Revitalize Your Wood with Sikkens Proluxe Cetol 23 Plus Re Top Coat

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Sikkens Proluxe Cetol 23 Plus is a finish coating for use over Cetol 1 Primary Coat RE on exterior logs. PPG Proluxe 23 Top Coat RE wood finish enhances wood grain with rich color and signature matched to 1 Primary Coat RE. This high-performance exterior wood stain and finish is designed for durability, UV protection, and weather resistance.

All Sikkens Proluxe colors in stock and ships same day 8-5 EST

Previously known as Sikkens Cetol 23 Plus Finish, this premium wood stain system by Akzo Nobel (Manufacturer of Sikkens) has been transitioned after the sale of their North American Architectural Coatings division to PPG. Since 2017, the PPG ProLuxe product line has contained all of the same Sikkens-ProLuxe products and formulas, now showcasing the updated PPG ProLuxe name, new packaging featuring the PPG logo, the removal of the Sikkens name, and renamed as PPG Proluxe 23 Top Coat RE – a high solids alkyd with a translucent and transparent satin finish ideal for logs and other exterior wood surfaces.

Performance highlights of PPG 23 Topcoat

• 2 coat application in a 3-coat system with Cetol 1 Primary Coat RE
• Resilient alkyd formula resists cracking and peeling, ensuring even wear on exterior wood surfaces
• Provides a mildew-resistant wood stain finish utilizing iron oxide pigments for enhanced durability and a natural oak or teak appearance
• Base coat application in a 3-coat wood stain system with 23 Top Coat RE for superior protection
• Powerful UV absorbers provide UV protection for both color retention and the wood substrate
• Water repellent properties help protect against moisture intrusion
• Excellent block resistance against surface abrasion and handling
• An alternative to Door & Window formulations for additional color options
• An alternative to Log & Siding systems for enhanced exterior finishes
• Can be used on garage doors, entrance doors, and window trim for a uniform look
• Once the desired color is achieved, the 3rd coat can be Cetol Maintenance for a clear maintenance coat

Preparation Procedures for New, Weathered and Uncoated Wood

The best method to prepare vertical wood surfaces is to sand with 80 - 120 grit sandpaper. However, the following preparation may be used as an alternate to sanding: Spray the surface with clean water, thoroughly wetting the wood.

• It is recommended to clean the surface with a deck cleaner or stripper.
• Apply this cleaning solution generously to the wood with a garden pump sprayer.
• Let the solution sit on the wood for 15 - 20 minutes.
• During this period, scrub the surface with a hard bristle brush to help remove mill glaze and/or weathering.
• Do not let the solution dry on the wood.
• Keep Sikkens Proluxe Cetol 23 Plus RE Exterior Top Coat, now marketed as PPG Proluxe, wet as you’re working. Work on the sides opposite of the sun where possible.
• Power wash the cleaning solution from the wood with clean water. To prevent damaging the wood, do not exceed 500 PSI and keep the nozzle a maximum of one (1) foot from the surface for full effectiveness.
• Let the surface dry for three (3) days before application (i.e. ensuring the moisture content is below 18%).

For weathered gray wood, or wood affected with blue fungi or rust from nails, treatment following cleaning with Sasho CPR Log Cleaner and Brightener is advised. After treatment, allow the surface to dry for three (3) days. Fill all joints, cracks, and nail holes with a high quality Conceal color matching caulk and let cure prior to applying the coating system. Refer to the caulk/filler manufacturer for proper application instructions.

Pervious log homes with the Sikkens Cetol system may need to be corn blasted to remove Sikkens film forming stain before the application of the new coating system.

Application for Pine, Spruce, Cedar and other logs with Sikkens 23 Plus Topcoat

Standard Application Procedure: It is always recommended to perform a three (3) coat color and sheen test on a sample of the wood to ensure compatibility with different application methods. Color can vary with application method, porosity, type of wood such as mahogany, and the use of iron oxide pigments. Intermix batches to ensure color consistency. After proper preparation, apply three (3) coats of Proluxe Cetol 1 and Cetol 23 Plus, assuring a thorough drying time (minimum 24 hours) between each coat.

• If possible, back prime with the first coat. During application, saturate all end grains, nail holes, cavities, and cracks in the wood with Sashco Log Builder or Conceal color matching caulk specifically formulated to match Sikkens Log and Siding colors.
• Brush on a liberal coat and maintain a wet edge to prevent lap marks. A recommended natural bristle brush with a handle allowing for pole extension is ideal.
• Brush in the direction of the wood grain, especially when working with teak, beginning at one end of the board or log and continuing to the other.
• The first coat of any Cetol system should be applied from the bottom up to avoid drip marks that may streak adjacent surfaces.
• Follow the recommended maintenance procedures and schedule to ensure lasting performance.
• Cetol Log & Siding is compatible when applied over an existing Cetol 1 and Cetol 23 Plus system; proper UV exposure is required for curing.
• On the side that gets the least sun, you can use Cetol Maintenance Clear.

For added wood protection against woodpeckers and insects, add Walla Walla Bug Juice to the stain.

Important Pre-Application Note

Do not apply any Sikkens Cetol system over a fresh, borate-treated wood surface. Allow the borates to diffuse into the wood cells by permitting a six (6) month exposure time (12 months for green logs) before the application of Cetol 1 23 Plus. To prevent borates from leaching out of the exterior surface, we recommend the application of Sikkens Log Pre-Treatment over the borate treatment. Before applying the Sikkens Log Pre-Treatment, allow the borate treatment to dry for three (3) good, sunny days. Just prior to applying the appropriate Cetol system, the log surface must be cleaned thoroughly in accordance with the Sikkens preparation procedures. Always follow the borate treatment manufacturer’s recommendations.

Maintenance Procedure and Schedule: Proper maintenance starts with a visual inspection. A general guideline is two (2) - three (3) years on the south and west exposures and three (3) - four (4) years on the north and east exposures. However, due to variability in weathering, exposure conditions, altitude, and application techniques, maintenance may be needed sooner if necessary.

Sikkens Proluxe 23 Plus Log Application Procedure

For Kiln-dried or Air Dried Logs: It is recommended to perform a two (2) coat color and sheen test on a sample of the wood. Color can vary with application method, porosity, and type of wood. Generally, the moisture content of these logs is below 18%, though some may be higher. In such cases, applying Sikkens Log Pre-Treatment and then allowing a six (6) month drying period before applying the Cetol 1 23 Plus system is advised. Follow the preparation procedure before applying the first coat of Cetol 1.

During application, saturate all end grains, nail holes, cavities, and translucent cracks in the wood. Brush on a liberal coat and maintain a wet edge to prevent lap marks. Always brush in the direction of the wood grain, starting at one end of the board or log and continuing to the other.

Sikkens Proluxe Cetol 23 Plus RE Exterior Top Coat

For the best results, the first coat of any Cetol system should be applied from the bottom up to avoid drips that may streak on the surface below. Follow the recommended maintenance procedures and schedule. For green, wet, or treated logs, it is advised to perform a three (3) coat color and sheen test on a sample of the wood since these natural oak logs typically have a moisture content greater than 18%. In this instance, apply Sikkens Log Pre-Treatment and allow a one (1) year drying period before applying Cetol 1 23 Plus. Follow the preparation procedures before applying the first coat of Cetol Primary 1. During application, saturate all end grains, nail holes, cavities, and cracks, then brush on a liberal coat, maintaining a wet edge to avoid lap marks. Continue to brush in the direction of the wood grain from one end to the other.

Clean Surface Before Using Sikkens Proluxe Cetol 23 Plus

Before applying a maintenance coat, prepare the surface using the aforementioned cleaning solution but reduce the amount to two (2) ounces of 100% powdered Tri-Sodium Phosphate (or a phosphate-free substitute). Allow the surface to dry for three (3) days after power washing. Then, apply one (1) coat of Cetol 1 Primary or Cetol Maintenance for a clear top maintenance coat.

We cannot ship Proluxe 23+ Top Coat to these Counties in California:

ALAMEDA, CONTRA COSTA, EL DORADO, FRESNO, IMPERIAL, KERN, KINGS, L.A., MADERA, MARIN, MERCED, MONTEREY, NAPA, ORANGE, PLACER, RIVERSIDE, SACRAMENTO, SAN BENITO, SAN BERNARDINO, SAN DIEGO, SAN FRANCISCO, SAN JOAQUIN, SAM MATEO, SANTA BARBARA, SANTA CLARA, SANTA CRUZ, SOLANO, STANISLAUS, SUTTER, TULARE, VENTURA, YOLO and YUBA

Where to buy Sikkens Proluxe Stain

APPLICATION: CAUTION: Surfaces are slippery when wet. Use caution when walking on wet surfaces during application. Test the wood for absorbency by sprinkling water on the surface—if water is absorbed within 30 seconds to 2 minutes (depending on the climate), the surface is ready for finishing. If water is not absorbed, wait 30 days and re-test.

1. Before starting, test your color choice on a small area, applying all coats required.
2. Purchase sufficient product for the entire job and intermix all product together before starting to avoid color variance.
3. Stir thoroughly before and periodically during application.
4. Do not thin the product.
5. Apply when air and surface temperatures are between 50°F (10°C) and 90°F (32°C).
6. Do not apply in direct sunlight or if rain, snow, heavy dew, or temperatures below 40°F (4°C) are expected within 48 hours.
7. Brushing is the preferred method of application methods, using a natural bristle brush. If applied by roller or airless sprayer, back brush immediately to ensure penetration and avoid an uneven finish. For airless spray, use a .011-.015 tip at 700-800 psi and adjust pressure as needed.
8. Apply one even coat of 1 Primary Coat RE Wood Finish, avoiding a heavy application.
9. Allow the coat to dry for a minimum of 24 hours.
10. Top coat with two coats of 23 Top Coat RE following label application directions.
11. Apply in the direction of the grain.
12. To avoid lap marks, start at one edge and follow through to the end of each board, maintaining a wet edge.
13. Coat all end grains and then, if possible, the back of all boards.
14. Since outdoor furniture and fences are considered high-moisture environments, applying a finish like PPG ProLuxe with its added UV protection—along with two coats of 1 Primary RE Wood Finish—is the best method for long-term protection.

Drying Time of Sikkens Proluxe Cetol 23 Plus

• Typically dries to the touch in approximately 12 hours. Generally, it is ready for recoat in 24 hours; however, additional coats may increase drying times. Low temperatures, high humidity, thick films, or poor ventilation will further increase these times. Avoid heavy abrasions immediately following application.

Coverage of PPG 23 Topcoat

• Overall on rough and weathered surfaces, coverage is approximately 200-300 sq ft/gallon (5-7 m²/L).
• On smooth surfaces or hardwoods, coverage is approximately 250-350 sq ft/gallon (6-9 m²/L).
• Actual coverage of PPG ProLuxe may vary based on application conditions and the wood’s porosity.

Cleanup of PPG ProLuxe 23 Topcoat

• Clean tools immediately with mineral spirits or an appropriate paint thinner.
• Clean spills promptly with a cloth to prevent staining.

Shelf Life of Sikkens Proluxe Cetol 23 Plus

• PPG Sikkens Primary 1 Coat RE, when unopened, generally has a shelf life of 5 years. Once opened—unless it is poured into a metal container with little or no air—it will reliably last up to a few years.

Where to buy Sikkens Proluxe Stain

Shelf Life

PPG Primary 1 Coat RE, when unopened, has a shelf life of 5 years. Once opened, unless it is poured into a metal container with minimal air exposure, it will remain usable for up to a few years.

PPG Primary 1 Coat RE Color Codes:

• SIK43005 NATURAL OAK 005
• SIK43009 DARK OAK 009
• SIK43045 MAHOGANY
• SIK43072 BUTTERNUT 072
• SIK43077 CEDAR 077
• SIK43078 NATURAL 078
• SIK43085 TEAK 085

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Real-World Case Studies and Testimonials

Transforming a Weathered Log Home

After years of exposure to harsh mountain weather, the Johnson family’s log home had lost its luster. Fading, cracking, and water stains were visible across the exterior. Seeking a long-lasting solution, they chose Sikkens Proluxe Cetol 23 Plus RE Top Coat after thorough research and professional recommendations.

Process:

• The logs were thoroughly cleaned and sanded to remove old finishes and debris.
• A base coat of Cetol 1 RE was applied, followed by two coats of Cetol 23 Plus RE.
• The family used natural bristle brushes for even application and allowed proper drying time between coats.

Results:

• The home’s natural wood grain was beautifully enhanced, with a rich, warm finish that revived its original charm.
• Two years later, the finish remains vibrant and water-repellent, with no signs of peeling or fading.
• The Johnsons report minimal maintenance and are delighted with the product’s durability.

“We’re amazed at how our home looks brand new again. The finish has held up through snow, rain, and intense sun. We highly recommend Sikkens Proluxe Cetol 23 Plus RE to anyone who wants lasting beauty and protection.”
— The Johnson Family, Colorado

Professional Contractor Testimonial

Mike Reynolds, a professional wood restoration contractor, has used Sikkens Proluxe Cetol 23 Plus RE on dozens of projects, from cedar siding to teak patio furniture.

“This top coat consistently delivers outstanding results. Clients love the deep, translucent finish, and I appreciate how easy it is to apply and maintain. It’s my go-to recommendation for exterior wood surfaces.”

Maintenance Schedules and Long-Term Care

Proper maintenance ensures that your Sikkens Proluxe Cetol 23 Plus RE Top Coat continues to protect and beautify your wood surfaces for years. Here’s a recommended schedule and care guide:

Annual Maintenance Checklist

• Visual Inspection: Walk around your property each spring and fall. Look for signs of wear, such as dullness, cracking, or water absorption.
• Cleaning: Gently wash surfaces with a mild cleaning solution and soft brush to remove dirt, pollen, and mildew. Avoid harsh chemicals or pressure washing, which can damage the finish.
• Touch-Ups: Address small scratches or worn areas promptly by lightly sanding and applying a thin coat of Cetol 23 Plus RE.

Recoating Schedule

• Vertical Surfaces (Siding, Trim): Plan to recoat every 2–3 years, or sooner if you notice significant fading or loss of water repellency.
• High-Exposure Areas (South/West Facing, Log Ends): Inspect more frequently and recoat as needed, as these areas endure more intense weathering.
• Horizontal Surfaces (Railings, Deck Tops): These may require annual touch-ups due to increased exposure to sun and moisture.

Long-Term Care Tips

• Maintain Proper Drainage: Ensure gutters and downspouts direct water away from wood surfaces to prevent moisture buildup.
• Trim Vegetation: Keep plants and shrubs trimmed back to allow airflow and reduce mildew risk.
• Avoid Trapping Moisture: Do not lean objects against finished wood, and allow surfaces to dry thoroughly after rain.

By following this maintenance schedule and caring for your wood, you’ll extend the life and beauty of your Sikkens Proluxe Cetol 23 Plus RE Top Coat, ensuring your investment remains protected for years to come.

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