Making moulds of something to make silicone products

Hi all. I have an item that I need to make silicone copies of. I don't want silicone moulds, but the actual end product to be silicone. What is the best way to do this? I have tried looking up but everything is "silicone moulds for xxx" and not what I want. Thanks!

Posted by JackOGara94 3 years ago

Freeze Silicone ?

Silicone earplugs: Damaged by freezing? Y/N? How closely are these earplugs related to silicone caulk? Is silicone caulk ruined by freezing? The earplugs are currently in my car24-7.  bad idea in December?

Posted by Toga_Dan 1 year ago

Silicone RTV

Hey guys I have Silicone RTV for sale contact me at

Posted by grunt1612 6 years ago

Does anyone make their own silicone molds? I have questions for you

I was looking for a rectangle silicone mold to use for cold processed soap. I saw several that were called "soap mold liners". They were used to line or fit inside wooden soap molds. Right now if a soap maker uses a wooden mold, a lot of time is spent lining the mold with plastic wrap, or freezer paper......usually with less than stellar results. Silicone seems to be the answer. When I finally tracked down the silicone liners, I also found out that this company is no longer in business....... My DH made me a wonderful mold out of a large thick plastic (HDPE) cutting board, BUT while the soap doesn't leak out, or react to the plastic, it IS difficult to get the soap to "let go" of the plastic, so I end up lining it just to simplify the process. I would like to make my own liner from silicone IF I could get some direction form someone in the know. I have seen directions on the internet, but I think those are mainly ads to sell their product. My questions What silicone (brand) is best for a first timer? which release agent (brand)? could I use the actual HDPE soap mold as the outside of the mold without the silicone or release agent hurting it? can wood be used as the "mold" to create the cavity? Doe the wood have to be treated? where would I find these products Any other "suggestions" or advice? Thanks Mary

Posted by MaryT8M 6 years ago

How to glue silicone to leather ?

Hi I need to glue silicone to leather, i've tried to glue it with various glue but it always comes off... is there any known way to glue very good , silicone to leather ? thanks!

Posted by giorgiomartini 4 years ago

A question about Pewter casting

Hullo, just had a call from my mate who wants to do abit of pewter casting, now he had a very specific question about molds and the silicone to use, I had a look round but no one mentions a particular sort, I thought all silicone is silicone ... but decided to bring the question to the experts To make a silicone mold, for pewter casting, what sort of silicone should my friend use? He shall be making a belt buckle from what i gather. Thanks chaps Biggsy

Posted by Biggsy 7 years ago

How to make a 3D soft silicone iPhone 4S/5 case?

I was wondering if its possible to make a soft silicone iPhone 4S case at home? And how? What products would I use? I have a idea so it would look something like these. Thanks!!!!!!! 😜

Posted by Dorthydrinkahwater 5 years ago

Mold for Polyurethane Resin?

Hello, I purchased a Polyurethane Resin mix (Part A/Part B) to create a guitar. I’m wondering though what material I can use to create the Mold? I normally work with Wood, so this is all new and exciting, but oh so confusing. Can I create a mold out of wood and coat it with a silicone spray? Do I need to use some other non-porous material? Any insight would be excellent. Thanks, Rich

Posted by Coda24 8 years ago

silicone stuff

Long time listener. First time caller. Excited to be on your show guys. What I would like to do is make my own silicone bracelets / bands. Like Lance the liar Livestrong bands. But cooler. I've seen lots of posts on creating silicone molds. I think I can figure that part out. What I haven't found is a discussion on molding stretchy, rubbery silicone stuff. In my case - wrist bands.  Anyone here have an idea on what to use and how/where to purchase? I chatted with the kids at Make Your Own Molds and they were helpful on making my mold. But they couldn't recommend a site to buy the silicone for the bands. Help!!

Posted by wiinkme 5 years ago

Experience with the Flexil/Vinamold/Gelflex hot melt vinyl rubber?

Hey again,Does anyone have any experience with this Flexil hot melt rubber stuff I've seen about. It's a vinyl rubber that you melt in a pot around 170 degrees and then pour it over masters and formers to create moulds like you would with RTV silicone (except quite hot). The rubber can be remelted which is a benefit over silicone, but does anyone know of reasons why silicone is better for making moulds with (other than the master possibly melting).Link here:, CFS is also a good place to buy pretty much all casting and moulding materials if you're in the UK at somewhat reasonable prices :-)

Posted by chiok 9 years ago

Custom PC Keyboard protector

I'd like to make a custom fit computer keyboard protector, the type that's made to stay on while the keyboard is in use. This Ducky cover;=999 is very nice, but rare.  Most keyboards have no properly fitting cover available. Also, it would be awesome to say 'I did that.'   What material would be best, silicone?  What mold material? Maybe I could cover the keyboard with plastic film and spray some silicone on top?   It has to be really thin.  I'm guessing pros would use a bottom mold, then squeeze a top mold own on it. Thanks.

Posted by catsintrubles 2 years ago

Bunion separators made to suit an individual

Hi there, Does anyone have ideas on how to make/get hold of a silicon type material to make moulds of so called toe separators.   Something which could be made to an individual's needs, i.e. I would make it for myself and if it works, to share it publicly, as I am sure those who suffer from having bunions would benefit extremely.  Unfortunately the products available on the market most of the time don't work (and is waste of money and resources), as all of us have different toes, feet, alignments etc. Any ideas on how to make such material at home and cheaply are very welcome. THANK you in advance! To peace and comfy feet for all! P.S. I have attached a few photos of these products to give you an idea of what I mean.  The silicone which is used is soft but sturdy enough, which doesn't hurt the joints of the toes.  It would be great to be able to mould these around flip flops (and other shoes) permanently - so that they don't move about.

Posted by okcuga 3 years ago

How do I make a DIY gel wrist support?

I really wanted to MAKE a "gel" wrist support for someone for Christmas.  The prices are outrageous.  Can someone tell me if it's possible to create this at home?  Thanks.

Posted by Soose 6 years ago

what kind of silicone (or similar) for non-slip mod to cases (or most anything)

Alright, I recently purchased a cheap silicone case for my new iPod, and it doesn't have the non-slip feature that the one on my old iPod (which got stolen) had. I really liked that, since it didn't slide around on the seat next to me while driving, so I could reach over and change the song without endangering myself and others. I was thinking of making an instructable on making any kind of case non-slip by adding a glue- or caulk-like silicone to the back of the case that can come in (or at least be modified to be ) any color. My plan is to give the old Tron-like lines to the case, to add non-slip functionality, but also to look cool (and cyberpunk). My question is, what kind of silicone (or like substance) would that be possible with? I'm assuming it would be able to last the life of the iPod, because a temporary mod (like perhaps one using creepy-crawlers mix or something of that sort would seem to be) would just not be practical.

Posted by FireSBurnsmuP 8 years ago

Removing silicon from pcbs (leave the copper patterns)

How can you dissolve the silicon (and possibly solder) off of a PCB to leave the copper traces? Thanks

Posted by LinuxH4x0r 10 years ago

Secure Bamboo Poles (150mm diameter) to top of wall (replace coving)

Hi there I have 2 x 3m Bamboo split poles to secure to the top of wall as a border/replacement for coving.What would be the best way to secure to the wall? I cannot hammer into the wall due to a pipe running behind where the bamboo will go.Velcro? Silicone? Double-sided adhesive pads/strips?Don' want it falling down during a meeting LOL

Posted by GregoryD45 6 months ago

A new trick for the oogoo fans..?

Would folks who have played with Oogoo please try out the formulation at the link below:                                                           Noogoo and let me know if a) it works for you too; b) whether or not there are any differences/advantages over the initial Oogoo formula; and 3) you can see any applications for it different from standard Oogoo? It's not a published Instructable yet, I want to make sure there's something here worth using before I make a permanent post of it. Thanks, G

Posted by gtoal 7 years ago

How-to: Silicon Molding for the Hydra?

I am a complete n00b. Much help is obliged. I had recently bought a Hydra and was considering building a wooden chassis, but had thought of making a silicon molding instead. Does anyone know how to make a molding for a motherboard chassis? Thanks!

Posted by 76john 10 years ago

Silicone or petroleum jelly for my rubiks cube

I need to lubricate my rubiks cube should i use petroleum jelly or silicone

Posted by sk8master 9 years ago

Silicon Sunset

Here's a photo I took of an Imminent(ish) Instructable.  No particular reason.

Posted by AndyGadget 7 years ago

Attach membrame to silicon housing

Burning question! I am trying to attach a membrame (which is made of latex at the moment) to a silicon housing (see attachment). The membrame should be a able to move vertically and thus expand a bit. The two challenges are: - The membrame should not be to thin, because otherwise it snaps and; - The membrame should not be to thick, because otherwise their is too much pressier on the sides and it also snaps. The membrame and the silicon housing should be airtied. The material of the membrame can change, although it needs to be flexible of course. Any tips on which material to use for the membrame or on assembly techniques? Cheers, Thijs

Posted by thijss 3 years ago

3D printed personalised silicone ice

Hello all, I'm trying to 3D print food grade silicone ice in different little shapes such as boots, tires and cans. Does anyone know of such 3D printing company? Thank you very much, Chantal

Posted by chantal.goldfinger 3 years ago

Casting pewter in RTV Silicone

I want to reproduce a bit of jewellery I have designed in pewter by using a 2-part RTV silicone mould. By all accounts it is possible but I've run into some problems when sourcing materials. Most high temperature silicones I have come across state a maximum temperature of 250°C, But pewter has a melting point of around 280°C. My feeling is that the mould itself will most likely never actually reach 280°C and will probably only be above 250°C for a short period of time. But I'm wondering if anyone has actually done this and could verify for me. Also as I'm new to the whole process, any other tips are welcomed. This is the high temp silicone I'm currently looking at. Thanks,                -Tom

Posted by madmanmoe64 6 years ago

Is oogoo (DIY Silicone Putty) Oven-safe?

Hello! I have a question for people who use oogoo, or generally DIY silicone molding putty made from 100% silicone caulk. I want to cast oogoo molds of lego bionicle masks with polymer clay, but my issue is I need to keep the clay inside the mold in order to prevent any kind of warping, as most of it is spread a little thin (1-2mm thickness) and I don't want to end up warping it even in the slightest. Is oogoo or cured 100% silicone caulk oven-safe as long as it's within the specified temperature range? (I already know most DIY silicone putties aren't food-grade.) The silicone caulk I'm using is GE all purpose silicone I, mixed with corn starch, acrylic paint, and baby oil. The back of the tube says that it should not be used on surfaces that will exceed 400F/205C. The polymer clay I plan on using is cured at 110C, so I don't think it'll be a problem, but I'm worried exposing the silicone caulk mold to high temperatures will cause it to release some harmful chemical compounds. I looked up an MSDS sheet for GE silicone, and they had a generalized one stating exceeding the maximum temperature will cause the release of formaldehyde. Since I plan on baking these in our kitchen oven, I wouldn't want harmful chemicals contaminating a space where we cook our food. Also, if baking isn't an option, since the polymer clay is spread thin, and cures close to 100C, would curing it in boiling water be an option? (That way any water soluble chemicals would remain contained while the clay hardens.) All help is appreciated!

Posted by SixFootBlue 3 years ago

AC187 Transistor Alternative???

Hi I was wondering if anyone knew of any Silicon or Germanium alternatives to the AC187 Transistor. Also is the BC548 or BC547 Silicon Transistor an alternative to the AC187 Germanium transistor?  Thanks in advance

Posted by Ikram1ali 3 years ago

underwater silicon cover

Hi everyone, I see and i'd like to make it by myself, I think it's not so difficult but I need some expertise I don't have that you can give it to me...^_^ i'd like to start from this bag, cut it and mold some pieces to fit the Camera size and shape, do you know how to make waterproof seams on this material? hot,glue or what to make it impermeable? hope you can help me and make my next holydays great with underwater shoots!

Posted by cavalars 5 years ago

I think I won the silicon lottery.

Just though I'd show you this. PC Specs: i7 2600k @ 4429MHz 8GB Corsair Vengeance + 8GB GSkill Ripjaws X @ 1600MHz (Not currently in the machine) Asus P8P67 Pro Corsair H80 with the fans off of a Thermaltake Frio Thermaltake Chaser MK I Chassis AMD Radeon 5770

Posted by Millawi Legend 6 years ago

Release agent for creating oogoo object with oogoo mold?

Hey all, I have a mold of a webcam which, due to steep undercuts, I made with oogoo.  Worked great! Now I want to make a rubber duplicate off of that.  Only problem is silicone sticks to silicone like crazy! First I tried a sample with cooking oil and also wd-40.  It still stuck.  I heard cooking spray is a no-go since it actually contains silicone.  In fact, they say that's what most cans of mold-release you buy are made out of.  Just cooking spray!  Interesting factoid, but doesn't solve today's problem. A mold-making book I found at the library said something called "spray wax" is what you need.  After searching Amazon and Smooth-on plastics I wasn't able to find any mold release called that, so I just tried grabbing some cheap spray-on car wax from Walmart.  That's either not the same thing, or oogoo is too different from the official casting silicone that the book was talking about. Anyway, I'm about out of clues now.  Anybody got any more tips?

Posted by PS118 5 years ago

Aluminum Casting with 3D Prints

Is there any reliant and consist way to create high RPM gears using 3D prints? What I had planned to do is 3D print some gears out, make silicon molds out of them and then pouring wax in the silicon molds. I then would put the wax into sand and then pour molten aluminum into it. To me, it sounds good in theory but I thought somebody else might have tried making PLA 3D prints into metal.

Posted by rexdino5 3 years ago

how to make a custom o-ring for shower deviator

I am in need of an o-ring replacement for an unidentifiable bathroom faucet shower diverter. Unidentified probably means Chinese. And these things often have no product replacement parts. I am sure there must be a way to make a replacement either out of rubber or silicone either by 3D printer or some kind of mold. I would appreciate any kind of help - either someone with a 3D printer who could make one or a mold for silicone or melted rubber. I don't mind paying for this as I'm sure it would cost considerably less than replacing the whole magilla. I'm thinking of the kind of rubber used for bottle stoppers that empty air from wine bottles; or some way to make this o-ring. The dimensions are in the attached images. I an furnish more images if necessary and contact info.

Posted by philjor 3 years ago

500 Glass Diodes

Selling 500 assorted glass diodes. To purchase go to ";=item3cb096e063#ht_500wt_1154" Thanks

Posted by tinstructable 8 years ago

Advice on lost wax casting

I am looking at the cheapest way to begin casting pewter with the lost wax casting or with creating rtv silicone molds and it looks like dental wax is generally the same as jeweller's wax. I would like to know if this product looks suitable for carving for lost wax casting: I would of course melt it to make blocks to carve from. It looks like it would do the job, carving wax seems to be really expensive in whatever form. Im also looking at using silicone and corn starch. thank you

Posted by lsadwdwadw 5 years ago

How a CPU is born

    While doing some research, I saw a link that said "How CPUs Are Made: From Sand to Silicon". Mildly intrigued and not knowing anything about how they are made, I clicked and went to the page and read.     The article briefly runs through a highly abridged series of steps in the making of what eventually turns out to be an Intel i7 processor. It starts off with the raw materials (SiO2, e.g., sand) and how they turn it into monstrous (about 220 pounds!), essentially pure, silicon ingots from which wafers are made. and many steps later the processors are boxed up and ready for store shelves.

Posted by The Ideanator 7 years ago

Attempting to make my own toe prosthesis...

Any helpful suggestions? I'll explain my situation: I have a partial right big toe amputation. basically, the entire tip end where the nail is supposed to be is gone, right to the joint, leaving me with a stubby, short half-toe. I've found some companies that will make realistic prosthetic toes, fingers, ears, etc, but the cost is too much for me. ($3000 for something with a life expectancy of only 2 -3 years!) I've decided to make my own using silicone. My plan is to make a mold of my sister's toe and fill it with silicone. I'll also mold my poor little stub, make a plaster replica of it, and stick it into the silicone-filled mold of my sister's toe. The idea is to custom-fit it to my toe. The parts that I'm finding difficult are painting it to look realistic, and also finding an acrylic nail large enough to pass as a large toenail. If anyone has any suggestions, or even a better method, please feel free to enlighten me! Thanks.

Posted by i_do_not_mow_lawns 11 years ago

torch underwater

Who has a idea for a torch underwater?? I search a solution for a cheap solution I have a good lamp very strong, that i want convert a underwater. Who help me? The lamp is very big, and the handle is anatomic, same a pistol grip, with a big oblo about 15cm, the lamp is rechargeable. Can I use the silicone, for the oblo closing? If a day i must change a lamp (struck), i can use a knife and after the change a new layer of silicone. Is a good idea? Who Can support for better solution? Thanks e sorry for the language (i am italian and don't speak well )

Posted by rikk_58 8 years ago

what to do with solar panels ans tiny capacitors

I have a .3 amp .55vdc silicon solar panel what should i make i also have a few tiny capacitors i cant really tell what they require or output.

Posted by Rotten 11 years ago

Convert Crayons into 2mm+ Leads Like Graphite Lead

Hello! I want to recycle crayons and thought of converting them into 2mm lead or larger in diameter (since there’s only a certain thickness where crayons can be sturdy). I also thought the crayons should be mixed with something since they’re wax. I was thinking of buying a silicone mold rubber to make a mold (may make the lead bend since it’s flexible but easy to remove), a polyurethane mold rubber, or a protruder like the old fashioned way. Silicone mold rubber is expensive ($30+). I originally thought of it as a craft, but it’s too complicated for a craft. Thank you for your time!

Posted by TrixiaL 11 months ago

Bricks by the Bay

Howdy all, The first-ever LEGO/brick convention for northern California will be held on April 9-11, 2010, at the Fremont Marriott Silicon Valley in Fremont, CA. Planning is going on right now!  Please see for more information! Thought to share Richard

Posted by ftking_83702 8 years ago

Any suggestions on non slip natural material to put on my dogs paws

I'm looking for some suggestions to help my dog who is recovering from disc surgery. I've tried all the usual boots,socks,balloons etc. It is short of a nightmare watching him tread so carefully on slippery floorboards.I'm convinced he's lost muscle mass from not being able to walk normally anymore. Short of covering all my floors in rubber mats, I know there has to be a solution. I'm after something that is non toxic that I can rub on his paws. It has to have a tacky know like those silicone dots you can buy to stop slipping. Materials like those used in surfboard wax ..I've checked out the feel of surfboard wax and it feels ok but it feels like it's lacking the tacky element. The other thought I had was to buy a mould kit and get an imprint of his paws and make a slip on foot cover in a silicone. I'm not too sure what type of silicone to use for this..would it be like a latex that would be good to grip the floorboards? Any suggestions on what materials to use? Thanks

Posted by Lemonpoppyseed 2 years ago

Is it safe to use a microwave for small aluminum melts?

Seeing as how I have a spare microwave, and I've heard of people doing melts in a household microwave, I though that I'd try it myself.What do I need to add so that I don't destroy the microwave?"From a hardware store on Fourth Street, I bought a silicon carbide sharpening stone and 3 pounds of tin/silver plumber's solder; from Macy's, I purchased a microwave-safe casserole dish and a stainless-steel measuring cup; and at Williams-Sonoma, I found a cute cast-iron cornbread fish mold and a pair of long-cuff leather grilling gloves. " - PopSci's Theo GrayA good source of silicon carbide? A better material? (I don't even understand its purpose here).

Posted by carbon 11 years ago

Adhesive/fill material needed

I need an adhesive or fill material with some special properties. It should be a moderately viscous liquid that sets up into something very flexible, jellylike would be ideal. It should be applicable in very small quantities. It should flow before curing and be self leveling unlike silicone adhesive. Tensile strength is relatively unimportant. It should not adhere to two part tin based casting silicone. An analogy that comes to mind is E6000 adhesive but it's viscosity is a bit too low and it sets up way too hard. UV cured resin like Loon UV Knot Sense (great stuff that I learned about here) comes close and has the right viscosity also but also cures too hard. If you know of anything, I've got a project on hold until I find something and would greatly appreciate advice.

Posted by dgateley 4 years ago

3D Soft PVC Label, Supplies?? "rubber/silicon labels, patches, key chain etc"

Does any one here know what , how ,where I can find the supplies to make "Soft PVC Labels" like these:;_ylt=A0oG7jhPAzpRoHgAZWFXNyoA?p=Soft+PVC+Labels&fr;=yfp-t-621&fr2;=piv-web I have found several manufactures for finished products and production machines (mostly asia) but no information on the material used or sources to find it... I would prefer some where in the U.S. if possible, I don't need a lot so it would not make sense to ship from overseas. Mostly I just want to experiment with the process. Any help would be awesome!

Posted by tjolley2000 5 years ago

cheap easy pyro detonators!!!!!

Get some silicon diodes 3 for a 1.99 at radio shack or cheaper online tape one to a match and ad 6 to 12 volts to it and after a few seconds it will overload and get real hot! then it with ignite the match which will then ignite the visco fuse. original idea from jolly roger creator of anarchist's cookbook

Posted by struckbyanarrow 10 years ago

Find or How to Replace Old Dried Out Gaskets in a Set of 4 Ceramic Kitchen Canisters

We have a set of 4 ceramic kitchen canisters that are so old the foam seals, or gaskets, have dried out. I cannot find replacement gaskets anywhere. They were made by an individual, so there is no company to write to for replacement parts. Does anyone know who sells such gaskets? Foam or rubber or silicon will work.Or, is there a way of making replacements? I've seen amazing things done on "instructables" with silicon; molds, fake heads, toy octopus, etc. But I have never worked with it. Is it OK for a seal that will be in close proximity with salt, sugar, flour?The canisters are glazed ceramics that some individual has made.Attached are photos of the canister, mating surfaces, and existing gasket.Any suggestions will be appreciated.Thank you.Phil Brown, Southwest Wisconsin

Posted by oghk2000 6 days ago

Grippy stuff for sports clothes

Hi hi, i have an old pair of cyclist's leg warmers. they have lost some of their elastic action, and they fall down almost straight away. I went and bought some new elastic to sew onto them, but also wanted to stick some gripper stuff on the inside. The gripper stuff is found on most knicks and cycle shorts now; it's some sort of silicone or rubber that grips to your leg. I don't know what exactly it is, so didn't want to go out to the hardware store and just buy some tube of silicone, only to find out it irritates the hell out of my skin or just doesn't do the job. I tried a (big) sewing supplies store, but they had no idea what it could be. Can anyone help? I'm in Australia. I saw that in the states you can buy elastic with the gripper already on it, which is a bit of a pain. The gripper stuff is used by skiers and canoeists too... Cheers, Ben

Posted by bluenevus 10 years ago

How to remodel this into a dog boot?

I'm trying to make my dog some boots. I've found the perfect material that I would like to's a soft silicone.. I'd like to use this that is pictured...but of course if anyone knows where I can buy this material to make to measure I'd really appreciate it. Or ideas on how to cut/ mold or reshape this into a boot for my dog?

Posted by Lemonpoppyseed 2 years ago

Just a THANK You and a picture

I just want to say a BIG thank you to all who answered my two questions about wire (for a soap cutter), and about making a silicone mold (for my soap) I wanted to show you a picture of some of the soap I make. This is NOT "fishing" for compliments, or to sell anything. I just wanted to give you an idea of what I do really no need to even comment

Posted by MaryT8M 6 years ago

How might I go about building something like this? Ideas?

I found this on a website but it's a bit pricey for me. I'd love to make one for my girlfriend but I have no idea where to start. The design seems simple enough but there are parts that puzzle me, like the charging and wiring. Any help would be greatly appreciated.Rei HuggableFrom the site:We have wrote about this glowing pillow a loooong time ago, but now it's finally out of production and in the market and we are so happy to present it to you. What it is? Well for starters it's a soft and fuzzy pillow filled with 'silicone bean bags' that contain high intensity LED lights.These LED lights in the silicone beads make the entire pillow glow in an extremely calming and soothing way. Powered by 4 AA batteries – or if you prefer to hook it up to the adaptor, that's possible as well – the pillow glows strongly for about 4 hours and then the lights ever so softly fade over the next couple hours.

Posted by Avarice 10 years ago

Diffusing led strip

I'm making my girlfriend's Christmas present. and part of it is using amber led strips wrapped around an oval to cast light out behind the object. What would be the best way to diffuse the leds to make a nice even light. I was thinking about embedding them in a slight groove, and then covering them with silicone caulk. Would that block too much light? what else could i put on top to diffuse them?

Posted by frdmrckr 4 years ago

Non Polyester Clear Casting Resin

Hi I am interested in using silicon molds for jewelry and other "craft" projects. From reading your site, I learned that this could be done w/o worrying about the resin sticking to the mold if you use a non polyester clear casting resin. Since I am new to this whole arena, I wanted to know where I could purchase such a product. Thank you. MGW

Posted by mgw 10 years ago