Quick answer
Here are the key differences between epoxy grout, cement grout, and cement mortar:
- Composition:
- Epoxy grout: Made from epoxy resins and hardeners.
- Cement grout: A mix of cement, water, and sometimes sand.
- Cement mortar: Cement, sand, and water used to bond building materials.
- Usage:
- Epoxy grout: Ideal for tile joints in wet or chemical-prone areas.
- Cement grout: Used for filling tile gaps and anchoring.
- Cement mortar: Used for laying bricks, blocks, or stone.
- Strength & Durability:
- Epoxy is stronger, waterproof, and stain-resistant.
- Cement-based options are more affordable but less durable and more porous.
- Application:
- Epoxy is harder to apply but lasts longer.
- Cement products are easier to work with but require sealing in wet areas.
Choose based on durability needs, budget, and application type.
When it comes to construction, flooring, or tiling projects, the terms epoxy grout, cement grout, and cement mortar often come up. But what exactly are they? How do they differ from each other? And most importantly, which one should you use for your specific project?
In this guide, we’ll break down the key differences between epoxy grout, cement grout, and cement mortar. This will help you make an informed decision, whether you’re redoing your bathroom, installing a new kitchen backsplash, or working on a larger construction project.
What is Epoxy Grout and Why is it So Popular?
Epoxy grout is a type of grout made from a mixture of resin and hardener. This combination creates a durable and long-lasting material that’s ideal for areas that experience heavy traffic, moisture, or exposure to chemicals. You may have seen it in high-end installations or commercial settings due to its excellent performance.
Key Benefits of Epoxy Grout:
- Durability: Epoxy grout is extremely resistant to stains, moisture, and chemicals, making it a popular choice for kitchens, bathrooms, and industrial spaces.
- Non-porous: Unlike cement-based grouts, epoxy grout doesn’t absorb water or dirt, which means it won’t discolor over time.
- Easy to Clean: The non-porous surface makes it incredibly easy to wipe clean, which is why it’s commonly used in areas exposed to spills.
However, it does come with its drawbacks, such as:
- Difficult to work with: Mixing and applying epoxy grout can be tricky, especially for beginners. The resin and hardener need to be perfectly balanced, and the grout needs to be applied quickly before it hardens.
- Cost: Epoxy grout is more expensive than cement-based grouts, which could make it less desirable for some projects.
What Is Cement Grout and When Should You Use It?
Cement grout is the most common type of grout used in residential and commercial installations. It’s made from a mix of cement, sand, and water. Cement grout is easier to work with compared to epoxy grout and is often the go-to choice for DIY projects.
Key Benefits of Cement Grout:
- Affordable: Cement grout is more budget-friendly than epoxy grout, which makes it a popular choice for large-scale tiling projects.
- Versatility: Cement grout is available in a variety of colors, allowing for flexibility when matching grout to tiles.
- Easy to Apply: It’s much easier to mix and apply than epoxy grout, especially for beginners.
However, cement grout also has its downsides:
- Porous: Cement grout is more prone to absorbing moisture and stains. This can lead to discoloration over time, especially in high-moisture areas.
- Requires Sealing: To prevent staining and moisture absorption, cement grout needs to be sealed. Without proper sealing, it can become dirty and unsightly.
How Does Cement Mortar Differ from Grout?
Now, you may be wondering: what’s the difference between cement grout and cement mortar? While these two terms are often used interchangeably, they are quite different in their composition and uses.
What is Cement Mortar?
Cement mortar is a mixture of cement, sand, and water that is used to bind bricks, stones, or tiles together. It’s a thick, paste-like substance that is perfect for holding large, heavy materials in place. Cement mortar is primarily used for setting tiles, bricks, or stone.
Key Benefits of Cement Mortar:
- Strong Bonding: Cement mortar creates a strong bond between tiles and the surface, ensuring that tiles stay in place long-term.
- Versatility: It can be used for both interior and exterior projects, including patios, driveways, and walls.
However, cement mortar is not as flexible as epoxy grout and is not suitable for filling gaps between tiles or dealing with movement between them.
What Are the Key Differences Between Epoxy Grout, Cement Grout, and Cement Mortar?
The key differences between these materials come down to their purpose, composition, and performance characteristics. Here’s a quick comparison:
| Feature | Epoxy Grout | Cement Grout | Cement Mortar |
|---|---|---|---|
| Composition | Resin + Hardener | Cement + Sand + Water | Cement + Sand + Water |
| Primary Use | Filling spaces between tiles | Filling spaces between tiles | Bonding tiles or bricks |
| Durability | Extremely durable and resistant | Less durable, prone to staining | Highly durable for bonding |
| Water Resistance | Waterproof | Absorbs moisture | Water-resistant but not waterproof |
| Ease of Application | Difficult, requires precision | Easy to apply | Easy to apply |
| Cost | Expensive | Affordable | Affordable |
Which One Should You Use?
- Use Epoxy Grout: If you’re working on a project that requires durability, moisture resistance, and easy maintenance (like kitchens or bathrooms with heavy traffic).
- Use Cement Grout: If you need something budget-friendly for a standard residential tiling project. It’s perfect for areas where you can regularly seal it to prevent staining.
- Use Cement Mortar: If you’re installing large tiles, stones, or bricks that need a strong bond but don’t need to fill the spaces between them.
Think of epoxy grout as the superhero of grouts. It’s tough, stain-proof, and water-resistant. But just like a superhero, it’s not always needed for every job. So when should you actually go for epoxy grout?
Use Epoxy Grout When:
- You’re working in a wet zone – like a shower, swimming pool, or commercial kitchen. Epoxy won’t absorb water like cement grout can.
- You need something stain-proof – in areas with grease, food, or harsh chemicals (like restaurants or hospital labs), epoxy keeps its color and doesn’t soak up messes.
- You want long-term durability – epoxy grout can last decades with little to no maintenance.
- You don’t want to seal it – unlike cement grout, epoxy doesn’t need sealing. It’s basically maintenance-free once installed.
Skip Epoxy Grout If:
- You’re doing a quick, budget-friendly home reno.
- You don’t want to rush—epoxy sets fast and needs quick work.
- You’re new to tiling and want something easy to handle.
Do You Know? Epoxy grout is so strong, it’s often used in airplane hangars and industrial factories!
Bottom Line:
If you’re working in high-moisture, high-traffic, or high-stress environments, epoxy grout is 100% worth the higher price tag and tricky application. For smaller, dry, and indoor areas? Cement grout is easier and budget-friendlier.
What Are the Best Uses for Cement Mortar?
Let’s shift gears. Mortar isn’t grout. Mortar is like the glue that holds your tiles, bricks, and stones together. You’ve probably seen workers slapping it on during a patio build or while laying bricks for a wall.
So where does mortar really shine?
Top Uses for Cement Mortar:
- Bricklaying: It’s the classic go-to for building walls, chimneys, and fireplaces.
- Laying Stone or Concrete Blocks: Mortar offers a strong grip and fills gaps to keep everything snug.
- Tile Installation on Floors and Walls: Especially with large tiles or in uneven areas.
- Outdoor Work: Patios, walkways, stone benches—mortar is weather-resistant when done right.
Types of Cement Mortar Applications:
| Application | Why Mortar Works |
|---|---|
| Brick Walls | Creates a firm, long-lasting bond between bricks |
| Patio Pavers | Keeps stones aligned and resists movement |
| Fireplace Construction | Heat-tolerant and solid structure builder |
| Tile Backing on Cement Board | Offers better grip than adhesives |
Pro Tip: Always dampen your bricks or surface before applying mortar. It helps the mortar bond better and prevents cracking.
When to Avoid Mortar:
- If you need flexibility in the material (use tile adhesive instead).
- On surfaces that move or shift a lot (like wood subfloors).
- Indoors where appearance matters more than strength—it’s not the prettiest.
What Are the Key Advantages of Epoxy Grout Over Cement Grout?
It’s decision time! You’re standing in the hardware store staring at two bags: epoxy grout and cement grout. What makes epoxy so much better—and is it always worth the extra cash?
Let’s break down the core benefits of epoxy grout compared to its cement-based cousin:
1. Water Resistance
Epoxy doesn’t soak up water. Cement grout does. That means epoxy is way better for wet areas like:
- Bathrooms
- Pools
- Steam rooms
- Outdoor kitchens
2. Stain Resistance
Cooking oil, ketchup, soap, wine—you name it, epoxy resists it. Cement grout? Not so much. It’s porous, which means it absorbs stains unless you seal it regularly.
3. No Sealing Required
With cement grout, sealing is a must-do (and re-do every year). With epoxy, there’s no need to seal. That saves you time and money down the road.
4. Stronger and Longer Lasting
Epoxy grout has higher tensile strength, which means it won’t crack easily. Cement grout can shrink or crack over time due to movement or moisture.
5. Holds Up to Harsh Cleaners
Got pets? Messy kids? Own a commercial kitchen? Epoxy grout stands up to bleach and acidic cleaners, while cement grout wears down with strong chemicals.
Do You Know? Epoxy grout has a compressive strength of up to 15,000 PSI—cement grout? Around 2,000–4,000 PSI.
Cement Grout Still Has a Few Perks:
Forgiving for beginners and other environments that require hygiene and resilience.
Cheaper upfront
Easier to install
More color options in some cases
How Do You Apply Epoxy Grout, Cement Grout, and Cement Mortar Properly?
Let’s be honest—knowing the theory is one thing, but getting your hands dirty is a whole different ball game. Applying each of these materials correctly makes all the difference between a flawless finish and a frustrating do-over.
How to Apply Epoxy Grout
Applying epoxy grout takes patience, speed, and the right technique. Because of its fast setting time, you need to work in small sections.
Steps:
- Mix the resin and hardener according to the manufacturer’s instructions.
- Use a rubber float to push the grout into the joints.
- Wipe off excess grout immediately using a damp sponge.
- Rinse tools fast—once epoxy hardens, it’s super tough to remove!
Pro Tip: Always wear gloves! Epoxy can irritate the skin.
How to Apply Cement Grout
This is a friendlier material for DIYers. Just mix it with water, and you’re good to go.
Steps:
- Mix the grout until it reaches a peanut butter-like consistency.
- Use a rubber float at a 45-degree angle to press it into the joints.
- Let it set for about 15–30 minutes, then sponge off the haze.
- After 48–72 hours, apply a sealer if needed.
Do You Know? Some modern cement grouts come pre-mixed and sealed, saving time and effort.
How to Use Cement Mortar
Mortar is all about bonding, so getting the texture right is key.
Steps:
- Mix one part cement with three to four parts sand, then slowly add water until it’s thick but spreadable.
- Apply a thin layer to the surface with a notched trowel.
- Press your tile, brick, or stone firmly into place.
- Clean off any squeeze-out before it hardens.
What Are Common Mistakes to Avoid With These Materials?
Even seasoned pros mess up sometimes. Let’s help you avoid common pitfalls that can cost time, money, and sanity.
Epoxy Grout Mistakes
- Working too slow: This stuff sets FAST.
- Not mixing properly: If the ratio is off, you’ll end up with a sticky mess.
- Skipping protective gear: Your hands will thank you later.
Cement Grout Mistakes
- Using too much water: This weakens the mixture.
- Skipping sealing: This one’s a biggie—unsealed grout gets gross, fast.
- Cleaning too late: Cement haze is no joke and a pain to remove.
Cement Mortar Mistakes
- Wrong mix ratio: Too much water = weak bond. Too dry = hard to work with.
- Not letting it cure: Mortar needs time. Rushing the drying process can weaken the bond.
- Bad surface prep: Always clean and dampen surfaces before applying mortar.
Do You Know? – Fun Facts About Grouting and Mortaring
- Did you know that the first recorded use of grout was in the 1800s? Builders used a combination of lime, sand, and water to fill gaps between tiles.
- The word “mortar” comes from the Latin “mors,” which means “to grind.” It was named this way because it’s used to bond materials together, much like grinding ingredients in a mortar and pestle.
- Epoxy grout isn’t just for tiles! It’s often used in countertops, showers, and even in industrial settings due to its chemical resistance.
FAQs
- What’s the difference between grout and mortar?
- Grout is used to fill the gaps between tiles, while mortar is used to bond tiles or bricks to a surface.
- Is epoxy grout more expensive than cement grout?
- Yes, epoxy grout is typically more expensive due to its durability and chemical resistance.
- How long does epoxy grout last?
- When applied correctly, epoxy grout can last for many years without requiring maintenance.
- Can I use cement grout in a shower?
- Yes, but you will need to seal it to prevent water absorption and staining.
- Is cement mortar waterproof?
- Cement mortar is water-resistant but not entirely waterproof. It works well for outdoor installations where moisture exposure is low.
- Can I use epoxy grout for outdoor installations?
- Yes, epoxy grout is suitable for outdoor projects, especially those exposed to chemicals, dirt, and heavy traffic.
- How do I maintain cement grout?
- Cement grout should be sealed regularly to protect it from stains and moisture.
- Is epoxy grout easy to clean?
- Yes, one of the major benefits of epoxy grout is its ease of cleaning. It resists stains and can be wiped clean easily.
- Can I use mortar for tiling?
- Yes, cement mortar is perfect for bonding tiles to surfaces but is not used for filling gaps between them.
- Which grout is best for high-traffic areas?
- Epoxy grout is the best option for high-traffic areas due to its durability and resistance to moisture and stains.
Conclusion
In conclusion, understanding the differences between epoxy grout, cement grout, and cement mortar is essential for choosing the right material for your project. Epoxy grout is ideal for areas exposed to high moisture and traffic, while cement grout is perfect for budget-friendly residential projects. Cement mortar, on the other hand, excels at bonding heavy materials like bricks and stones.
Make sure to consider the specific needs of your project, such as water resistance, durability, and ease of application, before making a decision.
