This guide walks you through the proper surface preparation and application process for using Fix-A-Floor® Tile Grout to effectively regrout grout lines after Fix-A-Floor® Injection Repair Adhesive application and for general grout line repair.

Preliminary Surface Prep (Post Fix-A-Floor® Injection Repair Adhesive Application)

• Before beginning any grout repair, verify that the adhesive has fully cured, which typically takes 24 hours but may vary depending on temperature and humidity.
• Clean the area thoroughly: Remove any residual adhesive or dried material from the surface of the tile using a damp cloth or gentle cleaner. This ensures the grout bonds properly and creates a uniform appearance.

Grout Joint Preparation (For Existing Tile Installations)

• If you're repairing grout in an existing tile installation, remove approximately 1/16” of the old grout from between the tiles using a grout rake, oscillating tool, or small chisel. This creates space for the new grout to adhere securely.
• Disinfect the area with a mild bleach solution or grout-safe disinfectant to help eliminate mildew and bacteria that can grow in damp tile joints.

Application Instructions

1. Clean Surface
• Using a wet sponge or stiff brush, scrub the joints and surrounding tile to loosen and remove any dust, dirt, or soap scum.
• Dry the surface thoroughly with a clean cloth before applying new grout to prevent moisture from weakening adhesion.

2. Prepare the Tube
• Remove the cap from the grout tube.
• Cut the nozzle at a 45° angle to your desired bead size—ideally matching the width of the tile joint to ensure even filling.
3. Apply the Grout
• Squeeze the grout directly into the tile joints, applying firm and even pressure.
• Use a grout float or damp cloth to press the grout into the joints and smooth the surface.
• For optimal results, work in sections no larger than 4 square feet at a time to prevent the grout from drying before you can clean it.
4. Initial Set and Cleanup
• Gently wipe away excess grout from the tile surface using a damp sponge or cloth. Avoid pressing into the joints during this stage.
5. Buff the Surface
• After letting the grout dry for 1 hour, use a clean, dry cloth to buff the tile and remove any remaining grout haze.
6. Cure Time
• Let the grout cure undisturbed for 24 - 48 hours before exposing it to moisture, heavy foot traffic, or applying grout sealer.
• In high humidity or poorly ventilated areas, allow additional time for full curing to ensure the integrity of the repair. 

Pro Tip: For best results, maintain ambient and surface temperatures above 55°F (13°C) during and after application. Avoid applying in extremely humid or wet conditions.