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Grouting your mosaics, in my opinion, is the most exciting part of any mosaic project! Once you’ve filled all your joints with your grout mixture and cleaned it thoroughly, you breath life into your mosaic as your design becomes prominent and clearly visible ready for all to enjoy. You’ll need to purchase the materials necessary to create your grout mixture, prepare your mixture, apply it to your mosaic surface and clean it thoroughly. Let’s get started!

Step 1: Gather Your Materials

For this post, I’ve decided to show you how to grout a DIY lit glass project, but the exact same process applies to grouting all your tile mosaics and non lit glass mosaic projects. In order to grout this lovely stained glass mosaic table lamp you’ll need your dry grout, latex additive, mixing bowl, spoon, sponge, garden gloves, old towels, water and of course, your project. I’m using black grout for this project as I’m wanting each side to resemble a leaded and soldered stained glass window. Black grout dries to a very dark gray which is the same color as soldered lead. You need to add liquid latex instead of water to your dry grout to that the grout mixture adheres to your glass base. If you don’t use latex additive the grout will not adhere as well to your glass base and you may have cracking and even pieces of grout loosening from the joints. Prior to grouting any mosaic, make sure you remove as much of the excess water resistant glue that may have seeped out from underneath a piece and filled a joint that needs to be filled with grout. With lit stained glass mosaics, removing the excess glue is critical as it will distort your design when the piece is lit.

Step 2: Prepare Your Piece to Be Grouted

This step is not necessary for many mosaic projects, but for this mosaic lamp project it is. You want to tape the top edge of your lamp with masking tape or painters tape as you want to keep that edge all clean and free of grout. Plus, you don’t want excess grout falling inside your lamp base as this base is an open design.

Step 3: Mix, Apply and Clean Off Your Excess Grout

You’re ready now for the actual grouting process. First, place some dry grout into your mixing bowl and add enough latex additive to achieve the consistency of oily peanut butter. Don’t worry if you accidentally add to much latex, simply add more dry grout to the mixture until you achieve the proper consistency.

Once your grout mixture is ready, cover the first side of your lamp with grout. Make certain you cover the entire surface and get the mixture into every crevice. Don’t be afraid to use too much grout and you’ll be cleaning the excess off little by little. After you’ve covered the side completely, take a moistened sponge and begin wiping off the excess grout. Make certain you’re near  water source as you will need to rinse your sponge repeatedly. After you’ve cleaned the majority of the grout off, clean it thoroughly with a old towel or rag. Repeat this process for the other three sides of your lamp. Make sure you are grouting and cleaning one side at a time to prevent any excess grout from drying on the surface of your pieces. If you’re grout dries up a bit, simply add more latex additive to it to regain the proper consistency of your initial mixture. Make sure to create an nice transition edge along each side of your lamp by applying grout to the edge and smoothing it with your finger.

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Take a look at the finished product after cleaning thoroughly!