Lowest outer core will not transmit s waves because it is made of what?

Because of a liquid, but idk what the liquid is called...

P-waves pass through both mantle and core, but are slowed and refracted at the mantle / core boundary at a depth of 2900 km. S-waves passing from the mantle to the core are absorbed because shear waves cannot be transmitted through liquids. This is evidence that the outer core does not behave like a solid substance. I really hope this helps