Calculate Any Silicone Mold

It took some time to figure out but I finally came up with a formula that will allow you to figure out how much mixture you will need for any silicone mold. 

Before we dive into the formula, there are a couple of important things to note:

• Variations in Silicone Molds: Every silicone mold, even if it’s the same model, can have slight differences. Keep this in mind as it might affect the accuracy of your calculation.
• Leftover Mix: The formula I’m about to share will leave you with a small amount of leftover mix after pouring. This is intentional for a couple of reasons. Firstly, some of your mixture may stick to your mixing utensils and bowls. Secondly, having a little extra mix ensures you won’t run short in case of spills or mishaps during the pouring process.
• Silicone Mold: I am going to use the big silicone mold I found on Amazon that is pictured below. I have never used it before so I have no clue how much mixture I need to mix together to fill it to the top. 

 

Calculate Any Silicone Mold Using Cement All

Formula

(WF x 2) x 86% = CA

CA x 25% = W

First things first, we need to determine the water fill number (WF). Here’s how you do it:

• Place your silicone mold on a scale.
• Fill the mold with plain tap water to a comfortable level, not overflowing.
• You can use whichever metric system you feel comfortable with but I am going to use grams. This is your WF or Water Fill number.

So for this silicone mold my number is 710 grams. That means that my WF is 710. Now take that number at multiple that by 2. 

(WF x 2) x 86% = CA 

710 x 2 = 1420  

Now, let’s find the Cement All (CA) number:

1420 x 86% = 1217.2

To make that simpler let’s round that down to 1217. 

So, that means for the silicone mold we are using, we’ll need 1217 grams of Cement All.

Next, let’s determine the water amount (W) for our mixture:

1217 x 25% = 304.25

To make that simpler let’s round that down to 304. 

So, that means for the silicone mold we are using, we’ll need 304 grams of water. 

The Result:

• CA (Cement All): 1217g
• W (Water): 304g

Now you have all the necessary information to calculate how much mixture you need to fill your silicone mold using Cement All.

Calculate Any Silicone Mold Using Hydrostone

What if you choose Hydrostone over Cement All? No problem, even though Hydrostone has more water, the formula is quite similar.

Formula

(WF x 2) x 81% = Hy

Hy x 33% = W

For this part, we’ll use the WF we calculated earlier, which was 710 grams. Doubling it gives us 1420 grams. Now, apply the Hydrostone formula:

1420 x 81% = 1150 grams (rounded down)

So, for this silicone mold, you’ll need 1150 grams of Hydrostone. 

To determine the water content, we simply calculate:

1150 x 33% = 380 grams (rounded up)

The Result:

• Hy (Hydrostone): 1150g
• W (Water): 380g

Calculate Any Silicone Mold Using Other Mixes

But what if you’re not using Cement All or hydrostone? 

You can use the Cement All formula as a starting point. It’s as simple as:

• Determine your water fill number (WF) as we did earlier.
• Double WF & multiply by 86% to find your CA number.
• Adjust the 86% based on the amount of leftover mix.

Keep in mind that different mixtures have unique dry and wet content ratios. The 86% figure is a great starting point, but you may need to increase or decrease it based on your specific mixture.

Conclusion

Calculating the perfect mix for your silicone mold is simpler than you might imagine. It’s a crucial step in crafting concrete or Hydrostone candle jars, particularly if don’t like unnecessary waste. Mastering this formula ensures your projects are not only successful but also more economically sustainable. 

Happy crafting!

Happy molding, and enjoy your crafting journey! For more tips and tricks on concrete, Hydrostone, and candle making, check out my videos. Until next time, thanks for reading, and ciao!

If you would like to see the full video to EASY Way to Calculate Any Silicone Mold, click here.