Determine the woodwork you will want to treat. It is best to leave the walls and ceiling unfinished. This helps prevent decay in the walls and promote the arid quality desired of the sauna. Doors, floors and seats are most often treated to help prevent dirt and oil residue from contact.
Pour linseed oil, or brand finish, into the bucket. The best brands are Tongue and Danish, according to Art at AlmostHeaven.net. If you are buying other brands, be sure they are non-toxic.
Apply two to three thin layers of the oil to the woodwork.
Heat the sauna so the oil will dry.
Things You Will Need
- Non-toxic linseed oil finish
- Never use pressure-treated wood in your sauna. This could lead to toxic fumes.