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)

I went from idea to finished product in about 5 hours using this silicone! I was VERY skeptical that this would work without any inhibition, but there were absolutely no uncured spots in my molds at all when they were done (I used Siraya Tech "Fast" Navy Grey resin for the original). I poured about 1/4th of an inch of silicone for these small molds, and they were cured within AN HOUR. Literally the only negative I have is that I struggled to get all the bubbles out of these detailed molds - specifically talking about the spots where bubbles formed on my resin original due to surface tension, not the floating bubbles in the silicone - and the silicone was too thick to get them out by tapping the mold box or poking them with a toothpick. That's true of a lot of silicones I've tried though, and the pros waaaay outweigh the cons here. Best of all, the molds come out clear enough that you can use UV resin in them. Very excited about what I'll be able to do with this material!

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.

As a small company prototyping a variety of products that require platinum cure silicone, this silicone formula GREATLY simplifies our processes and ensures high degrees of success when casting silicone against resin molds. For many, printing in resin is the go-to method for making cost effective high quality molds for casting soft rubbers, either by using the printed resin object as a master to make a silicone mold, or by pouring directly into a printed resin mold. We have tested this silicone against Siraya tech Fast, Blu, and Build resins and have found that they cure properly and consistently against fully cured resin. This is something we have been needing for years! While we have not rigorously tested the mechanical properties we have found that for most purposes it is on par with other similar platinum cure silicones in terms of overall strength and tear resistance. Truly great stuff! Can't wait to see what's next for the future of this company as I just love their products for their quality, consistency, variety, and innovation.

Make absolutely sure to look at the instructions, you have to cure your prints a little differently! Otherwise, this silicone worked very well, and cures very fast (3 hours for me but the cure time isn’t listed literally anywhere on any of their websites which was frustrating). I used a pressure pot, so I can’t say make about degassing, but the texture came out really nice. I’ll add a picture once the top part of the mold finishes curing.

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.

Best platinum silicone I've ever used (which compares to a LOT of brand). 1) THIN. When they say self-degassing, they mean it. This is the lowest vicosity silicone I've seen, probably lower viscosity than the resin. I still vacuumed (keep in mind its a lower work time) and this stuff had already fully degassed before chamber even reached 1psi~ and only expanded 50%. Nearly as fast as watching boil. 2) No cure inhibition just as advertised. Treated the parts as specified (which is normal process) and had no inhibition, even in the tiny recesses/overhangs that usually as the nightmares (less UV post curing perhaps) 3) The low viscosity also helped pouring a very cleanly. The downsides i could find, were the shore level and the lack of bulk options. Shore 25 is a bit stiff for my needs. Maybe after this is a overwhelming success, alternate shores or a thinning agent will be made available. Gallon units or larger please. 2x5kg jugs would be sufficient.

We used SirayaTech Fast Smokey Black to print our masters. After a lot of research, we decided to try the SirayaTech Defiant 25 silicone to make our first master molds rather than fuss with other methods to prevent cure inhibition. IT WORKS. No inhibition. And as a total bonus, I messed up and poured some of the Defiant 25 in a previously made dice mold (BBDINO 20A Silicone) and the die came out CLEAN and I have now made squishy dice without weird mold release! Highly recommend this silicone for making molds for 3d printed masters.

3Dプリンタで成形したものを、大量生産と考え、シリコンモールドを初めて作りました。扱いやすく、とても簡単に作れました。リピートしてます。

Ottima funziona molto bene

I ordered this silicone to try casting a mold in a 3D printed mold. The mold was printed in UV resin and that resin reacts (even if cured ) with the silicone and prevents it to become hard. It stays gooey and sticky. However, any batches that I made in other mold types worked perfectly. Once cured that silicone is super tough and hard to break. Very good product. Will need to investigate methods to prevent resin mold contamination of the silicone. The vendor website provides tips.

Cures very fast, ready to use mold in 4h. Copy details very well and is very durable, also works incredible well will liquid printed resin pieces, I never have a silicone that work as good as this with that kind on pieces, no uncured areas close to the printed resin, is fantastic! The only thing I don't like very much is the shore it has, 25A make the molds a bit difficult to demold for some kind of pieces cos the silicone is a bit too rigid, but that the only point of it I don't like very much cos make my fingers hurt when I demold ceratin pieces, but it's absolutelly worthy 10/10, very recomended

alles bestens vielen dank !