LET'S RESIN Silicone Putty, 1LB/40A Mold Making Kit, Non-Toxic, Strong & Flexible, Easy 1:1 Mixing Ratio for Reusable Silicone Molds, Resin, Soap

This dries slow as expected being zero shrink silicone. It dries in about 8 hours. I have other putty that dries in 30 minutes, but the end product gets pretty hard and not really flexible. Let's Resin may be slower but it gives far better results. Flexible, strong, and most importantly, it doesn't get sticky after sitting for a month or two after molding. I have found it easy to use and clean up. I think this product is a beter value than most for the money as I tend to need les to get the same results.

It's great stuff! If used wisely you can make quite a few molds for small items. One pound is plenty enough for jewelrymakers and most hobbyists. It's easy to mix, easy to shape, and easy to mash onto items to mold them. It's a very forgiving material that allows mold-making to be a casual hobby. It doesn't stick to skin very much, and it's easy to scrape and clean up even with bare hands. After mixing the putty, you get about 3 minutes of normal working time and then maybe 5-8 minutes to fix mistakes. You can also use a nonstick material like burnished wood to flatten areas and fix edges when necessary. Today is my first day using it and I've made 5 molds throughout the day. I found that an exacto or scalpel knife blade is outstanding for trimming the excess material from these molds. Use your thumb to push/roll the excess away from the mold cavity, then slice it off. This thin, folded rubber won't resist your blade at all so you can make amazingly precise cuts. In my photo I showed how many grams it took to make each mold. (I found that a good rule of thumb is to make the backing have 2-3x as much mass as the initial layer. Use pinches to blend the layers into one solid mass.) Since taking the photo, I've filled every mold with more of the silvery epoxy. Can't wait to see the results! The first two molds, I poured epoxy into them within 20 minutes of demolding the original items. Through time, I will research this material more and try to answer the following: 1. How much heat can it take? 2. How does it work with mold release spray? Overall, it's super fun and well worth trying! UPDATE: A few days later, I have an answer for the 2nd question. Mold release spray hardly seems to make any difference. But I also have some advice. You should wash and dry these molds before using them for the first time. If you don't, the oils from the silicone putty might get into your epoxy. This is especially noticeable for small or thin items. The epoxy items cast in these molds were flexible like a gummy. After a few days they did fully harden, but it was a bit nerve-wracking to wiggle them out of the mold without bending or breaking them. I imagine this leftover silicone oil is also why people have problems with UV Resin. So, wash the molds!

It worked just as described and was very easy to use. The putty dried pretty quick and was very easy to remove. The mold held together nicely. The container size gives you plenty to work with and you should get multiple uses out of it unless you are making a large mold.

This putty is great, I needed more than the other brands had and this was the perfect amount! Works really well!

It does cure fast, but so do a number of other putty silicones. I've seen only one brand that offers a slow set putty and I get tons of air bubbles. Make sure to mix both parts completely and as fast as possible. I use small double sided measuring scoops that measure 1/8th to 1/2 of a teaspoon at a time. I use putty silicones for fragile plant material or layering for stronger molds. This serves the purpose decently. It isn't as flexible as amazing mold putty, but it is sturdy enough to do the job. A bit of an observation when casting plants, it does come to trial and error. Some leaves have natural latex that may inhibit curing. Others may gas off as they dry, causing air bubbles or a foaming effect. This may or may not be avoidable. The trick is to keep trying until something works. I use polymer clay and haven't yet used the new molds I made with this product, but I expect good results. I dropped a star because of durability. This does show stress if you bend the mold too far. It is also because I am picky. It can also be fussy to get right. One advantage this product has is it does hold it's shape well if you try to sculpt the silicone to make custom texture stamps, where amazing mold putty would flatten out and lose detail. I also wish bulk quantities could be purchased of this stuff. This is one of the drawbacks I see is having to keep purchasing this at 1 lbs quantities when I desire 3lbs or more.

EDIT: !! I AM CHANGING MY ORIGINAL REVIEW!! After doing research on different types of silicone base and catalyst, I found a study of the effects of nitrile, vinyl, and latex gloves. To summarize, this putty does not interact well with nitrile gloves. I used it bare handed and found that it would set up as expected and is genuinely a good product especially for the cost. I apologize for my original review and I guarantee I will be using this product again in the future. I recommend just using your bare hands to mix this putty due to there also being no residue left on your hands after mixing. Again, I am sorry and I hope this is helpful! Packaging says that the working time is 3mins and the curing time is 15-20mins. However, this putty almost never sets up or cures, even with prolonged vigorous mixing. When it does finally harden in the slightest, the putty easily falls apart. Please stay away from this product and look elsewhere.

This has been trying to harden over an hour. As you can see in the photo it’s still EXTREMELY soft. Almost like play dough… as I read in a previous one star review. Maybe it was my fault I didn’t read the one star reviews and only read the top reviews. I was very excited to try this but please do more research into buying things. The quick drying time is what sold me but it was clearly wrong. I will wait over night but if it still doesn’t set I will be returning this. I will update this if this goes well or doesn’t set at all. As of right now DONT BUY THIS PRODUCT. I did everything correctly. 1:1 ratio. Very disappointed. It also left a very strange oily residue that took dawn dish soap to get off my hands. Update. It took about 16 hours to fully harden. As for right now I won’t be returning this product but if I have any more complications with it I will. I hope it works for what I need it to or this product is bogus

Not really that useful and not that easy to work with. I'm probably not using it as intended. Seems like a toy as it only works with things you can push into a blob of this stuff. In other words, good for trinkets and such. If you are just trying to capture the pattern of something small, than this works. Pretty expensive for it's limited application. Next time I will do the silicone caulk and corn starch DIY recipe. That stuff is also more pliable and just as durable.