Complete Guide to Choosing the Best Sealer for Polished Concrete Floors
Are your polished concrete floors looking a bit lackluster? Or are you simply wanting to keep them in pristine condition for longer? The secret to protecting your investment lies in choosing the right sealer.
Whether you’re looking to add a glossy shine or preserve your floor’s natural matte finish, a quality sealer can make all the difference.
But with so many options available, how do you choose the perfect sealer for your polished concrete floors? In this comprehensive guide, we’ll walk you through everything you need to know about selecting the best sealer to protect your floors from stains, wear, and moisture.
Let’s get started.
Why You Need a Sealer for Polished Concrete Floors?
Before exploring the different types of sealers, it’s important to understand why sealing is important. Sealers provide a protective layer on top of your concrete, helping to:
- Prevent stains and dirt buildup
- Make cleaning easier
- Protect against moisture and chemicals
- Enhance the natural color and shine of the polished surface
Without a proper sealer, your polished concrete floors are more vulnerable to wear and damage. A high-quality sealer can extend the lifespan of your floors, ensuring they maintain their professional look for years to come.
Types of Sealers | Which One is Best for Polished Concrete Floors?
There are two main types of sealers used for polished concrete.
- Topical Sealers
- Penetrating Sealers
Each has its unique advantages, depending on your needs. Let’s get into the detail:
1. Topical Sealers (Film-Forming Sealers)
Topical sealers sit on the surface of the concrete. It forms a protective film that shields concrete floor from moisture, stains, and other contaminants. These sealers are usually made of acrylic, polyurethane, or epoxy. And they’re great for giving your polished concrete floors that eye-catching high-gloss or satin finish.
- Acrylic Sealers: These are among the most common water-based sealers. They provide a glossy finish and offer good protection against stains and dirt. However, over time, acrylic sealers can yellow. Especially under UV exposure. They are easy to apply. But they may need to be reapplied more frequently.
- Polyurethane Sealers: Known for their durability, polyurethane sealers are available in both water-based and solvent-based They provide a strong, long-lasting finish. They are highly resistant to scratches and chemicals which makes them ideal for high-traffic areas.
- Epoxy Sealers: If you’re looking for an industrial-grade solution, epoxy sealers are a great option. They offer superior protection against wear and chemicals, making them perfect for commercial spaces or garages.
2. Penetrating Sealers (Non-Film-Forming Sealers)
Unlike topical sealers, penetrating sealers work by soaking into the concrete and forming a protective barrier within the pores. These sealers don’t change the floor’s appearance as much as topical sealers do. Thus, providing a more natural, matte finish. They are particularly beneficial for outdoor or highly porous concrete surfaces.
- Siliconate Sealers: These are excellent for protecting concrete from water and staining. Siliconate sealers penetrate deep into the concrete. They create a hydrophobic layer that prevents moisture from seeping in. This makes them ideal for outdoor concrete surfaces or areas prone to moisture.
- Densifiers: Concrete densifiers are mostly used in combination with other penetrating sealers. They react with the concrete’s natural minerals to form a hard, durable surface that resists dusting, staining, and wear.
5 Key Factors to Consider When Choosing Sealer for Concrete Floors
There are a few key things you need to keep in mind before choosing a concrete floor sealer:
1. Floor Location / Foot Traffic
Let’s start with the most important question: How much foot traffic does the area see? The amount of foot traffic your floor sees plays a huge role in the type of sealer you’ll need.
(i). For Busy, High-Traffic Areas
If your floor is in a busy area, like warehouses, retail stores, or schools, you’ll need a tough, long-lasting sealer that can handle the hustle. Penetrating sealers, especially siliconate sealers, are ideal. They soak deep into the concrete, offering solid protection against spills, dirt, cleaning products, and daily wear and tear. Thus, they’re perfect for:
- Warehouses & Retail Stores: These places mostly have predictable traffic surges and need a year-round solution. Siliconate sealers are built for the job. They stand up to moisture from wet shoes, routine mopping, and even the occasional spill.
- Offices: If the space is mainly used by staff and doesn’t get much public footfall, it’s easier to maintain. A low-maintenance sealer like acrylic or polyurethane works well here. These sealers offer good shine, are easy to clean, and require minimal upkeep.
- Restaurants: Floors in restaurants are cleaned daily and often come in contact with water and grease. A water-resistant and slip-resistant sealer is a must. Go for polyurethane or siliconate sealers. They’re not only durable but also give that sleek, high-gloss look while keeping the surface safe and easy to clean.
(ii). For Low-Traffic Areas
If your concrete floor isn’t used much, such as in storage rooms or private offices, you can get away with a less durable option. Topical sealers are more affordables and still provide decent protection. Just keep in mind that they may need to be reapplied sooner.
2. Environment
Is your floor exposed to moisture, chemicals, or outdoor conditions?
If yes, then the environment must influence your decision. For damp areas or places where chemical spills are likely, a waterproof or chemical-resistant sealer is essential. It’ll help maintain both the look and strength of your concrete over time.
3. Look & Finish
Polished concrete doesn’t just need to be strong. It should look good, too. Sealers can affect how your floor looks. So, decide whether you want a high-gloss, satin, or matte finish.
Want a glossy, mirror-like shine? Go with polyurethane or acrylic sealers. Prefer a natural, no-fuss matte finish? A penetrating sealer is your best bet.
4. Maintenance Needs
Let’s be honest. Not everyone wants to spend weekends resealing floors. Some sealers are higher maintenance than others.
- Topical sealers might need more frequent touch-ups. Especially in busy areas.
- Penetrating sealers, on the other hand, last longer and need less reapplication. This saves you time (and effort) in the long run.
So, think ahead: Are you okay with resealing every couple of years? Or do you want a more set-it-and-forget-it option?
5. Your Budget?
Your budget can make a big difference when buying a sealer.
If you’re on a tighter budget, acrylic sealers are a great cost-effective option. They’re less expensive but still provide decent protection. Especially for lower-traffic areas.
Got more to spend? Go for penetrating sealers. They can cost more upfront. But they last longer and offer better long-term protection. Especially in high-traffic zones.
Quick Tip: Even if you’re working with a smaller budget, try to avoid applying a cheap topical sealer in high-traffic areas more than once. If you know the space is going to be used heavily, investing in a quality sealer now. It will save you money on maintenance down the road.
Read more about > How Much Do Polished Concrete Floors Cost in Perth?
Tips for Sealing Polished Concrete Floors Like A Pro
Now, let’s walk through the simple steps and tips to help you seal your polished concrete floor, the right way.
Check the Weather First
Before you even open the sealer, make sure the conditions are right. The temperature should be above 50°F (10°C) and the humidity below 80%. Do you know why? Because temperature and moisture levels directly affect how the sealer dries and sticks to the floor.
Prep the Surface Like a Pro
A clean, dry floor is a must. Sweep, vacuum, and mop away any dust or debris. If there’s paint or any residue on the surface, grind it off so the sealer can bond properly. Any leftover grime can prevent the sealer from working effectively.
Safety First!
Sealers contain chemicals that can irritate your skin and eyes. So, don’t forget your safety gear. Gloves, long sleeves, and protective eyewear will keep you safe and comfortable during the job.
Avoid Direct Sunlight
Sealing your concrete floor in direct sunlight? Not the best idea.
Heat can cause the sealer to dry too fast. This leads to streaks or patchy spots. Additionally, UV rays can break down the sealer in those areas over time. To avoid this, try sealing in the early morning or late afternoon. Or block sunlight by covering windows and doors if you’re working indoors.
Know Your Sealer: One Coat or Two?
Different sealers have different rules. If you’re using a solvent-based or acrylic sealer, you’ll likely need two coats for full coverage. For a penetrating sealer, one coat is usually enough. Always check the label for instructions before you start.
Application: Brush, Roller, or Spray?
For most polished concrete floors, a roller is your best friend. It offers smooth, even coverage and helps prevent oversaturation. Spraying can work too. But it’s a bit trickier to control. Whatever method you use, be patient and take your time.
Don’t Overdo It
Too much sealer can actually cause problems. Applying it too thick can create puddles and an overly glossy finish that might peel or become sticky. Thin, even coats are the way to go.
Let It Cure
Once you’ve applied the sealer, let it cure fully before walking on it. Every product has a recommended curing time, so follow that closely. Walking on the floor too soon can ruin your hard work.
Explore more about > How to Clean Polished Concrete Floors?
When Is It Not a Good Idea to Seal Your Concrete Floors?
While sealing offers great protection and a polished look, there are times when it’s best to wait. Here are a few key situations when sealing your concrete floor isn’t recommended:
When You’re Unsure About the Floor’s Condition
Not sure whether sealing is the right move for your space? This is when to call in a pro. A concrete flooring expert can assess the condition of your floor and guide you on the best course of action. This will save you time, money, and hassle.
When the Concrete is New
Just poured your concrete floor? Hold off on sealing. Fresh concrete needs time to cure properly—usually about 28 days. Sealing it too early can trap moisture and lead to long-term issues like peeling or uneven finish.
When the Floor is Cracked or Damaged
If your floor has visible cracks, chips, or structural damage, sealing won’t solve the problem. In fact, it can lock in those issues, making repairs harder later on. Always fix any damage before applying a sealer.
Want to seal your concrete floors for long-lasting protection?
Contact Infinity Flooring Today to Protect Your Polished Concrete Floors
At Infinity Flooring, we specialise in delivering high-quality polished concrete flooring solutions.
With over 25 years of experience, our team of polished concrete specialists uses the latest equipment to grind, hone, polish, and seal your existing slab, transforming it into a sleek, durable surface that’s easy to maintain. Enjoy a scratch-resistant finish that reduces repair costs and enhances your property’s appeal. We guarantee exceptional results and a flawless finish.