Modifiers matching rubber:

• soft,
• porous,
• natural,
• expensive,
• conventional,
• inexpensive,
• reliable,
• raw,
• ordinary,
• softer,
• polar,
• liquid,
• special,
• elastic,
• thermoset,
• organic,
• hard,
• stock,
• conductive,
• resilient,

Simple categories matching thermoset:

• polyester,
• rubber,
• polymer,
• system,
• resin,
• plastic,
• material,
• elastomer,
• adhesive,