SPRESIN Cast-A-Mold Platinum, Food Grade, Platinum-Cured Silicone Rubber Mold Making Kit, DIY Set DIY Resin Crafts, Casting Epoxy and Polyurethane Resin - 32 Oz (16 Oz Part A + 16 Oz Part B)

I used this for mold-making and it works quite well. Platinum cure silicones (like this) make really excellent, flexible, durable molds. Way better quality than tin cure silicones. But! you should be aware of a few issues with platinum cure silicones in general. The first is the viscosity tends to be quite low. This means you don't have to degas the resin, which is great as bubbles will float to the top, and it also means you get incredible detail on the mold. But it also means that if you have any small pinholes or fissures in the mold it will leak out, so you have to be quite careful about sealing it up. The second is that a variety of materials can poison the platinum catalyst. The big one is epoxies; resin prints (epoxy based) for example will poison the catalyst and the resin will never cure. But there are a bunch of things that will poison the catalyst. Check very carefully before you use this product because if you try to mold something that poisons the catalyst, the resin will never cure and you will have a gloppy mess that will likely ruin your mold. As long as you look out for these two gotchas this product works absolutely great. If you can't use platinum cure for one of the above reasons, tin-cure silicones are an alternative, but personally I only recommend tin-cure if there's a reason you can't use platinum cure. It used to be that tin-cure was cheaper but that doesn't seem to be the case anymore so platinum cure is just better all-around.

Great product as expected. Durometer was nearly perfect. I did end up with some bubbles in my end product, but this was my first pour with silicone. I think the pot time is a little conservative I did run a timer to be sure I met it, but I think you could run over a little (74 F @ 70% humidity cast in alginate). Will be buying again!

Very pricey but the best I’ve ever used. I am a fan of the seller/manufacturer for many years Being both a mold and candle maker their products offer me great quality and flexibility. Mold quality offers no fluctuations but is consistent in its outcomes. Resin and mold making is not a cheap hobby so there are no do overs.

Used this material to make a mold. The mold was a glass plate on the bottom and carved wood sides. The material was mixed and poured into the mold. It cured overnight at room temperature. The cured silicone removal was easy and clean with no air bubbles. Worked like a charm.

Hello everyone! Just wanted to let you, “this is some great stuff!” Just make sure you use two equal ratio and “mix well.”Safe to use color powder Mica or ink resin paint. Paint came off since I did not “mix well” the first time, and did not cure well on the top part of the mould. I know next time, I’ll have a better experience. Just be patient and mix well. Thank you