SPRESIN Food Grade Silicone Mold Making Kit 32 Oz (16 Oz Part A + 16 Oz Part B) Liquid Silicone Rubber Mold Making 1A:1B Mix, DIY Molds for Resin Crafts, Food Safe Tin Cure Craft Rubber

This is a great product. It is some of the easiest to use and work with mold making material that I have worked with. The product is a simple 1:1 ratio for mixing, flows well, and has a good working time. After setting the de-molding process is painless. I placed a few knobs in a plastic box, a sprocket on a piece of acrylic with the top of a cut plastic party cup taped loosely over it. I wanted to see if it would flow under the rim of the cup. It didn't. I placed another sprocket on a silicone coaster mold with a mostly used roll of painters tape making a taller "wall". The last "test" was to make a mold of the inside of a couple guitar tone and volume knobs. I wanted to mold the inside of the knobs so I could use the castings as inserts in the knobs I am making. Mixing was easy, Measure twice, mix once. Once mixed the silicone is a good consistency. It is thin enough to flow and fill all the small details in the object you are making the mold of. It is thick enough to keep from running between the cup rim and acrylic. De-molding was easy! The set mold pulled away from the plastic box, the cardboard tape tube, the acrylic and cup, and of course all the pieces I was making the molds of. The silicone is stronger than I expected. The 1/4" (6mm) holes for the potentiometer posts filled, grabbed the detail in the holes, and did not rip or come apart when I pulled the silicone out of the just over 1/4" (6mm) deep holes. It also was able to fill in the cavity around the hole. Easy! The material picked up every little detail, from the texture on the sprocket surface, to the de-bossed numbers around the edge of guitar knobs. Great! The fail for this part of my project was totally my own fault. The instructions warn that the material will adhere to silicone molds if they are not coated with a mold release product, or a thin coating of petroleum jelly. This slipped my mind until after I poured the material into the silicone coaster mold... As you can see, it did fuse with the coaster mold and it ripped apart when I tried to salvage the mold. It was my own fault, it was in the instructions but slipped my mind. Overall this product is excellent for making molds. Keep in mind you need to use a mold release if you are making molds of silicone parts, or using a silicone mold to hold the object you are making the mold of. I didn't use any release product, the hard parts and the paper (cardboard tape tube) all released easily from the set material. Epoxy resin castings popped right out of the molds as well. Great stuff.

It was my first time using this type of product. Following the direction with the 1:1 ratio, it was fairly simple, but it does cure pretty fast, so make sure you know that. Start with a small batch so that you know how it works.

I didn’t get all the parts. I received only B side and haven’t seen A side. So it’s basically useless

The picture show that it’s a 1:1 ratio mixture of A and B, and I only have A and the pigment that I also ordered. I can’t even use it now!

This is easy to measure, you can't beat 1:1 for a ration. It makes a quality mold and works very quickly but is much easier if you have some proper equipment. I have an electric resin mixer or I would have a very different opinion of how easy this is to mix. Having a silicon mat and dedicated tools made clean up much easier. It peeled off the mat pretty easily. I kept it small for testing purposes and it set really quickly. It almost set too quickly, I had to scramble to get my object placed properly in time. I made a simple mold of the kid's initials for a novelty chocolate treat, very basic. It came out perfect. I haven't gotten the chocolate yet (way too hot in AZ right now to buy good chocolate) so I didn't mold it but it looks fine, I don't anticipate any issues. While the ratio is easy it really does set quickly so I'd be leery of recommending it to a beginner. I'm no expert but I have worked with resin enough to not be too hesitant. We all work more slowly when we are doing something we're not sure of and that can be an issue here. Make sure you're ready before you actually mix it. Get everything laid out and have your plan in place. I was trying to do some rearranging and almost really messed it up. I do love the idea of quick setting but I wasn't prepared for it. In the future it will be an asset.

It works really good and shows every intricate detail. The two parts mixed well together and were easy to work with. The finished molds are firm, durable and flexible. It is advertised as food safe, but I just use it for polymer clay and epoxy molds.

The product was packed very well. SRC says this kit is good for beginners, but the info sheet has many disclaimers, and advises the use of a vacuum chamber to deal with air bubbles. Of course every beginner owns a vacuum chamber! Regardless, I mixed the two parts carefully and had little or no bubble trouble. I made a small mold of a pewter paperweight I had lying around, and used a plastic box as a mold box. This stuff is very gooey and will be messy if you don't work carefully. After 6 to 7 hours, I de-molded the piece with moderate difficulty, as I didn't have any mold-release substance. The details of the paperweight were captured perfectly, and the cured mold material seems unlikely to tear. Cleanup is easy with isopropyl alcohol- I used a 91% solution. I don't currently have any casting resin, but I have every reason to believe that the final casting will look great. And I have more than enough silicone left to take on a more substantial product in the future. This silicone is said to be suitable for food projects such as chocolate. As such, it's a versatile and useful product for Arts and Crafts use. All I need now is to find some casting resin that doesn't cost a fortune. 03/15/2024: I have added a photo showing a finished piece made with Eco-Resin powder. The mold captured the original's detail perfectly.