316L surgical steel survives daily water without any care at all, and solid 18K gold plating over that steel handles showering, swimming and the gym. Sterling silver and plated brass do not: both tarnish with repeated exposure. The things that actually damage jewellery are not water but chlorine left to dry on the metal, sunscreen, perfume and household cleaners.
What follows is situation by situation, because "waterproof" is used loosely in this industry and the differences between a shower, a chlorinated pool and a sauna are real.
What water actually does to jewellery
Clean water on its own is close to harmless. What causes damage is what is dissolved in it, and what happens when it dries. Three separate mechanisms are at work. Corrosion is a chemical attack on the metal itself — chlorine and salt do this. Tarnish is a surface reaction, usually with sulphur compounds in air, sweat and cosmetics; that is what turns silver grey and brass green. Plating wear is mechanical: the gold layer is thin, and it is friction rather than moisture that removes it.
That distinction matters: tarnish polishes off, corrosion does not, and nothing brings back plating once it has worn through. Which is why abrasive cleaning is the worst thing you can do to a plated piece.
The shower: soap and shampoo
The safest of the six situations. Tap water is neutral and the temperature is irrelevant to any of these metals. The one real effect is film: soap, shampoo and conditioner leave a residue in the gaps between links, and over weeks that dulls the shine without damaging anything underneath. On a tight Cuban or rope chain it shows as a slightly grey look rather than a bright one.
316L steel and 18K plating over steel come through fine. Sterling silver slowly darkens, partly from the water and partly from sitting wet in a humid bathroom. Plated brass is where showering does genuine damage: water finds the pores in the plating, reaches the brass, and the copper reacts — that is the green mark on skin people associate with cheap jewellery. The fix for the rest is one rinse and a dry cloth per week, worked between the links.
The pool: chlorine
Chlorine is the most aggressive thing your jewellery meets in ordinary life, more so than sea water despite feeling milder. 316L is a specifically chloride-resistant alloy — the molybdenum in it is there for exactly this reason, which is why it is used in marine and surgical settings. It handles a swim without complaint. Gold plating over 316L is also fine in the water itself.
The mistake is what happens afterwards. As chlorinated water evaporates, the chlorine concentrates on the surface. A chain left to dry on a towel sits under a far stronger concentration than it met in the pool, and repeated weekly for a year even good steel can pit.
Sterling silver reacts quickly and visibly to chlorine, and plated brass should simply not go in a pool.
Rinse under fresh water within an hour of getting out, then dry. That single habit removes almost all of the risk.
The sea: salt
Salt water is corrosive but more predictable than chlorine. Again the damage happens during drying, when salt crystallises in the crevices of a chain and holds moisture against the metal. 316L handles sea water well. Plating over steel is fine as long as you rinse; what you want to avoid is sand, because grit between links is abrasive and abrasion is what removes plating. Rinse thoroughly enough to get the grit out, not just the salt. Sterling silver survives a single swim but tarnishes with repeated exposure, and plated brass corrodes.
The gym: sweat
Sweat is mildly salty and mildly acidic, and it is daily rather than occasional. Steel and plating over steel handle it; sterling silver tarnishes faster from sweat than from any other everyday exposure, because skin contact is continuous. The bigger gym risk is mechanical: a chain caught on a bar, a bracelet ground against a knurled dumbbell handle. No material solves that — take the bracelet off or accept the marks.
The sauna: heat
The metals are unbothered by sauna temperatures. Your skin is the limiting factor, not the jewellery — a thick chain heats up and becomes uncomfortable against bare skin, particularly a wide 8 mm link.
The genuine sauna problem is heat plus sweat over a long period, which accelerates tarnish on silver and brass. If you use a sauna weekly, that alone is an argument against silver as a daily piece.
Sleeping
Not a water question, but it belongs in the same decision: people who want a shower-safe chain usually want a never-take-it-off chain. Materially nothing happens overnight. The risk is mechanical — a fine 2 mm chain can kink if it twists under your weight, and a clasp can catch on bedding. A bracelet is a poorer sleeping companion than a chain, because your wrist bends against the mattress all night.
The comparison table
| Situation | 316L surgical steel | 18K gold plated over steel | Sterling silver (925) | Plated brass |
|---|---|---|---|---|
| Shower (soap, shampoo) | Yes, no care needed | Yes; rinse and dry weekly to keep the shine | Tolerated, but darkens over time | No; water reaches the brass and it reacts |
| Pool (chlorine) | Yes; rinse afterwards | Yes; rinse within the hour, then dry | No; reacts quickly and visibly | No |
| Sea (salt) | Yes; rinse afterwards | Yes; rinse the sand out, not just the salt | Occasional only; tarnishes if repeated | No |
| Gym (sweat) | Yes | Yes; watch for abrasion on bars, not moisture | Tarnishes faster than anywhere else | No |
| Sauna (heat) | Yes; can get hot to the touch | Yes; can get hot to the touch | Tarnish accelerates in heat and sweat | No |
| Sleeping | Yes; risk is kinking on fine links | Yes; risk is kinking on fine links | Yes, but tarnishes from skin contact | Not advisable |
| Sunscreen and perfume | Fine, but wipe off residue | Avoid direct contact; apply first, dress after | Causes visible dulling | No |
| Household cleaners, bleach | Avoid | Avoid | Avoid | Avoid |
The things that genuinely do damage
These three shorten the life of a plated piece far more than water does.
Sunscreen leaves oils on the plating that attract grit, and some formulations dull the finish directly. Perfume and aftershave are worse: alcohol sprayed at the neck lands straight on the chain. Both follow the same rule — cream or fragrance first, jewellery after. Cleaning products are the real killer: bleach, oven cleaner and descaler do more damage in one afternoon of housework than a year of showering. Wear gloves or take the piece off.
None of these are water. If someone says their chain "died in the shower", the sequence was usually shower, then aftershave straight onto wet metal.
How to rinse properly after chlorine or sea water
It takes under a minute. Hold the piece under a running lukewarm tap and let the water flow along the whole chain rather than at one spot, working the links between your fingers so water reaches the gaps where salt and sand hide. Pay attention to the clasp — that is where residue collects and where a chain most often fails.
Then dry it with a soft cloth and let it finish in open air, not a sealed pouch. Do not use toothpaste, baking soda, silver dip or an ultrasonic cleaner on a plated piece: all of them attack the plating.
What we actually sell, and where we do not fit
DeRuiterDR — men's jewellery in 316L surgical steel and 18K gold plating, waterproof, with a lifetime warranty, shipped from the Netherlands/Europe. That warranty covers discolouration, the failure mode that matters with plated jewellery. It does not cover scratches or dents, and no honest brand's does.
For a piece you never take off, a 5 mm Cuban chain at €59 or a 5 mm Rope chain at €59 are wide enough not to kink overnight, with a matching 5 mm bracelet at €49. For a pendant, the small cross at €59 suits a 50 or 55 cm chain. The full range sits in the bestsellers collection.
Where we are not the answer: if you want solid gold or solid sterling silver as a material, we do not make it. Steel with plating is a different proposition — more durable in water, less valuable as metal.
Frequently asked questions
Can I shower with stainless steel jewellery every day?
Yes. 316L is unaffected by tap water, soap and shampoo. The only build-up is a soap film between the links, which comes off with a rinse and a dry cloth once a week.
Will gold plated jewellery come off in the shower?
Not from the water itself. Plating over steel wears through friction, not moisture, so the risks are abrasive cleaning, sand and grit. Keep sunscreen and perfume off it and it will hold.
Is 316L stainless steel really waterproof?
It resists corrosion in fresh, chlorinated and salt water, which is why the alloy is used in marine and surgical settings. Rinsing after chlorine or the sea is still worth doing, because residue concentrating during drying is harsher than the water was.
Why does my sterling silver chain go black?
Sulphur compounds in air, sweat and cosmetics react with the silver surface. It is tarnish, not damage, and it polishes off — but it comes back, which is why silver is a poor choice for a piece you never remove.
Can I wear my chain in the sauna?
Steel and gold plated steel are unaffected by sauna heat. The practical issue is that thick metal gets hot against bare skin, so a wide 8 mm link is less comfortable than a 5 mm one.
What should I do after swimming in the sea?
Rinse under a fresh tap within an hour and dry it, working the cloth into the links and the clasp. Getting the sand out matters as much as the salt, because grit is abrasive.
Does sweat damage men's jewellery?
Not steel or plating over steel. Sweat tarnishes sterling silver faster than almost anything else, because skin contact is continuous. In the gym the real risk to any material is knocking it against equipment.
Can I sleep in a chain?
Materially yes. Very fine 1.5 to 2 mm chains can kink if they twist under your weight, so a 3 to 5 mm link is safer overnight. Bracelets sleep less comfortably than chains.
If you want jewellery that stays on through the shower, the pool and the gym, open the bestsellers collection and choose your length in cm. If the size is wrong when it arrives we will exchange it free, and the parcel stays inside the EU, so there is no customs paperwork on either leg.