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The SITS Girls

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DIY Mosaic Tile Coasters

· Aimee Reatherford

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With the warmer temperatures rising, festive drinks are always a must, and if there is one thing you’ll need to protect your surfaces, it is fun DIY mosaic tile coasters! These coasters are the perfect way to brighten up your space; they work both indoors and outdoors, and the best part is you can have your kiddos make their very own coaster (with parental help, of course).

While this isn’t a craft project you can complete in a few hours, it will be worth it once completed!

Picture of a pink mug with I heart NY sitting on mosaic tile coasters under the words DIY Tile Coasters.

DIY Mosaic Tile Coasters

Materials Needed for DIY Mosaic Tile Coasters

Supplies to make mosaic coasters - mosaic tiles, wooden coasters, grout, glue, mod podge, and paint brush.

How To Make Mosaic Tile Coasters

Begin by giving your wooden coasters a quick paint job. You can use any colors that will match your tiles, but I ended up using white. 

Wooden coaster painted white, sitting on a paper towel with a paint brush on top.

After the paint has dried, you can set your tiles on the coaster 7 by 7. Starting at the top and side, I found that you can space them out equally on the rest of the coaster. You can get creative with the tiles and create a pattern or you can randomly place colors. 

Wooden coaster with mosaic tiles glued on two sides.

After placing the tiles how you like them, you can start by gluing them down. I like using the E6000 Glue because it doesn’t set quickly; this will allow you to move the tiles around if you need to. Once you’ve glued all of your tiles to the wooden coaster, let cure for at least 24 hours. 

Small tiles on top of a square piece of wood with a container of glue beside it and more, loose tiles on the table.

If grouting is not something you are comfortable with, you can just glue your tiles closer together. I recommend leaving a little space between the tiles if you use unsanded grout.

After 24 hours, the glue should be good and dry; you can begin grouting. I mixed a few tablespoons of unsanded grout powder with water until it formed a batter-like consistency.

Plastic cup with grout mixture sitting next to coaster on paper towel.

I scooped a few tablespoons on top and covered the grout around to cover the tiles. Using my finger was much easier than using a scraper. I had more control over the amount of grout between the tiles. 

Dollop of grout on coaster.

You’ll want to remove as much grout as possible from your coaster. I recommend waiting at least 10-15 minutes for the grout in between the tiles to dry before wiping them down with a damp sponge to remove any excess grout on the tiles.

Coaster covered in grout.

It was harder to remove the grout from the tiles when it was still wet. Just make sure that the grout doesn’t dry entirely on your tiles. It will leave a streaky mess and won’t look as pretty! 

Coaster with tiles streaked with grout that needs to be wiped off.

While the coasters are drying, you can cut your cork roll down to size, this step is not required, but it gives them extra support. I also recommend letting the grout dry for another 24 hours before gluing down your cork on the back. 

Mosaic tile coaster.
Unfinished tile coasters stacked beside a jar of mod podge.

After your coasters are all dried, you can take some mod podge, give them a single coat of glue, and let them dry. Then voila!

Stack of DIY mosaic tile coasters.

You now have your very own colorful coasters perfect for your home and entertaining. 

DIY coasters with I heart NY mug on top.

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DIY Tile Coasters

Want more DIY fun? Check out these Watercolor Ink Coasters and DIY Sharpie Mugs!

Take your plain, boring mugs, and turn them into something fabulous with some Sharpies and a little creativity. DIY Sharpie mugs are easy to make, and will last for a long time if you follow all the steps.

About Aimee Reatherford

Aimee Reatherford graduated from Columbia College Chicago with a Bachelors degree in Photography. She has a sweet spot for vintage cars and rocking the latest sneakers. You can find her strolling the aisle of her local craft store for her next DIY project and working on her fitness in her spare time.