Salt Scrubs and Body Treats: Allowed or Not?

Hygiene and shared space

In a sauna, the air is hot, humidity can range from dry to steamy, and you are likely sharing the space with others, whether at home or in a public venue. Introducing salt scrubs or body treatments into that environment means introducing oils, salts, and skin cells into the air and onto surfaces. Sitting on a bench that has oil residue from a previous bather is unpleasant and, in a shared sauna, a hygiene concern. Towel on bench hygiene is a key practice to reduce transfer.

The Cleveland Clinic notes that after a sauna, it is important to shower to remove sweat and salts left on the skin. That recommendation works both ways: anything you apply to your skin before entering the sauna will sweat off and can transfer to benches, walls, and even the heater stones. In a home sauna you control who sits next, but in any shared or commercial sauna, keeping treatments out of the hot room is a matter of courtesy and basic cleanliness.

• Sit on a towel or a sauna seat cover at all times, whether you use treatments or not. This is the single best habit for bench hygiene.
• If you want a salt scrub, do it in the shower before your session, then rinse thoroughly before stepping into the sauna.
• After your session, shower again to rinse off sweat and any residual salts, as recommended by medical sources.

Bench stains and wood protection

Sauna benches are typically made of softwoods like cedar, hemlock, aspen, or spruce. These woods are chosen because they resist heat and stay relatively cool to the touch, but they are porous and not sealed like kitchen countertops. Oils from body treatments, even small amounts, can soak into the wood fibers and leave dark stains that are nearly impossible to remove without sanding. For regular care, sauna cleaner types should be chosen carefully.

Salt itself can leave a white residue that, combined with sweat and oils, can make benches feel gritty and look dingy over time. While plain water and a gentle soap are generally safe for cleaning sauna wood, oil-based residues create a different challenge. Some oils, like mineral oil or paraffin, may actually condition wood, but many cosmetic oils, especially those with essential oils or fragrance, can accelerate the natural darkening that sauna wood undergoes with heat and moisture.

If you must use a body treatment in a sauna, limit it to a small area and place a towel or a dedicated bench mat underneath you. After the session, wipe the bench with a damp cloth and allow it to dry fully. Regular cleaning of benches, as described in the article on sauna cleaners, becomes even more important when body products enter the picture.

Corrosion on heaters and fixtures

Salt is corrosive to metal. While a quick salt scrub in the shower is harmless, introducing large amounts of salt into the sauna environment can create a significant issue. The heater, its guard, and the electrical connections are all metal. Salt that lands on these surfaces can, over time, accelerate rust and corrosion, especially in the presence of high humidity from water poured on the stones.

In traditional saunas, where the heater is exposed, splashing water with dissolved salt onto the rocks and elements is a real risk. In infrared saunas, the emitters are also metal and can corrode if exposed to salty residue. Even in steam showers, where the walls are tiled, the steam generator itself and its copper lines are metal, and manufacturers like Amerec and Mr. Steam recommend regular flushing to prevent scale buildup, a separate issue but one that highlights the importance of keeping the system clean.

The safest rule is to keep all body treatments, especially those containing salt, out of the sauna room entirely. If you use a salt scrub, do it in the shower so the salt goes down the drain, not onto your heater.

What is allowed: water and plain towels

The question of what is allowed in a sauna comes down to the facility's rules and common sense. In a traditional Finnish sauna, the only thing you put on the stones is water, poured with a ladle, to create loyly, the steam that defines the experience. No oils, no salts, no scented mixtures belong on the stones, as they can burn and create smoke or irritate the lungs. Learn more about what is loyly in our dedicated guide.

For body care, the cleanest approach is to use the sauna for its intended purpose, which is heat bathing, and use a towel as a barrier between you and the bench. Some sauna bathers choose to add a small amount of essential oil to a bucket of water used for washing off, but that happens outside the sauna, not in it.

If you are considering an infrared sauna, the rules are similar. Infrared saunas operate at a lower temperature, but the metal emitters are just as vulnerable to salt. The guidance for any sauna is the same: a clean body, a towel under you, and water on the stones if you want steam. This is the approach that keeps benches clean, heaters working, and the experience pleasant for everyone. For more on the differences, see [infrared vs traditional] (/learn/infrared-vs-traditional-which-fits-you/).

• Use a towel or sauna bench cover under you at all times.
• Pour only water on the heater stones. Never add oils, salts, or other substances.
• Shower before and after your sauna session to keep the benches clean and rinse off sweat.
• If you use a salt scrub, do it in the shower, not in the sauna cabin.

Choosing the right gear for your sauna routine

If you are setting up a home sauna and want to keep it in good shape, buying the right accessories makes a big difference. A good sauna towel or a set of bench covers protects the wood and makes cleanup easy. A bucket and ladle for water is essential for traditional saunas. Cleaning supplies, like a mild wood cleaner and a brush, help you remove any residue after sessions. Consider budget-friendly sauna accessories for economical options.

For those who enjoy body treatments, a separate shower or at least a bucket of water to rinse off before entering the sauna is the best approach. You can keep your salt scrub in the bathroom, not in the sauna room. This way, you get the benefits of exfoliation without risking stains or corrosion. If you're short on space, check out best saunas for small spaces for cabin ideas.

What to pick for your use

Questions

Can I use a salt scrub inside a sauna?

It is not recommended. Salt scrubs in the sauna can leave salty residue on benches and the heater, which can cause staining and corrosion. Use the scrub in the shower, then rinse before entering.

Will salt scrub damage my sauna bench?

Salt itself is not the main concern; the oils in the scrub are. Oil can soak into the wood and leave dark stains that are hard to remove. Even a plain salt scrub leaves a gritty residue. A towel under you reduces the risk.

Can salt cause rust on my sauna heater?

Yes. Salt accelerates corrosion on metal. Heater elements and fixtures can rust if salty water is splashed on them. Keep salt and all body treatments away from the heater.

What should I use to clean sauna benches after a session?

A damp cloth or a mild soap solution works for most residue. For oil stains, you may need a wood cleaner designed for saunas. Avoid bleach or chlorine, which can damage the wood. See the article on sauna cleaners for details.

Is it okay to throw essential oils on the sauna stones?

No. Water is the only liquid that should go on the stones. Essential oils can burn, produce smoke, and damage the heater stones. They also leave an oily residue that is hard to clean.

Do infrared saunas have the same risk from salt scrubs?

Yes, although the mechanism is slightly different. Infrared emitters are metal and can corrode if exposed to salt or moisture. Additionally, the lower temperature means oils are less likely to vaporize, so they tend to sit on the bench and walls. Keep treatments out of infrared saunas as well.