1. Introduction
The LATICRETE SPECTRALOCK 1 Pre-Mixed Grout is a professional-grade, ready-to-use grout designed for superior strength and performance in various tiling applications. This product offers the benefits of an epoxy grout without the need for mixing, providing exceptional durability, versatility, and consistent color. It is stain-proof for residential installations and exceeds ANSI A118.19 standards, meeting or exceeding ANSI A118.3 specific test designation 5.6.
2. Safety Information
Always read and understand all safety data sheets (SDS) and product labels before use. Wear appropriate personal protective equipment (PPE), including gloves and eye protection, during handling and application. Ensure adequate ventilation in the work area. Keep out of reach of children and pets. In case of contact with skin or eyes, rinse immediately with plenty of water and seek medical advice if irritation persists. Do not ingest.
3. Product Overview
SPECTRALOCK 1 is a revolutionary pre-mixed grout that combines ease of use with the robust performance typically associated with epoxy grouts. Its formulation ensures long-lasting color and resistance to stains.
Key Features:
- Pre-Mixed Formula: No mixing required, saving time and reducing potential for errors.
- Superior Strength: 10X higher PSI rating than standard pre-mixed grouts, resistant to cracking.
- Stain-Proof: For residential installations, resistant to common household cleaners and liquids.
- Color Consistency: Uniform color throughout the application.
- No Sealing Required: Eliminates the need for post-application sealing.
- Versatile: Suitable for various demanding applications.

Image 1: LATICRETE SPECTRALOCK 1 Pre-Mixed Grout in a bucket. This image displays the product packaging, highlighting its key features such as "Pre-Mixed Grout with Epoxy Performance," "Strongest pre-mixed grout," "No mixing required," and "No sealing required."
4. Setup and Preparation
4.1 Surface Preparation:
- Ensure all tile adhesive is fully cured according to the manufacturer's instructions.
- Grout joints must be clean, dry, and free of any debris, dust, or contaminants.
- Remove any spacers or shims from the tile joints.
- Verify that the tile surface is clean and free of any residues that could interfere with grout adhesion or appearance.
4.2 Product Preparation:
- Open the bucket and stir the grout thoroughly with a clean margin trowel or low-speed drill mixer until a uniform consistency is achieved.
- Do not add water or any other liquids to the grout.
- Only use the amount of grout needed for immediate application. Reseal the bucket tightly after use to preserve the remaining material.
5. Application Instructions
5.1 Grout Application:
- Using a hard rubber float, spread the grout diagonally across the tile surface, ensuring joints are completely filled.
- Hold the float at a 45-degree angle to the tile and apply firm pressure to pack the grout into the joints.
- Remove excess grout from the tile surface by holding the float at a 90-degree angle and moving it diagonally across the tiles.

Image 2: A person applying grout to tile joints using a rubber float. The image shows the process of spreading the grout evenly across the tile surface and into the gaps.
5.2 Initial Cleaning (within 10-20 minutes):
- Begin initial cleaning as soon as the grout has firmed up slightly in the joints (typically 10-20 minutes, depending on temperature and humidity).
- Use a damp (not wet) sponge to gently wipe the tile surface in a circular motion to loosen any grout haze.
- Rinse the sponge frequently in clean water and wring it out thoroughly. Change water often to avoid spreading haze.
- Avoid removing grout from the joints during this process.
5.3 Final Cleaning (within 24 hours):
- After 24 hours, a slight haze may remain. This can be removed with a clean, damp cloth or a non-abrasive grout haze remover if necessary.
- Ensure the area is well-ventilated during final cleaning.
6. Maintenance
SPECTRALOCK 1 Pre-Mixed Grout is designed for low maintenance. Due to its stain-proof properties (for residential installations), regular cleaning with neutral pH cleaners is typically sufficient.
- Clean all spills immediately to prevent potential staining, especially with highly acidic or alkaline substances.
- Avoid harsh abrasive cleaners, scouring pads, or strong chemical solvents, as these can damage the grout surface over time.
- No sealing is required for this product.

Image 3: A clean, well-maintained tiled bathroom floor, demonstrating the aesthetic result of properly applied and cared-for grout.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Grout haze remains after cleaning. | Insufficient initial cleaning; grout allowed to dry too long before cleaning. | Perform a final cleaning with a damp cloth or a non-abrasive grout haze remover. Ensure proper ventilation. |
| Grout appears uneven or has pinholes. | Improper application technique; insufficient pressure during floating; grout not stirred thoroughly. | Ensure grout is thoroughly stirred before use. Apply with firm, consistent pressure, packing the joints completely. For existing issues, small areas may be carefully repaired or re-grouted. |
| Grout is difficult to spread. | Grout not stirred adequately; cold temperatures. | Stir grout thoroughly. Ensure ambient and surface temperatures are within recommended ranges (typically 50°F to 90°F / 10°C to 32°C). |
8. Specifications
- Model Number: 3191-0001-2
- Color: #91 Slate Grey
- Material: Epoxy (Pre-Mixed)
- Item Form: Liquid
- Water Resistance Level: Waterproof
- Manufacturer: Laticrete
- Standards Met: Exceeds ANSI A118.19, Meets or exceeds ANSI A118.3 specific test designation 5.6
- Package Dimensions: 10.55 x 8.9 x 8.66 inches
- Package Weight: Approximately 14.68 Pounds
9. Warranty Information
LATICRETE SPECTRALOCK 1 Pre-Mixed Grout comes with a Lifetime Warranty. For specific terms and conditions of the warranty, please refer to the official LATICRETE website or contact LATICRETE customer support. The warranty covers manufacturing defects and product performance when installed according to manufacturer guidelines.
10. Customer Support
For technical assistance, product inquiries, or warranty claims, please contact LATICRETE customer support:
- Website: www.laticrete.com
- Refer to the product packaging for specific contact numbers or email addresses.





