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Mixing Instructions for Mosaics

NOTE: DiamondCRETE sets up very quickly. Do not attempt to mix all of the needed grout in a single batch. In order to have more control over the working time of the product it is advisable to mix grout in several batches, working a small section with each batch.
The amount of dry DiamondCRETE required will depend on several factors including the spacing left between the tesserae (the design elements of the mosaic) and the size of the project. Most small projects such as breakfast trays, platters, etc. require less than 2 cups of dry powder. If you are blending two or more colors, be sure and blend a sufficient quantity of dry powder before starting so that each smaller batch of mixed grout is consistent in color.
A. Mask off any portion of your project you do not wish to grout such as borders and absorbent tesserae.
B. Wearing gloves, mix a small quantity of DiamondCRETE (usually 1 cup or less) to a fairly thick paste and grout your project by pressing the paste into the spaces left between the tesserae of your mosaic. DiamondCRETE has water reducers in the mix which act as fortifiers and prevent the need for excess water when mixing. You will notice the DiamondCRETE mixture will thin as it is being worked so use caution when adding water - a spray bottle can be very handy for controlling the amount of water used. If the grout is too thin, add more dry powder to bring the grout back to a thick paste consistency before applying to the mosaic. Using less water strengthens the grout by reducing shrinkage, and minimizes the efflorescence (a white mineral deposit) that forms on the grout during the curing process.

C. As the grout begins to dry, a haze will develop over the project. Gently clean the project as needed throughout the grouting process. To clean your project, use dry paper towels or lint free rags and lightly buff the tesserae and shape the grout where necessary. Avoid using watered down sponges as the water will wash away much of the creamy cement in the grout mixture and leave a grainy finished surface.

D. Continue to grout and clean in small sections repeating steps B & C until the mosaic is complete.

E. After the DiamondCRETE has begun to set, but before it has hardened, remove any masking applied in step A so the grout can be shaped if needed. Allow the grout to dry naturally overnight or longer.

F. Seal your mosaic with DiamondSEAL. Sealing your mosaic protects it from staining, retards efflorescence, and prevents the grout from taking on additional moisture.

DiamondCRETE is well suited as a grout for both interior and exterior applications, however, it is not rated for underwater mosaics. For underwater mosaics, such as birdbath bowls or fountains, use a grout and sealer rated for such applications usually found in pool and tile supply stores.

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