When installing tile in a shower, choosing the best grout for shower conditions is one of the most important decisions you’ll make. Showers are high-moisture, high-use environments, and the wrong grout can absorb water, stain, crack, or even grow mold over time. That’s why professional installers often recommend specific grout types that perform best in wet areas and stand up to long-term exposure.

In this guide, we’ll walk through the types of grout used in showers, what makes each type a good choice, and the Tile ProSource products that deliver professional-grade results.

Why Grout Choice Matters in Showers

Grout fills the spaces between tile and plays a critical role in sealing the tile installation against water intrusion. In a shower, grout is exposed to constant moisture, frequent cleaning, and occasional temperature swings, all of which can accelerate wear on inferior products.

Here’s what to look for in shower grout:

• Water resistance and stain resistance: Water should be unable to penetrate joints and cause damage or discoloration.

• Durability: It should resist cracking and shedding over time.

• Mold and mildew resistance: A must for wet environments.

Epoxy grout is widely considered one of the best options for showers because it combines strong water resistance with excellent stain protection.

Top Grout Options for Showers

Here are some great grout solutions you can find on Tile ProSource, each suited to different needs in shower installations:

1. ARDEX WA High Performance 100% Solids Epoxy Grout & Adhesive

For the ultimate protection against moisture, staining, and wear, an epoxy grout like ARDEX WA High Performance 100% Solids Epoxy Grout & Adhesive is hard to beat. Epoxy grouts are waterproof resin-based grouts that also resist harsh cleaners and chemicals, making them ideal for shower walls and floors that see daily water exposure.

Benefits:

• Outstanding water and stain resistance

• Durable, long-lasting performance

• Excellent adhesion and color consistency

This 100% solids system is designed for tough projects where you need maximum protection and longevity.

2. ARDEX FL Rapid Set Flexible Sanded Grout

If your shower has wider grout joints (from 1/16″ up to 1/2″), ARDEX FL Rapid Set Flexible Sanded Grout offers a high-performance cementitious option. This polymer-modified grout resists cracking, is quick to set, and is suitable for wet areas, including showers.

Benefits:

• Rapid setting and walkable in hours

• Stain and water repellent

• Great for porcelain, ceramic, glass, and natural stone tile

While sanded grout doesn’t resist moisture as well as epoxy, it’s an excellent choice where joint size and material demand a traditional grout with superior strength.

3. ARDEX FG-C Unsanded Grout

For shower walls or installations with narrow joints or delicate tile surfaces, such as glass or polished stone, ARDEX FG-C Unsanded Grout is a top pick. This unsanded grout mixes to a creamy consistency, provides smooth joint lines, and is naturally mold and mildew-resistant, no sealer required.

Benefits:

• Ideal for grout joints up to 1/4″ (6 mm)

• Ultra-smooth finish with excellent color consistency

• Resistant to stains and water

Unsanded grout helps prevent scratching on sensitive tile, ideal for shower walls or intricate mosaic patterns.

4. ARDEX DG 1 One-Component Grout

If you want a pre-mixed solution that’s easy to work with and still delivers reliable performance, ARDEX DG 1 One-Component Grout is a great option. This grout requires no mixing with water or additives, cleans up easily, and forms a durable, stain-resistant joint.

Benefits:

• Ready to use out of the bucket

• No sealing needed

• Consistent color and strong performance

DG 1 simplifies grouting and is especially useful when you have a tight timeline but still want a professional result.

Tips for Installing Grout in a Shower

Regardless of the grout type you choose, here are some best practices for shower applications:

Proper Preparation

Make sure the tile surface is clean, level, and free of excess thinset or debris before grouting.

Use the Right Tools

A quality grout float helps work grout into joints smoothly, and a grout sponge keeps cleanup efficient.

Consider Sealing (When Applicable)

Conclusion: What’s the Best Grout for Showers?

For wet environments like showers, epoxy grout is often the best choice because of its superior water and stain resistance, durability, and low maintenance requirements. 

However, sanded and unsanded grout options from Tile ProSource can also perform well when selected based on joint width, tile type, and installation needs.

Our recommended products for shower grout include:

• ARDEX WA High Performance 100% Solids Epoxy Grout & Adhesive

• ARDEX FL Rapid Set Flexible Sanded Grout

• ARDEX FG-C Unsanded Grout

• ARDEX DG 1 One-Component Grout

Each offers a reliable solution depending on your project requirements. Choose the grout that fits your tile style, joint size, and performance needs, and you’ll enjoy a shower that looks great and lasts for years.