What Type Of Wood Is The Strongest What Type Of Wood And Material Should I Use For A Polyurethane Mold?

What type of wood and material should I use for a polyurethane mold? - what type of wood is the strongest

I'm trying to fine (about 1 / 4 to do "), parts for a project that I do, and I wonder what kind of wood to produce a good shape. Was also the kind of flexible urethane-looking average (it can bend to bend a bit) to the surface. I am also looking for a material that is also in conjunction with 3M tape can. The recommendations of where to buy materials? "any model suggestions are appreciated!