Rubio Monocoat: When is a Second Coat Necessary and How to Do It Right

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Rubio Monocoat is a favorite wood finish among woodworkers because of its durability and single-coat application. Its protective features and natural finish are undeniable, yet the question persists: is a second coat ever necessary?

Let’s address the conditions that warrant a second coat, the proper application methods, and the pitfalls to steer clear of, ensuring your projects retain both their beauty and resilience.


A second coat of Rubio Monocoat is advised if the first coat is uneven, the wood is in high-traffic areas, or you desire a deeper color.

When is a Second Coat of Rubio Monocoat Necessary?

Rubio Monocoat excels with a single coat, but certain situations may benefit from a second. Consider a second coat if:

  • Rapid Absorption in Softwoods: A second might be necessary for uniformity if softwoods absorb the first coat unevenly.
  • High-Traffic or High-Use Areas: Projects in busy areas might need a second coat for extra protection.
  • Desire for a Deeper Color or Smoother Finish: A second coat can deepen the color and enhance the texture.

Evaluate the wood after the first coat and consider your project’s needs. A patch test is wise before a second application.

How To Apply A Second Coat Of Rubio Monocoat

A second coat of Rubio Monocoat needs precision, not just more product.

Follow these steps for optimal results:

  1. Check the First Coat: Wait for 24-36 hours until the first coat cures. The surface should be dry and non-tacky.
  2. Prep the Surface: Lightly buff with a fine sanding pad and clean off the dust. This preps the already coated surface.
  3. Mix the Product: For Rubio Monocoat 2C, mix parts A and B as instructed, usually in a 3:1 ratio. Mix well.
  4. Apply the Second Coat: Use less product this time. Spread it evenly with a brush or cloth for a uniform layer.
  5. Remove Excess Product: Wipe off any surplus within 15 minutes to avoid drying issues.
  6. Let it Dry: It takes up to 36 hours to fully cure. Keep the surface undisturbed.
  7. Assess the Outcome: Once dry, check the finish. If it looks even and offers better color depth and protection, your application was successful.

Don’t apply too thickly; Rubio Monocoat works best in thin layers. Patience and adherence to directions are your best tools.

Calculating the Quantity for Your Second Coat

Applying a second coat of Rubio Monocoat requires less product than the first.

  1. Reduced Absorption: The wood’s pores are partly filled after the first coat, decreasing the amount needed for the second.
  2. Fine-tuning, Not Saturation: The second coat addresses minor imperfections and enhances color, not saturate. You’ll need about 30-50% less product than the initial coat.
  3. Avoid Overapplication: Excess products can cause issues like uneven finishes or extended drying times. Aim for a thin layer.

Check the product’s instructions for precise quantities, considering your project’s surface area. A lighter application is key for the second coat.

How Long To Wait Between Coats

The waiting period between the first and second coats of Rubio Monocoat is crucial for optimal results.

  1. Curing Time: The first coat is completely cured before applying the second. Typically, this takes 24-36 hours, depending on factors like humidity, temperature, and wood type.
  2. Assess the Surface: The first coat should be dry and non-tacky to the touch. Any wet or sticky areas suggest more drying time is needed.
  3. Don’t Rush: Applying the second coat too soon can hinder proper adhesion and affect the finish’s durability and appearance.

Recommended Rubio Monocoat Products

Avoid These Common Mistakes When Applying a Second Coat

Applying a second coat of Rubio Monocoat can enhance the durability and aesthetic of your wood projects, but the process does require precision and awareness.

Here are common mistakes to avoid:

Common MistakesConsequencesHow to Avoid
Applying Too SoonCan lead to a tacky surface and uneven finish.Wait for the first coat to fully cure (24-36 hours).
Insufficient Surface PreparationSecond coat may not adhere well, creating patchy areas.Buff the surface lightly and clean thoroughly before application.
Incorrect Mixing RatiosAffects the finish’s durability and drying time.Follow the manufacturer’s instructions for the mix.
Applying Too Much ProductLeads to prolonged drying times, uneven sheen, or difficulty curing.Apply the product in a thin, even layer.
Not Removing ExcessCan result in a sticky residue and compromised finish.Ensure all excess product is removed within 15 minutes of application.
Rushing the Curing ProcessMay cause defects like cracking or bubbling.Allow the product to cure naturally, without excessive heat or airflow.
Skipping the Patch TestUnexpected results in the final look.Always conduct a patch test in an inconspicuous area.

Adhering to the product’s guidelines, you can ensure a flawless application of your second coat, resulting in a beautiful, long-lasting finish for your projects.

How to Maintain Your Rubio Monocoat Finish for Longevity

Preserving your Rubio Monocoat finish is crucial for its enduring beauty.

Here’s how to keep it in top condition:

  • Regular Cleaning: Use a dry or damp cloth daily. For deeper cleans, Rubio Monocoat Soap is ideal. Avoid harsh chemicals.
  • Handle Spills Promptly: Clean spills immediately to avoid stains or damage.
  • Fix Scratches: For minor scratches, lightly sand the area and reapply Rubio Monocoat Oil Plus 2C.
  • Periodic Maintenance: Use Rubio Monocoat Refresh for restoration, especially in high-traffic areas.
  • Preventive Measures: Protective pads and coasters prevent physical or heat damage.
  • Monitor Sun Exposure: Limit direct sunlight. Use curtains or UV-resistant films, or Rubio Monocoat’s Sunprimer for outdoors.

While a second Rubio Monocoat coat isn’t always essential, it’s beneficial in some cases.

If it suits your project, apply it with precision. Proper application and maintenance are key to getting a great finish.

2 thoughts on “Rubio Monocoat: When is a Second Coat Necessary and How to Do It Right”

  1. I appreciate the information. I used Rubio for the first time on a walnut table project and I find that the finished surface is still a bit rough. Before applying I sanded to a 180 grit following the advice of a few other sites. The rubio went on easy and has a consistent look, but ultimately, I’m not thrilled with the feel of the surface as it still feels a bit like untreated wood.
    I’m curious if you have thoughts or experience lightly sanding down to a 220 or 320 before applying a second coat or applying maintenance oil. I tried it on a test piece and it seems to have worked well, but I’m not as confident about a trying it on the finished piece.

    • You can apply a second coat, but the feel will be about the same. It adds a little more protection, but won’t change the feel. You don’t need to sand down if you don’t want, but it doesn’t hurt to. The maintenance oil will help with the sheen a bit, but won’t make the wood feel like a polyethene (film) finish would. Hope that helps!


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