Concrete Coasters

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Introduction: Concrete Coasters

These coasters are easy to make and can be completed in an afternoon. They use a plastic cookie cutter as the mold for the cement where the cutter can be used multiple times to make a set of coasters. They would make a beautiful gift!

Supplies

1. Rapid Set Cement All: This makes a smooth white cement that is not sandy. A 25-lb box is ~$10-15; you will not need much for this project (~1 cup/coaster).

2. Disposable cup, gloves, water, and stir stick for mixing the cement. I used a plastic drink cup, Popsicle stick, and thin disposable gloves.

3. Plastic cookie cutter: For this Instructable I used a round one 3.5-inches in diameter. These sell at Walmart or Michaels for about a dollar.

4. A leaf for imprinting: I used a fresh hydrangea leaf from my garden.

5. Wax paper to protect the surface you are pouring concrete on.

6. Coarse sandpaper (I use 60 grit)

7. Paint and acrylic sealer for decorating the coaster.

8. Optional: Felt for the back of the coaster.

Step 1: Get Ready to Pour Concrete

The Cement All sets quickly (~30 seconds) so be prepared. For the coasters I made, I wanted them to be only ~1/4-inch (or ~1 cm) thick so I marked the pour line on the cookie cutter. Find a flat even surface and cover with wax paper to protect it. Get your leaf and put it between the wax paper and cookie cutter. Have the veins faced upward to make them imprinted into the concrete.

Step 2: Mix and Pour the Concrete

Put ~1/4 cup of water in the disposable cup. Don your gloves and add ~1 cup of Cement All, and stir it up. You want a consistency of a thick milkshake or runny peanut butter. Add more water or Cement All to get the consistency you want. Pour the wet cement into the cookie cutter, filling it up to the desired thickness.

You can make more than one coaster at a time using mulitiple cookie cutters, but I would recommend only two at a time because the Cement All sets so quickly.

The cement will cure in about an hour. If your pour was a little runny, it may take a little longer.

Step 3: Remove the Cement From the Cookie Cutter and Sand

The cement will turn white when it is dry. Pop it out of the cookie cutter and peel off the leaf. Sand the back and edges to make them even using a coarse grit sandpaper. I actually use the sidewalk to sand the back...

Step 4: Paint the Coaster(s)

I paint these with a solid color, fully covering the front, sides and back. In this example I am using black so the veins from the leaf will stand out against a lighter color I apply later. I painted these using a low cost acrylic (~99 cents), but spray paint would be faster and easier.

Once dry, a lighter color is dabbed on the surface but not in the veins. This can be done easily by dipping a paper towel or napkin in a little paint and removing any excess. Touch the paper towel to the surface of the coaster, adding a little color. I started by using two shades of green, with a darker ring around a lighter interior. I wanted more contrast so added a darker green to the outside. I then did a light touch of gold. Very little paint is needed - a little dab'l do ya.

Step 5: Protect the Coaster(s)

Add a coat of acrylic sealer to the front and back of the coaster when the paint is dry. Felt can be glued to the back if desired.

Step 6: Enjoy!

There are many different cookie cutter shapes and paint colors that all make beautiful coasters. Each one will be unqiue. My favorite is the standard round shape with dark veins, but make this Instructable your own!

Stone, Concrete, Cement Challenge

Runner Up in the
Stone, Concrete, Cement Challenge

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    9 Comments

    0
    WUVIE
    WUVIE

    1 year ago on Step 6

    These are so very cool! Congratulations on your runner-up prize. Neat idea, especially for people who don't have a pottery kiln. Kudos!

    0
    tcs79
    tcs79

    Question 1 year ago

    Very good idea. But in my knowledge, the cement tend to be fragile in such thin objects. Is this resistant or easily breakable? Just a question man.

    0
    MadeByBarb
    MadeByBarb

    Answer 1 year ago

    I have worked with Rapidset Cementall for years and it amazes me all the time! It is not anything liek regular concrete. I've even made the coasters as thin as 3/16" and they are perfect. Just be aware that some leaves have some deep centre veins. I liken this concrete mix to ceramics. ❤️

    Faux-Fossil-Forest-Coasters--madebybarb-13.jpg
    0
    mobeyplum
    mobeyplum

    Answer 1 year ago

    These are thick enough not to be fragile. I dropped one on stone and chipped it, but didn't break it. If you make it thinner, say ~1/8" (~0.5 cm) it will be easier to crack. Good question.

    0
    AnandM54
    AnandM54

    1 year ago

    Cool project!! Wow

    0
    NirL
    NirL

    1 year ago

    I like the idea of using leaves! (and your funny cat!)

    0
    Penolopy Bulnick
    Penolopy Bulnick

    1 year ago

    These are all beautiful! I love the way you painted them all :)