Sealing surfaces properly is essential for durability, stain resistance, and longevity, especially in the demanding environments encountered by construction professionals. Whether working with natural stone, tile, or concrete, understanding the correct sealer application techniques is crucial for achieving lasting protection.
This guide will walk you through the essentials of sealer application, from understanding the difference between water-based and solvent-based products to choosing the right sealer finish for your project. We’ll cover best practices for applying FILA’s high-performance sealers, including MP90 ECO PLUS and FOB, as well as tips for tackling common issues like residue removal and cure times. By the end, you’ll be equipped with the knowledge to achieve optimal results on every job.
Water-Based vs. Solvent-Based Sealers
Water-based sealers like MP90 ECO PLUS offer excellent protection, faster curing times, and no odor, making them an eco-friendly choice with easier residue removal. They can typically be applied on the same day as cleaning, provided the surface is dry.
Solvent-based sealers like FOB penetrate deeper into the material and require a completely dry surface before application. They are suitable for both indoor and outdoor use and are particularly recommended for high-traffic exterior areas with highly porous surfaces.
Moreover, they have an odor, a characteristic of solvents, and require application in a ventilated area. They also have higher VOC content, but they offer long-lasting protection. Residue removal must be handled carefully to prevent buildup.
Important Application Rule
If and when necessary, you can apply a solvent-based sealer over a water-based one or over another solvent-based sealer (natural look penetrating sealers). However, you cannot use a water-based sealer over a solvent-based one.
Sealer Types and Finishes
When selecting a sealer, consider not just the protection it offers but also the finish it provides. Different sealers can change the look of your stone, enhancing or preserving its natural appearance. Here’s a guide to FILA’s main sealer finishes:
Natural Look Sealers
These maintain the original appearance of the stone without altering its color:
- MP90 (solvent-based, penetrating): For polished porcelain, all-natural stone, quartz, and grout.
- FOB (solvent-based, penetrating): For all natural stone, grout, concrete, quarry tile, and terracotta.
- MP90 ECO PLUS (water-based, penetrating): For polished porcelain, porous and non-porous natural stone, quartz, grout, terracotta, and concrete.
Enhanced Look Sealers
These darken and enrich the color of the stone:
- STONEPLUS (solvent-based, penetrating): For all-natural stone.
- STONEPLUS ECO (water-based, penetrating): For all-natural stone.
Wet Look Sealers
These enrich the color of the stone and give it a slight sheen:
- WET ECO (water-based, topical): For unpolished natural stone, unpolished agglomerates, and terracotta.
By understanding the different types of finishes, you can choose the sealer that best suits both the aesthetic and functional needs of your project. Now that you’ve explored our different sealing products let’s dive into the best practices for applying MP90 ECO PLUS and FOB.
Preparing Your Surface for Success
Before applying a sealer, proper surface preparation is crucial. Here’s what you need to do:
- Clean the Surface: Ensure the surface is free from dirt, dust, and stains. Any contaminants left behind can interfere with the sealer’s performance.
- Ensure the Surface is Dry: Moisture can prevent proper penetration. For solvent-based sealers like FOB, the surface must be completely dry.
- Check Temperature and Conditions: Always follow the manufacturer’s guidelines regarding temperature and humidity to allow for proper curing.
Essential Supplies for Sealer Application
Choosing the right tools can significantly impact the outcome. Recommended tools include:
- Lambswool applicators: Ideal for even distribution and pushing the sealer into the surface.
- Microfiber cloths: Perfect for residue removal and ensuring a streak-free finish.
- Paintbrushes: Suitable for smaller areas and detailed applications.
- A long-handled applicator: To ensure even penetration.
- Paint tray: Helps control the amount of sealer applied.
Tools to Avoid
While choosing the right tools is crucial, it’s equally important to steer clear of those that can compromise the sealer’s performance:
- Sponges: These can cause uneven coverage and absorption, leading to inconsistent results.
- Rollers: Rollers often create bubbles and an uneven finish, so it’s best to avoid them for a flawless application.
By sticking with the recommended tools and avoiding these, you’ll ensure a smoother, more professional finish every time.
Applying MP90 ECO PLUS: Best Practices
MP90 ECO PLUS is a high-performance, water-based penetrating sealer designed to protect surfaces without altering their appearance. Follow these steps for the best results:
- Apply on a clean, dry surface.
- Use a lambswool applicator to spread a single coat.
- Allow the sealer to sit for 5-10 minutes.
- Remove excess sealer by wiping it with a microfiber cloth.
- For highly absorbent materials, apply a second coat immediately. A third coat is unnecessary.
- Walk on the surface after 4 hours; complete cure occurs in 24 hours.
Extra Tips for Optimal Application:
Apply enough sealer to thoroughly saturate the surface, allowing it to dwell for proper absorption. At FILA’s Italian HQ, experts also recommend pushing the sealer into the surface with a long-handled applicator to ensure even penetration for the best results.
Water-based sealers, such as MP90 ECO PLUS, typically allow for application within half a day of cleaning, depending on the temperature and humidity. In ideal conditions (around 22°C and standard humidity). For most situations, the entire process can be completed within a single day. Keep in mind that extreme temperature or humidity may affect drying times, so adjust your timing as needed to ensure optimal results.
Applying FILA FOB: Solvent-Based Sealing Done Right
FOB is a solvent-based penetrating sealer that provides deep protection for natural stone and porous materials. For proper application:
- Ensure the surface is completely dry and clean before application.
- As before, apply evenly using a lambswool applicator.
- Let it dwell for about 10 minutes, as specified on the product label.
- Remove all excess residues with a microfiber cloth.
- Wait 8 hours before applying a second coat, if needed.
Topical Sealers: Avoiding Common Pitfalls
Topical sealers create a protective film on the surface, offering enhanced resistance but requiring a careful application technique. Here’s what to keep in mind:
- Apply the sealer evenly on a clean and dry surface, covering the entire material.
- Let it dry completely—do not remove residue.
- Apply a second coat of the product 2-3 hours after the first coat following the same method.
- Use a fleece applicator for best results.
Failure to use the correct applicator can leave visible streaks and marks on the surface.
Sealing with HYDROREP and Other Specialty Products
For water-repellent treatments like HYDROREP:
- On a clean and dry surface, use a paintbrush or an airless sprayer for efficient and even coverage.
- Follow with FOB for added protection, but never apply them in reverse order.
For PW10, another specialty treatment, an airless sprayer is also recommended. Always refer to the product’s technical data sheet (TDS) for application details.
Common Issues & Solutions: Tackling Residue and Cure Times
One of the most common issues in sealer application is residue removal, particularly with products like STONEPLUS. If not appropriately removed:
- The surface will feel sticky rather than achieving the desired matte finish.
- Excess residue will not create a shine—it will cause adhesion problems.
Residue Removal Tips
- Wipe off excess sealer within 10 minutes using a microfiber cloth.
- Remove with a cloth soaked in the same product if residue is left for a few hours.
- If residue is left for days, use a specific remover like PROSTRIP
Remember: STONEPLUS leaves a matte finish, not a wet look. Leaving residue on the surface will not enhance shine but will make the surface sticky. Ensure the surface is completely dry, and promptly wipe off any excess sealer to avoid issues.
Understanding Dry Time vs. Cure Time
- Dry time is when the surface is safe to walk on (typically 4-8 hours).
- Cure time is when the sealer fully hardens and reaches maximum protection (24-72 hours).
While the surface may feel dry within hours, it usually achieves around 90% protection after 24 hours and full protection after 72 hours. Cure times will vary depending on the type of sealer used, so always consult the product’s specifications for precise guidelines.
Unlock Professional-Grade Protection Today
Mastering sealer application requires the proper preparation, tools, and techniques. Following these best practices, construction professionals can ensure long-lasting protection for natural stone, tile, and porous surfaces. Whether using MP90 ECO PLUS for a water-based solution or FOB for deeper penetration, the key is even application, proper drying times, and thorough residue removal.
With the right application methods, your sealed surfaces will stay protected and perform at their best for years to come. For technical guidance or product recommendations, please get in touch with our team for further support.
