Epoxy grout is incredibly durable and stain-resistant, but it comes with notable drawbacks. Its primary disadvantages include a much higher price tag, a challenging and unforgiving installation process that sets rapidly, potential yellowing over time, and a slightly plastic-like appearance that may clash with natural stone.
Epoxy grout provides unmatched durability, stain resistance, and longevity, making it ideal for high-moisture and heavy-use areas. However, it requires careful application and comes at a higher cost. If you're looking for the best grout solutions for your project, explore the LATICRETE® tile grout selection today!
When you first learn how to tile, cement grout is often presented as the standard option for sealing your work. However, more tilers are now opting for epoxy grout for both indoor and outdoor projects.
Epoxy grout is highly durable and can last 20 to 30 years—often the lifetime of the tile itself. Because it is waterproof, stain-proof, and non-porous, it will not shrink, crack, or harbor mold like traditional cement-based grouts.
Yes, epoxy grout is absolutely worth it if you prioritize long-term durability and low maintenance, especially in wet or high-traffic areas. While it costs about 2 to 5 times more than traditional cement grout and requires professional installation, it is completely waterproof, stain-proof, and never needs sealing.
You can apply epoxy grout over old grout, but you cannot simply apply it directly on top. Because epoxy requires a clean, strong bond, you must first grind or scrape out at least 18one-eighth18 inch (or roughly 3 mm to 5 mm) of the old grout to leave enough space for the new material.
Here at Garage Force, our patented polyurea garage floor coatings are about 20 times stronger than epoxy coatings. That is a huge difference in strength!
Epoxy grout generally takes 24 to 72 hours to cure before you can safely use your shower. While it is highly water-resistant and sets quickly, exact times depend on the product brand, ambient temperature, and humidity.
Epoxy generally does not stick to materials that are flexible, non-porous, or have low surface energy. Because epoxy relies on soaking into microscopic pores or creating a strong chemical bond, smooth or waxy surfaces cause it to simply peel off once cured.
5 Common Mistakes in Epoxy Applications (And How to Avoid Them)
Builders often skip sealing grout to cut costs, save time, and avoid returning to the job site. Additionally, many modern polymer-modified grouts are stain-resistant, and sealing un-cured grout can trap moisture. Some installers even use it as an upsell or exclude it because sealing can leave a hazy film on certain tiles.
The "Professional" Epoxy Install (3-5 Years)
Even with perfect installation, the limitations of the epoxy chemistry itself will cause it to fail. We see these floors start to degrade around year 4 or 5. They may not peel as quickly as a DIY job, but they will chip, stain, and—most noticeably—turn yellow.
Epoxy grout is the strongest, most durable type of grout available. It is entirely non-porous, does not shrink, and is highly resistant to harsh chemicals, stains, and cracking. This makes it the industry standard for high-traffic areas, commercial kitchens, and wet spaces.
Epoxy grouting disadvantages would be time consuming to apply layer of coating and each cure time is 8 to 12 hours before the next layer is to be apply on. Protect from humidity, condensation and contact with water during the 24 hours first curing period.
Acetic acid can, over time, lightly soften or damage the surface of your epoxy finish, making it seem murkier or "cloudy". We recommend against using pure vinegar as a cleaning solution for epoxy resin surfaces.
Yes, you can apply epoxy over existing epoxy, provided the original surface is fully cured, structurally sound, and properly prepped. If the old epoxy is peeling, damaged, or poorly adhered, the new coat will fail.
Epoxy can be weakened by strong solvents. Substances such as pure acetone, potent alcohol (typically denatured), and lacquer thinners are all examples of this. These substances will gradually dissolve an epoxy resin surface, weakening it and reverting it to a liquid.
Epoxy coatings are non-porous and fully seal the concrete surface. Once applied, the floor becomes a solid, seamless layer that prevents water vapor from entering the space. With no gaps, seams, or grout lines, there's nowhere for mold to grow.
Yes, Dawn dish soap is excellent for cleaning grout because its gentle, grease-cutting formula will not strip sealers or discolor tile. For everyday maintenance, simply mix a dime-sized squirt of Blue Dawn in a 32-oz spray bottle of warm water. For tougher grime, you can upgrade to a deeper-cleaning DIY mixture.
As a general rule of thumb, your epoxy resin should feel well-cured after 24 hours. However, a complete cure and maximum hardness can take anywhere between 7-10 days, depending on the resin type. The most common reason for a tacky, under-cured project is inaccurately measuring your resin.
For heavy-duty, long-lasting concrete surfaces like garage floors and patios, Polyaspartic and Polyurea coatings are considered superior to epoxy. They are up to 20× stronger, fully UV-stable (won't yellow in the sun), and flexible enough to move with concrete without cracking.
The "best" epoxy depends entirely on your project. Top brands include J-B Weld for heavy-duty metal repairs, ArtResin for arts and crafts, and Rust-Oleum or ArmorGarage for durable DIY garage floors.