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A secondary how-to describes making small craft molds from 100% silicone caulk and cornstarch, with a suggested starting ratio of one part of each by volume. The matching Make: project article establishes the project context but its accessible text does not give those measurements. Treat the recipe below as that how-to’s instructions—not as a tested or guaranteed formula.
What this putty recipe is for
The recipe is intended to make a mold around a small master object, which can then be used to cast craft materials. Make: describes casting as useful beyond jewelry and decorative crafts, including for custom knobs, pulls, and art pieces. The TechBloat how-to names resin, plaster, wax, and clay as possible casting materials; suitability can depend on the specific material and mold, and the reviewed sources do not independently verify those uses.
Make: published Haley Pierson-Cox’s project article on June 9, 2015, with an April 1, 2018 date displayed on the page, and links to a video tutorial by Mark Montano. Its accessible text does not include the detailed recipe measurements. The measurements and method here come from the separate TechBloat how-to; the project context is in Make:.
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- Simple Mold Making Kit: Two part silicone mold putty.Simply mix equal parts A (blue) and B (white) by hand.Place on the surface of any item and make your favorite molds for resin, soap, wax, clay, and more with this amazing silicone putty
- Great for Beginners: 5 minutes working time, 15-20 minutes demolding time, the silicone mold making kit doesn't require any equipment, cups, or stir sticks, it allows you to make special molds easily.Great for beginners and professionals looking to be productive
- Premium Mold Making Silicone: LET'S RESIN silicone putty mold making kit is made of high-quality materials, non-toxic, odorless, strong, and flexible.The maximum temperature that can be tolerated is 392℉/200℃.Make your entire DIY process fast, easy, and safe
- Wide Application: The silicone mold making putty Ideal for making resin, soap, wax, clay, tabletop games, prototyping, art restoration, sculpture, jewelry making, 3D printing, DIY gaskets and seals, concrete, and more
- Quality Service: LET'S RESIN attaches great importance to consumer experience and will continue to update and optimize products.If you encounter any problems when using LET'S RESIN products, please contact us in time.We will provide good service to ensure your shopping experience
Ingredients and starting ratio
- 100% silicone caulk
- Cornstarch
- Optional: a small amount of glycerin or water, as described by the TechBloat how-to
TechBloat suggests starting with one part caulk to one part cornstarch by volume, then adjusting the texture in small increments. This is that page’s recommendation, not a formula independently validated by the sources cited here. Do not assume that changing brands, ingredients, or proportions will produce the same working or curing behavior.
How to make and use the putty
- Prepare first. Set up a ventilated work area, protect the work surface, and have the clean master object ready before mixing.
- Combine the ingredients. Mix the caulk and cornstarch at the suggested starting ratio. If needed, add a small amount of glycerin or water and adjust gradually, following the recipe source’s advice.
- Knead until uniform. Work the mixture until it appears consistent, as the TechBloat instructions describe.
- Form the mold. Press the master object into the putty to create its impression.
- Let it set, then demold. The source says to allow the putty to set before removing the master. It does not establish a dependable working-time or cure-time figure; conditions and materials can affect both.
Safety and food-use limits
Use ventilation, particularly with standard acetoxy silicone, and follow the handling directions on the specific materials you choose. Keep the mixture away from eyes and skin and avoid treating household ingredients as harmless simply because they are familiar.
Rank #2
- MOLD MAKING SIMPLIFIED - Make molds effortlessly by blending equal portions of A (White) and B (Blue) and mix manually until the color is consistent. Adheres firmly to surface of any item. Easily produces durable and reusable molds of high quality.
- PERFECT FOR BEGINNERS - With a 3-minute working time and a 15-20 minute demolding time. This silicone mold making kit eliminates the need for equipment, cups, or stir sticks, making it ideal for both beginners and professionals seeking efficiency.
- SAFE & PREMIUM - Crafted from high-quality, non-toxic, odorless, strong, and flexible materials, ensuring a fast, easy, and safe DIY process. Our silicone putty mold making kit can withstand temperatures up to 392℉/200℃.
- MULTIPURPOSE - Specifically formulated for resin molds making, soap, wax, polymer clay, tabletop games, prototype reproduction, jewelry making, 3D printing, art restoration, casting molds and making molds of architectural details, statues, figurines!
- COST-EFFECTIVE - Whatever newbie or pro, you could easily create the molds and crafts you desire! Click ‘Add to Cart’ and enjoy your creative DIY craft making. If there is any question, please do not hesitate to contact us.
Do not use this craft putty or a mold made from it for food unless every ingredient and the finished mold are specifically food-safe. Ordinary craft silicone caulk and household additives should not be presumed food-safe.
Homemade putty or purpose-made silicone putty?
These are distinct options. The caulk-and-cornstarch recipe is a DIY approach described by TechBloat; purpose-made two-part silicone putty has its own manufacturer instructions and product-specific properties. For example, Solid Solutions instructs users to mix its putty 1:1 by weight and lists a 15–30 minute cure. Those specifications apply to that product, not homemade caulk putty. The retailer also advises ventilation, avoiding eye and skin contact, and wearing protective gloves and glasses. See Solid Solutions’ product guidance.
Rank #3
- User-Friendly 1:1 Mix Formula: No complicated measuring required! Our A(White) & B(Blue) silicone putty for moulds adopts a convenient 1:1 volume ratio—just knead by hand till full colour blending. This silicone moulding paste offers a foolproof way to craft sturdy, long-lasting reusable custom moulds with excellent finish.
- Beginner-Friendly Fast Curing Performance: Boasts around 3 mins usable operating time and 10–20 mins full curing for demoulding. As a versatile silicone molding clay, no extra mixing containers or tools are needed. This craft silicone putty is friendly for starters while boosting efficiency for experienced crafters.
- Safe Silicone Raw Material: Made of selected non-toxic, odour‑free flexible silicone for mould making, secure for all family DIY projects. This flexible silicone mold compound exhibits outstanding heat resistance up to 200℃/392℉, making it ideal for diverse high-temperature casting work.
- Wide Versatile DIY Application: This silicone putty moulding compound excels across massive crafting fields—epoxy resin casting, handmade soap, scented candles, polymer clay, miniature figurines, jewellery, tabletop miniatures, architectural detailing, antique repair, and prototype duplication. Works like silicone clay for any shape you imagine.
- Great Value for All Crafters: Whether you’re a novice or skilled enthusiast, this moulding putty lets you customise exclusive handmade moulds effortlessly. Unlike standard dental putty, our silicone molding compound is tailored for creative projects. Grab this silicone molding putty kit to unlock inspiration—contact our customer service anytime for pre‑purchase or usage queries.
Compare options using criteria that matter for your project:
- Mixing: the DIY source gives a volume ratio; Solid Solutions gives a weight ratio for its own putty.
- Time: the purpose-made product’s listed cure time is product-specific; the DIY recipe has no established timing guarantee in the cited sources.
- Fit for the casting: check the product’s instructions and compatibility with the material you plan to cast, rather than assuming the homemade mixture and a purpose-made putty behave alike.
- Handling: follow the safety and use instructions for the exact material, including ventilation and protective equipment where specified.
A Fab Academy project team reported that Mold Star 30 offered its preferred balance of demolding flexibility and detail among the materials it tested. That is one project team’s observation, not a universal ranking or a guarantee for a particular mold. See the Fab Academy project.
Rank #4
- FAST MOLD IMPRESSIONS: Molds can be made in less than 20 minutes using this 2 part silicone putty. Whether you're making bath bombs, polymer clay or sweet treats, our silicone molds can produce them fast!
- PERFECT FOR CRAFTS CLASSES: Looking for the best putties for your next art workshop? You can quickly create customized molds with our mold maker, making it optimal for crafting classes. Amazing Mold Putty is ideal for beginners and professionals alike.
- MIMIC YOUR ORIGINALS: With the Amazing Mold Putty Kit, you can create custom resin molds of valuable antiques or any of your favorite figurines. You can clone any 3d object you want - and you’ll be able to reproduce an exact replica of the original.
- FOOD SAFE FOR CULINARY USE: Are you fond of baking cookies or desserts at home? This two-part moldable compound can be used to create pastries because it's completely non-toxic and FDA compliant when fully cured. These food grade molds can be made for candies, gummi bears, gelatin, bento box food, popsicles, cake decorations, and more!
- FUN MIXING: Using these mold-making kits will transport you back to childhood. The mixture is soft and stretchy, like play-dough. Mixing it won't even require precise measurements. Mix yellow and white putty 1:1 by hand until uniform. Then roll over the item to be molded. After 3 minutes, your molds will start to set.
What “reusable” does—and does not—promise
The recipe is presented as a reusable casting-mold approach, but the cited sources do not establish a reuse count, a guaranteed lifespan, or a success rate for the homemade mixture. Treat each mold’s durability as uncertain rather than planning around a specific number of casts.
Quick Recap
Best Value
- Mold Making Made Easy - Easily make your own molds by combining equal parts of A (White) and B (Blue) and mix by hand until uniform color. Stays in place on most surfaces. No mixing containers, mold boxes, degassing equipment required. Creates strong, flexible, reusable, commercial quality molds.
- Work Time - The Pixiss Mold Putty has a 3 minute work time and a 20-30 minute demold time (25°C / 77°F). Great for beginners looking to try mold making and for professionals looking for higher quality product.
- Multi-Purpose - Perfect for Clays, Resins, Epoxies, Prototype Reproduction, PMC & Polymer Clay, Soap, Art Restoration, Sculpture, Plaster, Wax, Low Melt Metals, Jewelry Making, Tabletop Gaming, Cosplay, 3D Printing, DIY Gaskets & Seals, Concrete and More.
- High Quality - Our Mold Making Putty is a high quality putty that was designed in the USA.
- Great for Artists of All Skill Levels - Great for beginners looking to try mold making and for professionals looking for higher quality product.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
