At Superfloor Australia, we know that sealing polished concrete floors is essential for maintaining their beauty and durability.
A properly sealed floor not only enhances its shine but also protects against stains, moisture, and wear. In this guide, we’ll walk you through the process of sealing your polished concrete floor for lasting results.
Get ready to transform your space with a floor that’s not just stunning, but built to withstand the test of time.
Why Seal Polished Concrete Floors
Sealing polished concrete floors transforms a good-looking surface into a stunning, long-lasting masterpiece. This process enhances both beauty and functionality, making it a smart investment for any space.
Stain and Moisture Defence
Unsealed polished concrete remains vulnerable to stains and moisture damage. Liquids can penetrate the pores, causing discolouration and potential structural issues. A high-quality sealer acts as a protective barrier, repelling liquids and preventing surface penetration. Polished concrete is highly resistant to scratches, stains, and surface damage, providing long-lasting performance. This protection proves particularly valuable in areas prone to spills (such as kitchens or industrial spaces).
Amplified Aesthetics
Sealing doesn’t just protect – it enhances. The right sealer deepens the concrete’s colour, bringing out rich tones and subtle variations in the aggregate. It also adds a lustrous sheen that catches the light, turning your floor into a true focal point. Many property owners express amazement at how sealing elevates the entire look of a room. By applying a high-quality sealer, you can effectively deter colour fading caused by harsh weather conditions, UV rays, and general wear and tear.
Longevity and Cost-Effectiveness
Sealing pays off in the long run. Sealed floors resist wear and tear significantly better, reducing the need for frequent repairs or replacements. Generally, with proper care and maintenance, a grind and seal concrete floor can last 2 to 5 years before resealing, compared to 5-10 years for unsealed surfaces.
Easier Maintenance
Sealed polished concrete simplifies cleaning tasks. Dust, dirt, and spills remain on the surface instead of getting trapped in the pores, making them easy to wipe away. This not only saves time but also reduces the need for harsh cleaning chemicals that could potentially damage the floor over time.
Health Benefits
For those concerned about indoor air quality, sealed concrete offers an excellent choice. The smooth, sealed surface doesn’t harbour dust, allergens, or mould, contributing to a healthier indoor environment. This benefit proves especially valuable for people with allergies or respiratory issues.
Now that we understand the importance of sealing, let’s explore how to prepare your polished concrete floor for this essential process. Proper preparation ensures optimal sealer adhesion and long-lasting results.
How to Prepare Your Concrete Floor for Sealing
Deep Cleaning: The Essential First Step
Start with a thorough clean. Use a pH-neutral concrete cleaner and a stiff-bristled brush to remove dirt, grease, and existing sealants. For stubborn stains, apply a poultice made from baking soda and water. Rinse the floor completely and allow it to dry. A wet/dry vacuum can accelerate this process.
Tackle Cracks and Imperfections
Inspect your floor for damage. Fill small cracks (less than 1/8 inch wide) with a concrete patching compound. For larger issues, use an epoxy filler. Once dry, sand any repairs to make them flush with the surrounding concrete. This step is vital – even minor flaws can undermine your sealer’s effectiveness.
The Importance of Proper Drying
Patience is essential when it comes to drying time. Allow at least 24 hours for your floor to dry completely after cleaning and repairs. Use fans to improve air circulation, but avoid direct heat sources as they can cause uneven drying. A moisture meter can help you determine if your concrete is truly dry enough for sealing. Try to achieve a moisture content below 4.5% for optimal results in most ambient conditions.
Test for Sealers and Contaminants
Before applying a new sealer, test for the presence of old sealers or contaminants. Sprinkle water on the concrete surface. If it beads up, a sealer is likely present and must be removed. Use a concrete stripper to remove old sealers (following the manufacturer’s instructions carefully).
Final Preparation Steps
Vacuum the floor to remove any remaining dust or debris. Use a tack cloth to pick up fine particles. Ensure the room is well-ventilated and maintain a consistent temperature (ideally between 50-90°F) during the sealing process.
With your floor now properly prepared, you’re ready to move on to the actual sealing process. The next section will guide you through selecting the right sealer and applying it correctly for a flawless finish.
How to Apply Concrete Sealer Like a Pro
Selecting the Right Sealer
We recommend a penetrating sealer with a matte finish for indoor polished concrete. Acrylic concrete sealant is best suited to residential concrete floors, such as polished concrete kitchen floors, concrete benchtops, or basement floors. For outdoor areas or high-traffic zones, a more robust topical sealer creates a protective film and can enhance the concrete’s colour.
Water-based sealers have gained popularity due to their low VOC content and easy application. Solvent-based sealers offer superior penetration and durability. Consider your specific requirements and environmental concerns when making your choice.
Application Techniques
Divide your floor into manageable sections to prevent overlap and ensure even coverage. Use a low-pressure sprayer or a microfibre mop for application. Pump-up or low-pressure sprayers are best for applying one-part, solvent-based sealers with a solids content below 35%. Start at the farthest corner from the exit and work your way out.
Apply thin, even coats. Over-application can lead to bubbling or peeling. Two thin coats are always better than one thick coat. Allow each coat to dry completely before applying the next (typically 2-4 hours, but always check the manufacturer’s instructions).
For larger areas, a pump sprayer provides more efficient application. This method offers consistent coverage and reduces fatigue during the sealing process.
Avoiding Common Pitfalls
Temperature and humidity significantly impact sealer application. The best temperature to apply a concrete sealer is 55-85 degrees Fahrenheit. Applying sealer in direct sunlight or on hot surfaces can cause it to dry too quickly, leading to improper curing.
Ensure proper ventilation during and after application (especially important for solvent-based sealers). Use fans to circulate air, but avoid directing them at the freshly sealed surface to prevent dust from settling.
Don’t rush the process. Allow ample time for each coat to dry and the final application to cure fully before subjecting the floor to foot traffic or furniture placement. This patience pays off in the longevity and performance of your sealed concrete floor.
Professional Application vs. DIY
While DIY application is possible, professional application often yields superior results. Professionals have access to high-quality sealers and specialised equipment. They also possess the expertise to handle unexpected issues that may arise during the sealing process.
If you choose to hire a professional, we at Superfloor Australia offer expert sealing services for polished concrete floors in Brisbane. Our team ensures precision application and lasting results, tailored to your specific needs. For commercial kitchens, resealing may be needed every two to three years, or even yearly in high-traffic areas.
Final Thoughts
Sealing polished concrete floors transforms spaces, enhancing both aesthetics and functionality. This process creates a protective barrier against stains, moisture, and wear, maintaining the floor’s lustrous shine for years. The increased durability saves time and money on maintenance while contributing to a healthier indoor environment by reducing dust and allergens.
Proper preparation and application techniques ensure optimal results when sealing polished concrete floors. Regular cleaning with pH-neutral products and prompt spill cleanup help maintain the beauty of sealed floors. Periodic assessment of the floor’s condition allows for timely resealing when signs of wear or diminished shine appear.
We at Superfloor Australia specialise in high-quality polished concrete flooring solutions in Brisbane. Our team provides expert guidance and services for lasting results in residential, commercial, and industrial settings (including sealing). A well-sealed polished concrete floor is an investment in the longevity and beauty of your space.
