Silicone Putty, 1LB/40A Mold Making Kit

The perfect solution for mold making!!! I needed a small amount of silicone to make tiny molds and this product worked up very quickly and did the trick. You will not be disappointed. :o)

I almost gave this a 1 star and a bad review, BUT turns out I was the PROBLEM!!!! The first time I mixed it, I mixed more than what was needed. This made it hard to get out what I was trying to copy. It also created some very unwanted air bubbles and not to mention WASTE!!!! I retried it and used a much thinner covering. This did away with the air bubbles and made removing the casting a lot easier!!! I say if you want to try it, maybe mix a small amount and see how it works!!!!

I needed to make a resin copy of some trim on something that was far too large to submerge in a traditional silicone mold making kit, and this product worked to make my mold and was easy to use. I did have a few bubbles where the putty did not entirely conform with the contours of what I was molding, but these defects were small and easy to deal with (i.e. by putting some clay into those holes before pouring epoxy into the molds). It only takes about 20min for this stuff to work but I was afraid to remove the mold that fast and simply let it do its thing over night and made the mold before I went to bed. Very good quality product and I will be using it again.

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!

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.

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.

Works as advertised nice product compared to what I have used in the past

When they say flexible, expect extremely soft flexibility. If you're trying to make something thicker, it'll flatten itself out, spread itself out, intake up to 2 hours to fully cure. To test it, I rolled it into a small ball. However, it would NOT roll into a ball, it was just too soft. I can role Play-Doh into a ball simply. This is like thick glob. I tried everything, but it would not keep its shape. I finally set it on the counter, watched it flatten itself against the countertop, and over an hour later it finally fully dried. I had a half flat, half completely-misshapen ball. This "test" was smaller than a quarter to begin with. After it finally settled, funky shaped, and fully dried, it was much larger than a quarter. Just as bad, it leaves your hands covered in grease. So disappointing. But, if you don't care about any of that, it does dry hard. I'm returning it.

Wow I've been trying all kinds of products but this actually works. It's a putty so you can form it around the detailed bits you are moulding. It is a putty so it's not liquid like others and the model doesn't sink into the silicone. I love it and will definitely buy again.

Lässt sich supereasy verarbeiten um Konturen abzunehmen! Sehr gutes Produkt!

a good price for a good product. Not as flexible as some, but this is the only two part putty I have come across which allows a mend to be made with another small mixing of the putty to seal a split, and blends right in.

A comparación de las otras masillas de silicón, creo que esta marca ofrece más producto por menos dinero,tarda un poquito más de tiempo en catalizar la mezcla lo que te da tiempo de lograr un molde que logre todos los detalles de la pieza, el único incoveniente es que, una vez curado el silicón es muy muy frágil, si le vas a sacar molde a figuras con detalles, extremidades etc lo más probable es que solo puedas usar el molde una vez, otra cosa, si por algún motivo dejaste algún espacio sin cubrir y quieres aplicar otra capa de silicon ya una vez curado, no va pegar, tienes que hacer el molde en un solo intento y de preferencia solo usando una misma bolita de Silicone putty, entonces hay que calcular bien el material, para que salga a la primera. Aún así considero que es un buen producto para hacer moldes que no serán de uso rudo y de preferencia figuras básicas, lo volvería a comprar sobre todo para lograr impresiones o sellos de texturas, usos de ese tipo, sobre todo de emergencia para no recurrir al silicón líquido.

I had a novel project: I was missing one of the wrought iron heads on my new-to-me Victorian railing. I bought this putty, set it around an existing head, and let it cure for 2-3 hours. The mould worked perfectly and I was able to make a near-exact copy of an existing head. The railing looks perfect. This is a quality product able to tackle complex and difficult tasks.