If you have ever used epoxy resin on a mold, then you know how difficult it can be to remove. Epoxy is great because it sticks to the surface of the mold and doesn’t drip off like other types of glue or adhesive.
However, if you are working with metal molds that have intricate shapes, then getting epoxy out of them becomes very tricky.
This article will provide some tips for removing epoxy from your molds so they are ready for use again!
Why Is My Resin Stuck In The Mold
This happens when the resin shrinks as it cures. The shrinkage is different depending on which type of resin you use, so there’s no way to prevent this from happening all the time.
As long as your mold was thoroughly cleaned before pouring in resin, then most likely that’s what happened to your part.
Table of Contents
- Why Is My Resin Stuck In The Mold
- How Do You Get Resin Out Of Long Mold
- How Do You Keep Resin From Sticking To The Mold
- How Do You Get Resin Out Of A Plastic Mold
- When Can I Take My Resin Out Of The Mold
- Can I Use Wd40 As A Mold Release
- Do You Have To Use Mold Release For Resin
- How Do You Clean Silicone Molds After Using Resin
- Will Vaseline Keep Epoxy From Sticking
- Does Resin Stick To Saran Wrap
- Can I Use Clay As A Mold For Resin
- How To Get Sticky Resin Out Of Mold
How Do You Get Resin Out Of Long Mold
If you have a long, narrow mold that is difficult to clean, put the resin into it before it starts to harden.
If possible, use an old kitchen strainer or colander that has lots of tiny holes in its bottom since these will help keep the resin from reaching your mold’s opening and getting stuck there.
Once finished with your project, let the resin dry completely so that no liquid remains inside. Now place something heavy enough on top of your molded epoxy for at least 24 hours (or until fully dried).
Finally, remove all remaining hardened pieces by tapping them lightly against another surface like pavement or concrete flooring, if necessary repeat this step several times until no more small particles remain in your mold.
Afterward, wipe down the mold with a damp cloth to get rid of any dirt so the epoxy will have a clean surface for its next use.
How Do You Keep Resin From Sticking To The Mold
- Don’t use too much resin
- Use a mold release agent on the mold prior to pouring in your epoxy. You can get it at most hardware stores or online for cheap!
How Do You Get Resin Out Of A Plastic Mold
The easy answer is to buy a new mold, but if you want to recycle or repurpose the old one there are some simple steps that can help.
- First, you need to clean the mold out.
- Then put it in an area where resin won’t stick again.
- If it is really stuck, adding a little bit of dish soap can help dissolve some of that excess resin and make for easier cleaning.
- if the epoxy is too thin to peel off, you can add a thicker agent like sand or cat litter and let it dry. Then turn your mold over so that the layer of sand sticks to the resin on the other side and use an old credit card to scrape across both sides at once.
- Be careful not to cut yourself! It’s also best if you wear protective gloves for this step in case something does get stuck under your fingernails.
When Can I Take My Resin Out Of The Mold
After the epoxy resin has cured, you can take it out of your mold. You should plan to wait overnight before removing it from a small or thin object like a spoon.
Otherwise, the piece might crack as you remove it.
Can I Use Wd40 As A Mold Release
No, WD-40 will not work as a mold release when working with epoxy resin.
WD-40 is formulated to be used on metal surfaces and the thick oils within the formula would prevent the epoxy from curing properly. It’s great for lubricating tools but not ideal for use in this situation.
Do You Have To Use Mold Release For Resin
That depends on the type of epoxy resin you are using. Some types require it, while others do not.
How Do You Clean Silicone Molds After Using Resin
Cleaning silicone molds after using resin can be a little tricky. Unlike epoxy, which is very difficult to remove from the mold once it has dried and cured, you should not have that problem with silicones. You just need to follow some simple steps:
First of all, let’s talk about what you will need for this job we recommend having paper towels handy as well as white vinegar and alcohol on hand.
This may sound like an unusual combination but they really do work best together when trying to clean silicone rubber molds without damaging them in any way!
Now also make sure there are no bits of liquid or sticky residue left anywhere inside your mold before starting out, if so wipe those spots away with a paper towel and soapy water to ensure everything is nice and clean.
Once you have completed this step it’s time to add the vinegar solution, which will be 50 percent white distilled vinegar mixed with an equal amount of alcohol (or other solvents).
The reason for using such an unusual combination here relates back to epoxy resin; when combined together these two substances create acetic acid that can dissolve cured epoxies.
However, since silicone rubber does not contain any form of an acidic ingredient like silica gel or talc it should come away from your mold without leaving behind any damage whatsoever!
You may want to try out the mixture in one small area first before committing fully; we recommend pouring some solvent into your mold and then waiting a few minutes before pouring out any excess liquid.
You can use paper towels to soak up this solution if necessary, or you could also add more of the mixture depending on how much is required for each small section until everything has been treated in some way.
Now let’s talk about what should happen next once you have poured out all of your solvents we recommend leaving your mold alone overnight so that it can air dry naturally without requiring any kind of heat source such as a hairdryer (which would be very bad news indeed).
Once left alone overnight there should hopefully be no sign remaining at all, but if still stuck afterward run through these same steps again with either fresh vinegar/alcohol mix or even straight vinegar (but not alcohol) to ensure the epoxy is completely removed.
Once you have successfully cleaned your silicone mold it can be placed back in use if required, but try leaving them out of direct sunlight for a few days so that they don’t dry out too quickly.
If this does happen moisture will leave behind tiny bubbles on the surface which are very difficult to remove without causing damage!
Will Vaseline Keep Epoxy From Sticking
Epoxy resin will stick to anything. So, Vaseline might work for you depending on the type of mold and epoxy resin being used.
Does Resin Stick To Saran Wrap
Saran wrap will not work, since that is made of polyethylene which can melt. It might be able to help if you were trying to remove the hardened color/resin from a mold in general (and especially when combined with heat), but it won’t clean anything between two pieces of glass.
If resin gets stuck between the two, it will likely create a permanent bond between them.
Can I Use Clay As A Mold For Resin
It is not recommended to use clay for a mold when working with epoxy resin. It’s too porous and the surface finish will show lines from where it was removed from its original shape, so you may have issues getting your final product looking clean and professional.
How To Get Sticky Resin Out Of Mold
There are several methods that can be used to remove epoxy resin from a mold.
The method you choose will depend on the type of material and how much residue is left over after removal. Some options include:
using acetone, turpentine, or methyl hydrate; grinding out leftover bits with an electrical sander, or soaking in water.