The GeoPress™ bulk refill demo pictures show how to mix food grade silicone and make your own molds.
Steps
Work Clean, Work smart. We have arranged this demo to emphasize safe clean working habits. Please mpay attention to your work environment. Silicone is not a food ingrewdient, it is a chemical formulation adn should be handled with respect and focused attention. With the geo press bulk refill, you will get 10 lbs of base, 1 lb of catalyst and a pouring spout.
Use a pair of pliers to remove the shipping seal from the container. If you use mild twisting pressure, The seal can be saved for re-use. (Allow the Silicone to warm to room temperature before using.)
Next, use a screwdriver to pry the lid open. You might think it very simple to open a can and pour our its contents, however if you do not pour cleanly, drips from the can will trail you at every step.(Silicone is a viscous material and does not dry when left exposed to air, Driops will not go away on their own they will remain sticky)
Attache the flexible pouring spout onto the inner ridge of the container (bend it into place). Make sure it clips tightly into place.
Silicone is very thick and it is necesary to to pour in a slow steady stream in order to prevent the base from flowing over the side edges of the pouring spout. If silicone runs over the side edges of the spout, it is likely you will lose control of the pour. Silicone is messy if you try and pour it too fast.
Place a clear mixing container ontthe scale and zero it out. With a spatula in one hand, slowly pour the base int othe mixing container.
 Protect your digital scal eby placing it inside of a clear plastic bag. Always wear gloves gogglesand an apron when mixing silicone. Do not mix silicone where food is prepared.
The pouring spout will fit securely along the inner lip of the can, be sure to slide th epouring spout to the side opposite of the label.(pouring over the labelwill lead to drips onto the very insctructions you may need to refer to later.)
When the scale reads about 75 grams shy of the total amount of base needed, use the spatula to cut the pour. To do this succesfully you need to tilt the container back as you cut the silicone flow. Strike Quickly.
On the return stroke, angle the spatula back into the coontainer. This will help stop the flow of silicone in a manageable way. Do not strike the spatula against the rim of the can. Only Strike against the yellow pouring spout.
 Set the can on the table and strike the inside edge of the pouring spout. Strike the spatula off on the lowest point of the pouring spout(where it clips to the rim). Set the spatula on the metal lid when you are finished.
Use a paper towel to wipe residue off of the pouring spout.
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
Using a spatula dedicated to silicone use only, mix the base and the ctalysttogether. (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.
 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 ctalyst id thick, give it a chance to flow out of the bottle. (Be careful where you set the spatula. Seeting a sticky spatula on the table will only leave a silicone trail behind you.)
If you are going to make more molds right away or later in the day, put a large ZipLock bag over the can to allow quick access for the next pour.(Seal the can tightly with the metal lid if you are going to leave the mold making area unattended.) Do not store materials where food is prepared and keep all mold making materials out of reach of children.
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
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.
 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. Please Note: the spatula with catalyzed silicone should be set on a surface other than your table, as it may create a mess.
After you have poured the silicone into the mold box, strike the spatula against the edge of a clilnk board.
 
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.
Buy in our online store
The GeoPress bulk refill contains 10lbs of food grade silicone base and 1lb cataylst and a pouring spout. Ideal to make your own molds, like chocolate and candy molds, pastry molds, competition molds,and showpiece molds.