関連ワード:  does polystyrene absorb moisture    does styrofoam absorb moisture    does polystyrene absorb water    does styrofoam absorb water    does styrofoam absorb humidity    does expanded polystyrene absorb water    does polystyrene foam absorb water    does extruded polystyrene absorb water    does polystyrene insulation absorb water    do polystyrene balls absorb water