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Shop sauna heatersWhether you’re choosing one component or planning the whole room, small details can become expensive problems once installation begins. We know the products we sell and the questions to ask early, helping catch mismatched components, overlooked requirements, and installation issues while they are still easy to fix.
Our job does not end when your order ships. We stay available through installation and beyond. If something needs attention, we stay involved, work the problem, and help see it through.
We want you to feel good about choosing Sauna Marketplace long after your first session, and confident recommending us to a friend. That standard guides the advice we give, the products we sell, and the way we take care of our customers.
Sauna and heater customers also receive free shipping on sauna accessories for life.
Planning a sauna, or need help with one you purchased from us? Our founders have assembled many of the saunas we sell, visited the manufacturers, and use these products every day. New customers and existing Sauna Marketplace sauna and heater owners can Book a Ben consultation.
Supi is the world’s most trusted interior sauna wax that is used to treat and protect the wood in a sauna. It helps to protect the wood from moisture and heat and can also enhance the natural beauty of the wood. It’s a great product to consider if you’re looking to maintain the longevity and appearance of your sauna. Supi is recommended for thermally modified and raw wood.
$55.00
Buy Now, Pay Later with premium financing packages only available on Sauna Marketplace.
What to consider when planning to wax the sauna?
The current color of the wood on your sauna benches and walls defines how the end result will look. It is worthwhile to do a test round first: get a small can of Supi Saunavaha wax and apply the product on an undetectable spot, for example under the bench, to see how the color appears. The color will look a little different on different wooden surfaces. Usually the safest solution is to choose a shade that is darker than the original wood.
Supi Saunavaha wax is a waterborne protective finish that has three ready-made shades: black, white and gray. The product can also be tinted to any translucent shade from the Interior wood stains and lacquers color card.
How to wax sauna surfaces
Make the preparations
Gather all your tools and materials: Supi Saunavaha, a brush, covering paper and masking tape for covering the floor. Cover the surrounding area. If the benches are detachable, it might be easier to treat them outside the sauna and treat the walls without benches in the way. You can also just leave the benches at their place, cover the benches with plastic and treat the walls first.
Test
Try Supi Saunavaha first on an undetectable spot to test, as wood color might change the final painted color result.

Cleaning and sanding
Wash the benches and walls using Supi Saunapesu. Use rubber gloves to protect your hands. Work with a scouring pad or a brush, especially if the surface has remains of a previous coating. Rinse all surfaces and let dry completely. Sand with fine sandpaper if there is small splinters come out of surfaces. Brush away all the sanding residue.
Important Note: If you are treating an old sauna where has collected more dirt, this cleaning process should be done beforehand. Cleaning thoroughly to remove all dirt from surfaces and heat up sauna properly. Let it dry up the day before waxing.

Wax
Wax the surfaces once with Supi Saunavaha. Use a brush or a sponge brush, work with long strokes in the direction of the grain, with one or two panels at the time.
Drying and repainting
Let the wax dry until the next day. If needed, apply another, moderate layer of wax. Try to avoid thick layers especially on the benches, since a thick foil of wax might make the benches feel hotter than usual when using the sauna.

Enjoy
Heat up the sauna and enjoy!
The colored wax will wear off over time, especially on lower benches. The treatment can be redone anytime with the same instructions as above.
Technical Advisor Mika Siirilä from Tikkurila was consulted for this article.
Whether you’re choosing one component or planning the whole room, small details can become expensive problems once installation begins. We know the products we sell and the questions to ask early, helping catch mismatched components, overlooked requirements, and installation issues while they are still easy to fix.
Our job does not end when your order ships. We stay available through installation and beyond. If something needs attention, we stay involved, work the problem, and help see it through.
We want you to feel good about choosing Sauna Marketplace long after your first session, and confident recommending us to a friend. That standard guides the advice we give, the products we sell, and the way we take care of our customers.
Sauna and heater customers also receive free shipping on sauna accessories for life.
Planning a sauna, or need help with one you purchased from us? Our founders have assembled many of the saunas we sell, visited the manufacturers, and use these products every day. New customers and existing Sauna Marketplace sauna and heater owners can Book a Ben consultation.
PLAN THE WHOLE SAUNA
Start with the room dimensions, then account for glass, masonry, insulation, ceiling height, required clearances, and available electrical service. That is how we move from a product that looks right to a sauna that heats evenly and comfortably.
See electric sauna heaters by output, stone mass, control style, and installation type. Size from adjusted room volume, not floor dimensions alone.
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