LET'S RESIN Silicone Mold Making Kit Liquid Silicone Rubber 140oz/1 Gallon
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Availability:
In Stock.
Arrives
Saturday, Sep 5
Size: 140 oz
Features
- PREMIUM MOLDS MAKING SILICONE MATERIAL: Our translucent liquid silicone for mold making are platinum-cured silicone, made by safe silicone material, non-toxic and no odor, very flexible, soft and clear. You could also mix mold making silicone rubber with mica powder to create new colors
- EASY MIXING & POURING: This silicone molds making kit includes part A and part B, the mix ratio is 1:1 by weight. Pour the Part A and Part B together, then stir the silicone rubber for 5 minutes, make sure to stir the silicone rubber mixture thoroughly for better results. The working time is 5 minutes at room temperature
- NO BUBBLES: The bubbles of liquid silicone will automatically disappear within 2 hours, no vacuum degassing is necessary. The working time of making mold kit is 5 minutes at room temperature and the complete cure time is at least 6-12 hours at room temperature, it varies on your mold size and thickness. If it's s little sticky, please extend the curing time of silicone rubber
- GREAT FOR BEGINNER: If you're new to the mold making, this mold making kit is a perfect choice for you to try! No special skills or tools are needed. You could enjoy this fun and creative activity all day. HOW to CLEAN: If there's any spill, please clean with soapy water or rubbing alcohol
- WIDE APPLICATION: It's very ideal for art craft use, DIY your own resin molds, wax molds, candle molds, soap molds, use to make silicone molds for resin casting, wax, candle,soap making, etc. If you have any question with LET'S RESIN molding silicone kit, please don't hesitate to contact us
Description
LET'S RESIN is an open community that connects resin enthusiasts all over the world. We provide tools, you steer the way Life is a journey. We experience, suffer, collect the moments that inspire people, and cheer ourselves up. We want to keep those moments in a way that can be stored and shared beautifully with our loved ones. We created LET’S RESIN to help people with that. LET’S RESIN offers powerful and affordable toolsets and materials, helping people to build their imagination into reality. 15A SILICONE RUBBER 10A SILICONE RUBBER 20A SILICONE RUBBER 30A SILICONE RUBBER 10A SILICONE RUBBER SILICONE FOR TABA SQUISHY SILICONE PUTTY 1. Test in small batches before use; 2. In case of incompatible casting materials, apply a layer of sealant or epoxy resin first, and then proceed with the operation Why is the silicone not fully cured? Please check the following reasons : 1. Incompatible casting materials, you can test in small batches; 2. Inaccurate mixing ratio, mixing by weight 1:1 ratio; 3. The bottom and edges need to be stirred into place if it is not completely mixed How to remove air bubbles? 1. Use vacuum machine; 2. If there is no vacuum equipment, you can gently stir in a uniform direction to reduce bubbles; 3. Store in the refrigerator for 1 hour until natural defoaming How do I choose the right silicone for my project? According to the hardness selection, less than 15A is used to make small complex objects, 15A is the most suitable hardness to make a variety of molds, higher than 15A to make separate large molds What is the difference between platinum curing and tin curing? Platinum-cured silicone rubber is more durable than tin-cured silicone rubber, and our silicone rubber belongs to platinum-cured silicone rubber. How to extend the service life of silicone mold? 1. After each use, clean the mold in time to remove residual materials and impurities to avoid corrosion and wear; 2. In the process of use, try to avoid applying too much tension to the mold
Material: Silicone
Color: Clear
Brand: LET'S RESIN
Item dimensions L x W x H: 3.94 x 3.94 x 1.97 inches
Shape: Round
Brand Name: LET'S RESIN
Number of Pieces: 1
Number of Items: 2
Unit Count: 1 Count
Model Number: ALR00016
Manufacturer Part Number: ALR00016
Warranty Description: 3 months
Color: Clear
Shape: Round
Material Type: Silicone
Item Dimensions: 3.94 x 3.94 x 1.97 inches
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Saturday, Sep 5
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Size: 20.46 oz
I received this product, dumped the liquid from each bottle into a bowl, stirred for about 4 minutes, then poured the mix into my mold to make a seal for a 36" by 16" case for testing air quality monitors. I waited a day, and the seal that I had poured was still in a liquid state. To my surprise, and the reason the seal was still liquid, is because both bottles contained the same formula. Part A and Part B was exactly the same, so why the solution didn't solidify. I contacted the seller, and have not received any response from them, so I cannot recommend this product to anyone without saying that Please make sure that both bottles contain the appropriate liquid before mixing, and wasting your time. It is taking me a number of days trying to drain and clean out my mold so that I can do another pour with a different product from someone else. This goes to quality control, and obviously there is none, and also the customer support is definitely not there either, so buy at your own risk... Update: I would like to say a big thank you to the seller, as they finally contacted me, and ultimately corrected the problem by sending out a set of correctly labeled bottles. The seller went above and beyond to resolve the issue I had with getting a messed up order. Just PLEASE, be very careful when getting yours, that you first do a small test mix to make sure you don't have the frustration I had. Both A and B parts look exactly the same, so when I received miss-labeled bottles, I couldn't tell before mixing that it was not going to set up before creating a huge mess for myself - that took 3 days to get cleaned up before making a new pour with a set of properly labeled bottles of silicone. I wanted to do the right thing by updating my experience with the sellers' help and support, and also why I changed the 1 star to 5, because when it works - it works great, so just be careful to do a small test mix before doing a major pour like I did, because whatever hair you have left - you want to keep LOL.
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Reviewed in the United States on January 23, 2024 by Outside In
Size: 20.46 oz
This is a great product at a great price. I made a 3mm test sheet and can't tear it. It's nice and soft. If you have trouble with it not curing, you need to mix with the double cup method. Stir for 30 seconds (scraping the sides) then pour into a second clean cup and mix for two mins. After pouring, place in your oven with just the light on to speed up curing.
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Reviewed in the United States on August 3, 2026 by Kris William Faller
Size: 20.46 oz
This review will be edited time to time for updates! (UPDATE) Still a great silicone product for beginners! I made a second mold and made things in my first mold to compare them to their originals. I will be attaching another photo. Left is originals, right is copies from being in the mold(besides the cookies, I accidentally switched those.) I will upload a pic of my second mold as well! I am going to be switching to another molding product soon as I feel I want a tougher silicone but this was so fun to work with and such an inexpensive option for those who just want to make a few things on hand for back up pieces. My second mold's silicone was mixed more thoroughly than my first and cured much faster. The first mold took about 3 days to not be sticky because I didn't stir very well. make sure if you're using tape on the bottom when pouring and make sure you are taping very FLAT and fold the edges upward around your container because even with hot glue you can get leaks! 1st Impressions: LOVE! Very easy to work with, mixes easily and adding a little mica powder for some fun color was NO problem. I only had to wait 3-4 hours to take it out but I'd suggest you wait the entire 24. I think I may have ripped a teeny part on accident pulling it up out of impatience. I am attaching a photo of my mold. I needed extras of pieces I use for personal use. You can never have too many cabochons! I will come back and post pics of pieces made in the mold and update with how the mold did! Sorry the designs are so hard to see in the photo, the mica powder is pearlized. BY THE WAY: I had 1 TEENY bubble and I checked my piece to make sure it wasn't the issue but it may have been because it was slightly not flat in the area it bubbled. Nothing a quick glaze or dome can't fix. The silicone seems strong but I am still waiting to use it as it has only been 12 hours and I want to make sure I don't ruin it. If your mold is still sticky in ANY spots either you did not mix properly or you need to let it cure a LOT more.
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Reviewed in the United States on October 27, 2019 by Carol Wilson
Size: 140 oz
Very nice silicone to work with. Molds come out beautifully and the resin pieces made from the molds are flawless. I gave 4 stars becasue I do not know why LR calls this a "kit". Kits typically come with something else included such as gloves, stir sticks, measure cups. I use another silicone that is a true kit but they do not sell larger quantities.
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Reviewed in the United States on July 4, 2026 by CC
Size: 20.46 oz
I was in the middle of a time-sensitive commissioned piece and the low-quality silicone I had failed on me with inhibition issues. Was in a panic so ordered this with the 3-hour delivery option and was able to complete the job. I've used Let's Resin products before so figured it was a safe bet, and I was right - the silicone cured quickly and perfectly. Instructions say to mix it for 3-5 minutes but out of paranoia I always mix my silicone for 6 or 7 to ensure both parts are fully incorporated. Mixed inside an HDPE container as it's chemically inert, won't cause silicone inhibition. My setup was basic - a common brand "can of stacking potato chips" as the mold box (cleaned & scrubbed first) then the plaster piece in the middle. I always do all my pours from 2 feet off the mold in a very thin stream. This seemed to degas by itself perfectly without any bubbles. Starting temp: 77F at 4 PM, by 8 PM it was around 69F outside. By 12AM it was 60 degrees. Humidity ~75%. Just to give an idea of atmosphere vs curing time. It cured much quicker than I thought - I could touch the mold and it was firm in around an hour with no tackiness or residue, but I let it go 8 just in case. Resulting mold is firm with perfect curing, no stickiness / inhibition whatsoever. Since it's platinum cure and my piece wasn't porous there was no mold release needed. I will be buying this brand again, but next time I'm springing for the gallon size as I make molds rather frequently and it ends up being less expensive in t!he long run!
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Reviewed in the United States on June 17, 2026 by Fuzzy Logic
Size: 20.46 oz
This set was purchased to make "picky pads" with students. This is easy to measure, mix, and pour with very clear directions. Clean up can be a little sticky but I suspect that is the case with materials like this in general. Would purchase again.
Reviewed in the United States on June 10, 2026 by ChrissyMiss
Size: 140 oz
worked great for me,, there was one sticky spot that didnt cure 100%, i just rubbed some corn starch on it and it was fine.
Reviewed in the United States on June 24, 2026 by Matthew Pryke
Size: 20.46 oz
I wanted to replicate a mold that I already own. I wanted multiple copies of the same item so I can hopefully use them for candle making. I was definitely successful in creating a mold with this. The instructions were easy to follow. I filled my original mold with hot glue and made a bunch of copies of the cactus. I then built mold cavities. One out of legos from dollar tree and one from cookie cutters. I took contact paper and put it upside down and placed the mold walls on that and applied hot glue in order to hold it down and make sure there was no leakage. I measured on a scale part an and part b. There was a ton of bubbles and that made me really nervous! However in my finished product i barely saw any bubbles. I sat there and babysat this for at least a half hour blowing through a straw at any big bubbles I saw . I messed up on the bigger mold in my pics by not gluing down the items and instead trusting that dollar tree contact paper was strong enough to hold them down! A few of my cactuses floated to the surface and will now forever be entombed in silicone! I still got a few viable mold cavities. After the first half of the bottles were gone I decided to go ahead and try a second time. This time was a disaster! Once the bottle is half empty is is damn near impossible to get part B to come out of the bottle! The bottles are hard and don’t squeeze so you have to sit there waiting for it to slowly drip out! My scale turned off several times in the process which made things even more difficult! Part B should come in a tub or squeeze tube! Eventually I went into my garage and sawed off the top of the bottle so I could get a spatula in there and scrape it out! I even tried warming the bottles like you do with a baby bottle to get it to liquify more but that didn’t do much. It did help reduce some of the bubbles but it didn’t help part B move out of the bottle. I think possible storing the bottles upside down may help with getting the remaining few ounces out but I highly suggest they change the packaging somehow. Maybe put part b in a tub so that you can get it out easier. The more fussing you do with the stuff the more bubbles you introduce. The molds came out pretty good though and I even tried one with hot glue and it worked quite well. I would love to buy more and try more but not if they don’t somehow change the packaging. This is almost a waste because it’s so hard to get the remaining few ounces out of the bottle! UPDATE: I emailed let’s resin to ask them what I can do to get rid of the sticky residue that was left over on the top and bottom surface of the mold. At first they tried to insinuate I somehow didn’t measure and/or mix it properly and so I provided them with a video of me making my molds. Once they saw the video they then sent me an email telling me that it’s because I used “hot melt glue” as a master mold. They sent along part of their instructions where it does say that there could be potential curing issues with the “hot melt glue”. I don’t see how that is possible. The glue was fully cured and hardened for over 24 hours before I used it. In the instructions it says that the part that comes in contact with the “contaminate” may not cure properly. In my case, that is the ONLY part of the mold that actually cured properly! The mold functions properly. I’ve used it to cast already. It’s just the entire rest of the mold is tacky, causing hair and dust to stick to it. I would love one of their chemists to explain how cured hot glue will effect parts of the silicone mold that it didn’t even come in contact with such as the bottom, top and side surfaces of the mold! Sounds like a bunch of BS if you ask me and a company that just doesn’t want to take responsibility for perhaps a bad batch of silicone. I see other reviews here saying the same thing about the sticky residue and they did not use “hot melt glue” for their master mold. I mean right in the instructions that they sent to me and highlighted it says that the parts that come in contact with the substance that is supposedly a contaminate, is the part that wouldn’t cure right, so how is it that the rest of the mold is sticky? Makes no sense at all! They seem to be doing all they can to avoid having to replace items! I wasn’t even asking them for a replacement! I was just asking if there’s a way to get rid of the sticky residue! I emailed different resin company about an issue I had with their product and that time it was MY error and they replaced the bottles for me for free without me even asking! That’s a company that does right by their customers. This company is trying to avoid fault at all costs! Just be wary! If you ask questions they will do whatever they can to avoid blame and make it your fault, even if it doesn’t make sense!! As you can see in my photos, the casted part that actually came in contact with the cured “hot melt glue” came out perfectly fine. It is the entire rest of the mold that’s slightly tacky.
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Reviewed in the United States on January 30, 2025 by Makeup Mobster