Cleaning. In everyday use, warm water, a soft cloth or a clean mop and a neutral to slightly alkaline pH cleaner are sufficient. Soapy engineered stone cleaners, mild all-purpose cleaners, mild washing-up foam and special engineered quartz care products are suitable. Caesarstone recommends its own care products (Caesarstone Cleaner) – these are not essential, but well matched. Take up spilt liquids – wine, coffee, juices, oil – promptly in everyday use.
Do not use. Concentrated acids (sulphuric, hydrochloric, nitric acid), concrete and rust removers, paint strippers, oven cleaners, acetone, petrol, thinners, nitro cleaners and very strongly alkaline industrial cleaners are off limits – they can attack the polyester resin. Also avoid chlorine-based bleaches in high concentration. Do without abrasive pads (steel wool, green scouring pads); scratching is undesirable on the polished surface.
Impregnation. A classic natural stone impregnation is not necessary – engineered quartz is inherently dense and non-porous, and water absorption is below 0.05 %. A sealant would tend to show on the surface as a veil.
Kitchen. 2020 Cinder is a classic kitchen material. Despite its high material hardness and acid resistance, the following applies: use chopping boards (knife marks can leave the polyester resin matt over time) and use trivets for hot pots and pans – direct heat over points can cause local discolouration. Direct contact with a hot baking tray (above about 150 °C) risks stress cracks. On site, the dishwasher must not run in full contact directly beneath the slab – heat protection is standard practice. On the warm greige slab, dark stains (red wine, coffee, berry juice) are visually far less conspicuous than on a solid white slab; even so, the material is no invitation to leave them standing.
Bathroom. In the bathroom, Cinder is very well suited as a washstand, wall cladding, bath surround and shower. Do not use anti-limescale sprays and limescale-dissolving bathroom cleaners in high concentration, and wipe standing water away promptly in the shower area so that a limescale film cannot build up.
Floors and stairs. The surface finishes available in stock are listed in the »Finishes« block further down. Dirt-trapping mats at the entrance reduce the ingress of scratching particles.
Outdoors and frost. Not suitable for external construction. Polyester binder yellows under UV radiation, and freeze-thaw cycles can lead to micro defects. Nor is it recommended for permanent use in fully sunlit conservatories or open loggias – Caesarstone explicitly excludes external use and fully sunlit interior surfaces from the warranty.
Warranty and repair. In the residential sector Caesarstone grants a lifetime warranty against material and manufacturing defects (“Caesarstone Forever”), subject to fabrication and care to standard by certified specialist firms. The surface finishes available in stock are listed in the »Finishes« block further down.