If you have a metal allergy, particularly to nickel or cobalt, you might worry about touching public benches, chairs, or tables in parks, plazas, or transit stops. The good news is that modern urban outdoor furniture is rarely made of bare metal surfaces that contact your skin. Instead, manufacturers use a range of materials that are either naturally metal-free or coated to prevent allergic reactions. Below is a breakdown of what you are likely to encounter.
First, powder-coated aluminum is common, but note that the coating completely seals the metal. This means you will not touch raw aluminum. However, if the coating chips or wears off, there is a small risk. For total peace of mind, look for furniture with thick, durable coatings, or choose pieces with wooden or plastic armrests and seat panels.
Second, high-density polyethylene (HDPE) is a top choice. This recycled plastic is used for slatted benches, tables, and even entire seating units. HDPE contains no metal at all, is weather-resistant, and feels smooth to the touch. Many urban furniture lines now use HDPE for seats and backs, with only internal steel frames for structure—those are hidden under the plastic.
Third, teak or other hardwoods appear in upscale urban settings. Teak is naturally oil-rich, resistant to rot, and contains no metal. Some designs use stainless steel fasteners, but these are recessed and covered with wood plugs. If you are extremely sensitive, avoid furniture with visible metal bolts, even if they are stainless steel, because some stainless alloys contain trace nickel.
Fourth, fiberglass-reinforced plastic (FRP) is another metal-free option. FRP is molded into modern, curved seating and often used in bus shelters or art installations. It is non-conductive, non-allergenic, and fully recyclable. Check that any attachments—like legs or railings—are also made of FRP or coated wood.
Finally, concrete and stone benches are naturally metal-free, though they may have rebar inside for strength. The surface you touch is pure stone, so allergies are not an issue. Just be cautious of embedded metal plaques or handrails, which you can avoid touching.
In summary, for metal-allergic users, the safest urban furniture materials are: HDPE plastic, teak wood, fiberglass, and sealed concrete. Always inspect the actual surface you will contact—if it is a coated material, verify the coating is intact. When in doubt, choose wood or plastic over any metallic-looking finish. Urban designers are increasingly aware of allergen sensitivities, so you will often find clearly labeled hypoallergenic options in new installations.