Interior Sauna Wood Treatment White Oil (Paraffin Oil)

Interior Sauna Wood Treatment White Oil (Paraffin Oil) – 5 Litre

Premium Wood Protection for Saunas – Preserve, Protect & Enhance

The Interior Sauna Wood Treatment White Oil (Paraffin Oil) is the ultimate solution for preserving the beauty, integrity, and hygiene of your sauna. This 5-litre high-grade, medical-quality paraffin oil is designed to create a protective barrier against the damaging effects of sweat, steam, bacteria, and everyday wear, extending the life of your sauna’s wood while maintaining its natural appearance.

Ideal for both residential and commercial saunas, this treatment deeply penetrates wood fibres, preventing discolouration, warping, brittleness, and cracking—all common issues caused by heat exposure and moisture. The oil locks in the wood's natural oils and forms a moisture-resistant seal, significantly reducing the likelihood of cracks forming due to drying and shrinking of the wood over time.

Compatible with all types of sauna wood this fragrance-free, toxin-free, and colourless treatment not only protects but also enhances the natural grain and texture of the wood.

 

Key Features

• Long-Lasting Wood Protection – Shields against steam damage, sweat stains, bacteria, and cracking
• Prevents Wood Cracks & Splits – Locks in moisture, preventing wood from drying out and becoming brittle
• Enhances Wood Grain – Highlights natural beauty while maintaining structural integrity
• Large 5L Bottle – Up to 10 Uses – Lasts for 3 to 10 applications depending on sauna size
• Even Coverage is Essential – Must be applied evenly across the entire sauna interior for full protection
• Versatile Application – Suitable for all sauna woods, including thermo-treated
• Toxin-Free & Fragrance-Free – Safe for users and the environment

 

How to Apply the Interior Sauna Wood Treatment White Oil

1. Preparation:

• Apply the oil ideally within a few days of the sauna being erected to ensure the wood is fully protected from the start.
• Ensure all interior wooden surfaces are clean, dry, and free of dust or debris.
  Wipe down with a damp cloth if necessary and allow the wood to dry completely.

2. Test the Finish: 

• Apply a small amount of oil to an inconspicuous area to preview the final finish before proceeding.

3. Apply the Oil:

• Use a soft sponge, brush, or lint-free cloth to apply a thin, even layer along the wood grain.
• It is essential to spread the oil evenly across the entire interior of the sauna, including:
  • Walls and ceilings
  • Benches and seating areas
  • Floors and backrests
  • Any exposed woodwork or trim
• Do not apply the oil to the exterior wood of the sauna. This treatment is designed specifically for interior use.

4. Number of Coats:

• Residential Saunas: Apply 1 coat for regular home use.
• Commercial Saunas: Apply 2 coats to withstand heavier usage and increased moisture exposure.

5. Absorption & Drying:

• Allow the oil to soak in for at least 1 hour.
• If applying a second coat, wait until the first coat is fully absorbed before reapplying.
• Wipe off any excess oil with a clean cloth after absorption.

6. Final Curing:

Leave the sauna unused for 12-24 hours to allow the oil to fully cure and form its protective layer.

 

Ongoing Maintenance – When to Reapply

Reapplication depends on usage frequency and visible signs of wear.

• Residential Saunas: Reapply approximately once per year or when the wood appears dry, discoloured, or starts absorbing moisture quickly.
• Commercial Saunas: Reapply every 6 months to maintain protection under heavier usage.

 

Signs that indicate reapplication is needed:

• The wood looks dull or dry
• Minor cracks or splintering are visible
• Surfaces feel rougher or more absorbent
• Increased sweat stains or discolouration

 

Why This Treatment Prevents Cracks & Splitting

Repeated exposure to heat and moisture causes sauna wood to expand and contract, leading to drying, shrinking, and eventually cracking. This paraffin oil deeply penetrates wood fibres, replenishing natural oils and maintaining the wood’s flexibility. The result is reduced risk of brittleness and cracking over time. By forming a moisture-resistant seal, the oil prevents uneven drying, which is a leading cause of warping and splits.

Consistent and even application ensures that all areas of the sauna are equally protected, reducing weak spots where cracking is most likely to occur. Neglecting to treat certain sections can lead to unbalanced moisture absorption, increasing the likelihood of damage.

 

Special Considerations for Exterior Wood

Indoor Saunas:

• The exterior wood generally does not require treatment for residential use. However, in commercial settings, where increased humidity and wear may be factors, applying a protective coating to the exterior can help maintain the wood’s appearance and durability. 
• While not essential for most indoor saunas, using a protective varnish can further enhance the wood’s longevity, especially in high-traffic or high-moisture environments.
• We still recommend that you apply this.

Outdoor Saunas:

• For outdoor saunas, applying a weather-resistant coating to the exterior wood is absolutely necessary to protect against the harsh British weather, including rain, UV exposure, and fluctuating temperatures.
• Without proper protection, outdoor wood is at risk of warping, rotting, fading, and general deterioration over time.

To ensure maximum durability and protection, we strongly recommend using Rustins Yacht Varnish for all outdoor saunas.

Rustins Yacht Varnish is a high-performance, weather-resistant varnish designed to shield your sauna’s exterior wood from the elements. Its water-resistant and UV-protective formula prevents the wood from rotting, warping, cracking, and fading, ensuring long-lasting protection while maintaining the sauna’s natural aesthetic.

While it is essential for outdoor saunas exposed to varying weather conditions, Rustins Yacht Varnish can also be applied to the exterior of indoor saunas for added durability and an enhanced finish, especially in commercial settings.

Click Here to View Rustins Yacht Varnish

 

Product Specifications

• Volume: 5 Litres
• Weight: 5 kg
• Coverage: Up to 15-20 m² per coat
• Application Range: 3–10 uses (depending on sauna size)
• Finish: Transparent, Non-Sticky Protective Layer
• Compatibility: Suitable for all sauna woods, including thermo-treated woods

 

Delivery Information

• Free Delivery when ordered with a sauna purchase
• Standalone Orders: £9.99 delivery fee applies
  

 

The Bottom Line

The Interior Sauna Wood Treatment White Oil (Paraffin Oil) is a vital step in ensuring your sauna stays protected, durable, and visually appealing for years to come. By preventing steam damage, bacterial growth, and wood cracking, this treatment extends the life of your sauna while maintaining its natural beauty. Whether you're installing a new sauna or maintaining an existing one, this large 5L bottle provides excellent coverage and long-lasting protection.

For outdoor saunas, it is essential to combine this treatment with Rustins Yacht Varnish to fully safeguard the exterior wood against the elements. While indoor saunas generally do not require exterior treatment, applying yacht varnish can further enhance durability, particularly in commercial or high-moisture environments.

Protect your investment—ensure the longevity of both the interior and exterior wood by using the right treatments for your sauna.