AquaFix SPC Grand Cru — PetrusPetrus is one of the deeper tones in the Grand Cru collection a rich, dark oak color with prominent grain movement and subtle variation across planks. It reads as high end hardwood, without any of hardwood's vulnerability to moisture, denting, or subfloor imperfection. Grand Cru SPC is built on a stone polymer composite core genuinely rigid, genuinely waterproof, and genuinely dimensionally stable. It won't expand and contract with seasonal humidity