PentalTek in Calacatta Elegante PentalTek combines the strength and durability of a porcelain slab, with sophisticated design and a refined palette. By utilizing innovative technology, we’re able to expand the design potential for both interior and exterior spaces. Along with the technical performance of a porcelain surface, PentalTek’s XL size allows for seamless installations from large kitchen islands, to long stretches of countertops, expanses of walls, and even flooring.