| 304 Stainless Steel Common austenitic stainless steel for interior commercial bathrooms | Very Good Performs well in normal humid indoor environments | High strength, good impact resistance, and strong resistance to cracking or flaking | Brushed satin, mirror polish, bead-blasted, or PVD-coated finishes | Clean regularly with mild soap and water; dry after cleaning to reduce water spotting | Approximately 10–20 years when correctly specified and maintained | Grab bars, towel bars, robe hooks, shelves, toilet accessories, and public-area fittings | Can show tea staining or surface corrosion in coastal, chlorinated, or chemically aggressive locations | Excellent general-purpose choice |
| 316 Stainless Steel Molybdenum-alloyed stainless steel for higher-exposure environments | Excellent Better resistance to chlorides and salt exposure than 304 stainless steel | High strength and excellent resistance to repeated commercial use | Brushed satin, mirror polish, bead-blasted, or PVD-coated finishes | Use non-abrasive cleaners; remove salt, chlorine residue, and hard-water deposits promptly | Approximately 15–25 years or longer in well-maintained installations | Coastal hotels, resort bathrooms, spa areas, pool-adjacent facilities, and high-end guest rooms | Higher material cost than 304 stainless steel; surface still requires proper cleaning | Best choice for demanding or coastal conditions |
| Solid Brass Copper-zinc alloy commonly used for decorative and structural fittings | Good to Very Good Corrosion resistance depends strongly on alloy, coating, and water chemistry | Dense, stable, and suitable for load-bearing fittings when adequately engineered | Polished chrome, brushed nickel, antique brass, brushed brass, lacquered brass, or PVD | Use pH-neutral cleaners; avoid abrasive products and prolonged exposure to acidic chemicals | Approximately 10–20 years; longer with a durable protective finish | Faucets, valves, decorative accessories, premium traditional or luxury-style bathrooms | Some finishes may tarnish, discolor, or develop patina; dezincification can occur in unsuitable water conditions | Excellent for premium appearance and solid construction |
| Zinc Alloy Die-cast alloy frequently used for cost-controlled decorative accessories | Moderate Requires a well-controlled plating system to perform reliably | Suitable for light-to-medium duty; generally less impact-resistant than solid brass or stainless steel | Electroplated chrome, nickel, satin finishes, or painted decorative coatings | Wipe dry after cleaning; avoid chipped plating, harsh chemicals, and standing water | Approximately 5–10 years depending on exposure and coating quality | Light-duty towel hooks, soap dishes, tissue holders, and decorative guest-room accessories | Coating damage can expose the substrate to corrosion; not ideal for high-impact or constantly wet areas | Use selectively for light-duty applications |
| Aluminum Lightweight metal suitable for selected accessories and architectural details | Good Naturally forms a protective oxide layer; performance depends on alloy and finish | Lightweight and adequately durable, but softer and less stiff than stainless steel | Anodized, powder-coated, brushed, or clear-coated finishes | Use mild cleaners; avoid strong alkaline or acidic chemicals that may attack the finish | Approximately 8–15 years in suitable indoor applications | Lightweight shelves, framed accessories, partitions, trim, and selected wall-mounted fittings | Can dent, scratch, or galvanically corrode when directly coupled with incompatible metals in wet conditions | Good where low weight is important |
| Engineering Polymer Examples include glass-filled nylon, ABS, and other commercial-grade polymers | Good Does not rust; chemical and UV resistance vary by polymer formulation | Good impact resistance in suitable grades; not intended for every structural or load-bearing use | Molded color, textured surface, soft-touch coating, or antimicrobial additive where specified | Clean with compatible neutral detergent; avoid solvents and excessive heat | Approximately 5–12 years depending on polymer grade, UV exposure, and mechanical load | Shower accessories, dispensers, accessibility components, high-humidity areas, and budget-focused projects | May discolor, scratch, or become brittle under unsuitable UV, heat, solvent, or load conditions | Useful for corrosion-free and cost-sensitive applications |