Marble, Travertine, Limestone, Onyx, and other calcium-based stones have long been the material of choice for refined residential and commercial interiors—luxurious, timeless, and full of character. However, their vulnerability to etching, staining, scratching, and heat damage from everyday elements such as citrus, wine, hard water, and cleaning products can make them a risky choice. NBR received frequent calls for assistance with high-traffic areas such as bars, tables, kitchens, and bathroom countertops

We, at NBR, believe beauty shouldn’t come at the expense of compromise. That’s why we’ve introduced RAKU, the next-generation protective coating that empowers property owners, designers, and their clients to choose these beautiful stones without fear. Invisible to the eye, yet powerful in performance, RAKU preserves the integrity of natural stone—so your vision stays as stunning as the day it was installed.

For years, we’ve searched for a surface protection solution that honors our high standards. Most other anti-etch coatings have substantial flaws, such as astronomical costs, peeling/tearing, and heat resistance issues. RAKU not only guards against etching and staining but also resists scratching and heat without compromising the stone's elegance.

Subtle, durable, and invisible on polished surfaces (semi-matt on honed), RAKU has become a game-changer: a next-generation nano coating engineered in Italy to resist etching, staining, scratching, and thermal shock. RAKU forms an ultra-thin, invisible layer that provides real-world protection from food, drinks, and daily wear—indoors or outdoors, horizontal or vertical—wherever natural stone surfaces are used.