Michael Joy mixes food grade silicone in this demo.
Steps
We have arranged this demo to be detailed yet easy to follow. Our Motto: Work Clean, Work Smart. The starter kit contains 4.4lbs(2000g) of base, .5 lb(225g) of catalyst, a mixing container, silicone hand cleaner (far Right) and a safety ID tag.
Backing up a moment, we have arranged this Demo to emphasize clean, safe working habits. Please pay attention to your work environment. Silicone is not a food ingredient, it is a chemical formulation and should be handled with respect and focused attention. Protect the surfaces of your work tables by covering them with a laye rof plastic wrap followed by a layer of butcher's paper.
 Always wear gloves goggles and an apron when mixing silicone. Do not mix Silicone where food is prepared. Open the jar of base. Carefully strike (against the jar lip) the liquid silicone off of the safety seal. Avoid Dripping.(silicone is a viscous liquid that does not dry when left exposed to air. Drips wil not go away on their own, just remain sticky.)
Use the spatula to push the safety seal back into the lid. keep the Safety seal, it helps prevent leaks.
Set the spatula on the lid from the mixing container. (Setting a sticky spatula on the table will only leave a silicone trail behind you.)
On the return stroke angle the spatula back into the container. This will help stop the flow of silicone in a manageable way.
 When the scale reads about 40 grams shy of the total amount of the base needed, use the spatula to cut the pour.to do this succesfully, you need to tilt the container back as you cuut the silicone flow off. Strike Quickly.
Hold the plastic jar securely. (the jar is flexible so that you may pinch it into a narrow pouring stream.) Silicone is very thick and it is necesary to pour in a slow steady stream in order to control the pour. Silicone is messy if you try to pour too fast. Do not pour over the label. A messy label can obscure important information needed for mixing.
Wipe the rim and threads of the jar clean with a paper towel.
Recap the jar. Because the jar is flexible, it is important not to over tighten the lid, which will cause it to mis-align.
 Next add 10% of catalyst (by weight) to the silicone base. example: 100 grams of base + 10 gram sof catalyst. Do not squeeze the bottle too tightly. The catalyst id thick, give it a chance to flow out of the bottle. We include a samll amount of extra catalyst to compensate for possible mixing errors. Do not be alarmed if you have extra catalyst after all of the base has been used.
Using a spatula dedicated to silicone use only, mix the base and the catalyst together. (Silicone is very thick, use a thick handled spatula) Stir in a deliberate manner and do not mix quickly. You should be able to get an even mix within three to five minutes. If you mix to fast, you will whip extra air into the silicone. Air bubbles in the silicone = Air bubbles in your mold. not good.
This is a very important step and can mean the difference between a bubble free mold and a bubble filled mold. Hold the silicone about 24 inches above your mold box and pour it in a long, thin stream. (Remember, pour silicone from one corner of the mixing container.) Pouring in a thin stream stretches the air bubbles in the silicone so they burst before they hit the mold box. This is called needling.
Prepare to pour the mix by scraping all of the silicone towards one corner of the mixing container (the corner you struck the spatula against). Notice the air bubbles in the mix. This is to be expected.
 After you have mixed it to a uniform color and there is no marbling in the mix, strike the spatula against one corner of the mixing container
Remember to scrape the side of the mixing container with the spatula. Working with a clear mixing container will mak e it easy for you to se where unmixed siolicone is hiding. Unmixed(white) silicone is not likely to cure when poured over a model
After you have poured the silicone into the mold box, strike the spatula against the edge of a clink board(metal mold box).
Silicone will bond to the tips of most spatulas. Be sure to wipe off the lilquid silicone before it cures. The silicone will not adhere to the inside of a plastic mixing bucket. It is easier to let the silicone residue cure in the bucket (and later just peel it out) than trying to wipe the bucket clean with paper towels. Don't bother trying to clean the mixing bucket until after the silicone has cured.
 place the base and the catalyst into its original plastic bag and seal it for the next use. Do not store material where food is prepared and keep all mold making materials out of reach of children.
Picture hrere are the molds made from one starter kit(4.4lbs-2000g). it is important to recognize that we pour into fitted mold boxes made from our clink boards , which size the moeds very efficiently. Please keep in mind, you are likely to waste some material during your firstmold making efforts. Remember the material will go farther if you work clean and smart. Happy casting!
Text for mixing food grade silicone