412 The Quarzex kitchen sinks consist of 80% quartz sand and 20% acrylic resins,® Quarzex® extremely hard and thick, which provide them with an extraordinary resistance.With a warm and natural texture, they are available in different coloured finishes that remain intact against chemical agents and UV light, allowing them to remain in perfect condition over time. Moreover, the zero porosity of this compound results in waterproof surfaces that avoid the leakage of liquids and therefore the proliferation of humidity and bacteria. Oslo kitchen sink and Targa faucets.