Siraya Tech Defiant 25 Platinum Silicone Mold Making DIY Kit, Food Safe, 25A Hardness, Ideal for 3D Printer UV Resin, Easy to Stop Curing Inhibition, No Coating, for Casting Epoxy Resin (35.3 Oz)

This stuff is fun to use. I made some chocolate molds with it, and I'm really pleased with the resulting chocolates. It molded around PLA (3-D printed models) very well. It kept so much detail that I was able to print the models on a holographic surface, which transferred to the mold, which transferred all the way to the chocolate and made excellent party favors. I used a vacuum pot and vacuumed the mixture 3x before pouring to get all the bubbles out. The working time is supposed to be 15 minutes, but it felt like it was starting to get gloopy around 13 minutes. I was working in a fairly warm environment at the time.

Works brilliantly. Takes mica pigment well and the self degassing is effective. Used for a few different projects now and it is quite durable when demolding/removing from form and is a good mix between stiffness and flexibility in general. Sets quickly while still allowing a good working time and gentle tapping/vibration should help any bubbles fully escape. Seems to handle small amounts of UV resin just fine although if you are casting a resin print I would recommend a topcoat just to be safe. Mixes well and cleans up just fine I should note too.

Let me start out by saying I rely on silicones and casting products to make a living. I have tried several 15-30 durometer silicones and had always had strange problems with them. Having said that, this silicone did not have any of the issues that other *more costly* silicones had that were comparable. The fact that I have also had zero cure inhibition issues when used in conjunction with elegoo ABS like 2.0 (that is my go to resin for my 3D printer) is just like the cherry on top of an already great silicone. It degasses extremely fast which speeds up production, while having ample work time when making smaller molds. I have used both the 15 and 25 duro varieties and have been equally impressed with both. One last thing worth noting is that when I had used other comparable platinum silicones that are a 1to1 ratio I seem to get a considerable amount of shrinkage. This has not been the case with the siraya tech silicone, even when using the molds repeatedly in a heated pressure pots I have not had any noticeable shrinking in any of my molds. Lastly, in my opinion it is very affordable, to be honest at its price point I didn’t expect to be this impressed by it. It is very seldom that I use a product that checks all the boxes, I wouldn’t change a thing except maybe making the product available in larger kit sizes and expanding the durometer range to include maybe a 45. It has quickly become my go to silicone for smaller molds that require some flexibility. These are my views and opinions and your mileage may vary.

Okay so my second time trying to write this review is for some reason Amazon itself crashed on my mobile device. The material when compared directly against an off-the-shelf silicone fared better. The off-the-shelf silicone being cheaper and more plentiful had a far harder time being removed from the test object. Now unfortunately given the cost of this material I've not done much testing with it as much as I would like to. Because to do a lot of good testing I need a rather large substantial source of it. And in casting you're going to use a good quantity. Unfortunately what you get in the containers is enough for maybe 2 good casts. So quantity versus cost is not in line with what I would like. That's not necessarily A fault of the product itself it's just that I would like to see the company offer a larger container of this stuff. Without you know a crazy hiking cost. Now the primary thing that I didn't like about this material and it goes as an unresolved issue. Was of the two times that I have used it in testing the very first time it took several days for it to cure and I'm not really quite sure why. I don't believe the substance requires a UV light here. The second time I did expose it to UV just in case. But I do not know that that had anything to do with it. I'm assuming it has something to do with external ambient temperature and exposure to atmosphere. But the second time that I used it I had better results and it did you overnight. I hope to get more casting in in the future and to be able to return better results and even perhaps a warning if possible to those who want to use it regarding specifics of what is necessary to get a Best use cure time.

Used an SLA resin printer and wanted to make a silicon mold of it. 3 other 'top' amazon platinum silicon brands all gave me the same result - a gooey mess that wouldn't cure against the printed part. I was super skeptical that the Defiant product would be able to solve a problem that many others had and still use platinum curing. Well, they did it. Silicon cured with absolutely no cure inhibition. Bravo, guys.

Very simple, strong and cures in around 3 hours.

I bought this so I could cast some 3D printed Dice Masters. A friend of mine managed to print me some using a resin 3D printer, and I was so excited to finally get my own logo on my dice. I knew I'd have to buy some sort of inhibitor product in order to cast them and when I saw videos about this product I was really eager to try it. Unfortunately it was a waste of money. It had absolutely zero inhibition effect when I tried to cast some test dice. I mixed the silicone properly and let the casting sit for half a day, but the silicone was still sticky and gooey around the dice. I tried it again on another dice thinking it was just a fluke, and nope... still a sticky gooey mess. An absolute waste of my time and money. Very upset because it cost me just as much as a bottle of Inhibit X would have cost.

Works great! Came quick