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DIY Bath Bomb into CUSTOM Shapes

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My daughter just returned from Lush Bath with some cool bath bomb shapes and designs, which gave me the idea for a post on molding your own bath bombs with ImPRESSive Putty, a re-usable molding material that you can use to make as many different shapes as you want.

How about a train shaped bath bomb?

R2D2 bath bomb? If you have the shape, you can make it. However, more complex shapes are more of a challenge because you the bath bomb material is fragile. So block type molds are best.

FIRST, How to Make Your Bath Bomb Mold Shape using ImPRESSive Putty

The ImPRESSive Putty is a re-usable molding material that can be re-melted continously to make different shapes. I'm going to show you on a train shape, but you can use any shape that you want.Mold-wise, I wouldn't make the shapes too complicated as the bath bomb material may not be strong enough to keep it's shape. But go wild on the different fragrances, colors, and added textures.

First, soften the ImPRESSive Re-usalbe Molding Putty. For a 6 oz. size, it will take about 50 seconds in most microwaves, but microwaves will vary. Let it cool after you've heated it so you don't burn yourself.

Press over your object that you are molding and let it cool.

Now to make the bath bomb.


Dry Ingredients mixed together first:

  • 1 cup baking soda
  • 1/2 cup Epsom salts
  • 1/2 cup citric acid

Wet ingredients mixed separately before adding together:

  • 1 tsp. water
  • 2 tsp. essential oil
  • 3 tsp. oil (olive oil)
  • food coloring (any color you want)


Mix the dry ingredients together. And separately mix the wet ingredients. Then slowly mix the wet into the dry and mix until it's clumpy. Do not add too much of the wet ingredients or the bath bomb will begin to activate before its time. This is the hard part. If you add too much water, the bath bomb will begin to foam on its own, but too little water and it won't stick together. Start with a little and build up.

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Why ComposiMold for Mold Making? Because it works