, something like the Feast Watson product, then sanding back and oiling the board with tung oil. I have never used sanding sealer before.

Normally sanding sealer is whitish in colour. Do I need to tint this? I don't want any white stuff in the bottom of the pores of the timber - would ruin the deep red-brown finish

I am open to any ideas and suggestions