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What Can I Use For Mold Release

Resin Mold Release: How To Use This Essential Tool

Using Smooth-On Universal Mold release!

If youre a hobbyist or a professional, working in resins and polymers enables you to do many amazing things. However, having access to a reliable resin mold release agent is essential.

What is resin mold release? Resin mold release is a chemical agent that helps release resin from metal and plastic molds. While many resins are designed to be easily removable from various metal molds, the resin that sticks can damage a mold or the actual resin product. Resin mold release is an essential tool if you work with resin and create your own products. Used correctly, resin mold release agents will enable you to separate your project pieces from your molds safely, ensuring that neither your molds nor your castings become damaged.

In this article, youll learn about resin mold release and how it can help you in your hobby and manufacturing work. No matter whether you make jewelry for fun, create artwork or miniatures for your Etsy store, or run a manufacturing business, well show you the technique of DIY resin mold release agents so that you can make your work easily and safely.

What Can I Use As A Mold Release

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A mixture of 2 parts isopropyl alcohol and 1 part dish soap can be used in some cases to release silicone from silicone. Petroleum jelly can be used to release silicone from silicone, but it should be thinned with mineral spirits so that it can be applied in a thin layer with minimal visible brush strokes.

Furthermore, do I need mold release? Silicone molds should not require a release agent. They should be wiped out with mild, soapy water after each use. Plastic molds usually need a release of some kind. I have found that a fine mist of Pam cooking spray works well.

Likewise, can I use wd40 as a mold release?

Is WD40 ok for silicone molds, as a mold release agent ? WD-40 contains strong acids in order to penetrate rust. While it might not affect your skin much more than drying it out, it’ll absolutely damage a mold. Its thin viscosity means it won’t adhere to the sides of molds.

What is in mold release?

A release agent is a chemical used to prevent other materials from bonding to surfaces. Release agents provide the critical barrier between a molding surface and the substrate, facilitating separation of the cured part from the mold.

Recommendation: Partall Pva Release Agent

The PVA release lacquer from Partall is the ideal epoxy resin release agent for wood, silicone and other materials. It offers the user a whole range of advantages:

  • It is not only suitable for epoxy and cast resin, but also for gel coat and top coat
  • Even cured polyester resins can be released from the mold
  • The release lacquer is extremely economical, as it is highly concentrated
  • The application is simple even for inexperienced craftsmen
  • A combination with release wax is possible
  • The release agent is suitable for the production of high-gloss surfaces

With this product we could not find a single disadvantage. It definitely keeps what the manufacturer promises: easy handling with high yield and perfect demoldability of the castings. The release lacquer from Partall is the perfect release agent for wood in combination with Epoxy Resin, but also for other types of Resin.

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Recommendation: Orca Shimmer Mold Release Wax

The Orca Shimmer Release Wax can also be used for all types of resin. It offers the user many advantages:

  • The Release Wax is easy to remove and also the application is really easy
  • It can be used not only as a release agent for epoxy resin, but also as a release agent for gelcoat and topcoat and for polyester resin
  • The wax is extremely productive due to its high concentration
  • The release agent for epoxy resin can be combined with PVA release lacquers, but these are not necessary if the release wax is well polished


  • The Orca Shimmer release wax is definitely somewhat more expensive than products of other well-known manufacturers however, this disadvantage is more than outweighed by the advantages
  • Release wax is not suitable for wood, as it is largely absorbed by porous surfaces, but this can be remedied by using a suitable release lacquer or sealant

Important when using the wax is the flash-off time. This should be observed to prevent the wax and resin from mixing. The resin should only be poured in when a tack-free film has formed in the mold.

Because of the easy use and the really enormous yield, we give Orca Shimmer release wax a crystal clear recommendation!

Tips And Tricks For Easy Demolding Of Castings

Stoner Urethane Mold Release 12 oz.

There is no royal road to release a casting from the mold. The method of release depends strongly on the size of the mold used and the design of the component.

Always loosen the edges of the casting first. Most components can be released from the mold by this alone simple components already slip out when you turn the mold over.

If the release does not succeed at the first attempt, you can help with demolding wedges. These plastic wedges are available in every well-positioned hardware store or via the Internet. They are also perfect for opening two-part molds.

If you have the possibility, you can blow compressed air between the mold and the cured component. If the casting still does not come loose, try tapping gently on the mold with a rubber mallet.

Which release agent for epoxy resin you use depends mainly on the mold into which you want to put the resin. For two-dimensional molds, we recommend a release wax, whereas for a detailed mold, you can rather use a release spray to save work. We hope that we have been able to give you a solid overview of the various epoxy resin release agents.

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Internal Mold Release Agent

IMR is a product that is dissolved in the resin mix, which is highly soluble in the carrier solvent such as styrene. During cure the product drops out of solution and migrates to the surface due to volumetric shrinkage, pressure and temperature. When selecting an IMR agent the following criteria should be considered:

Total solubility in the system

No negative influence on physical properties

No silicone, non-stearate, and no natural waxes which would adversely affect painting or bonding adhesives

A consistent clean release with no build-up

Measurable reduction in cycle time

IMRs are more commonly used with mechanized processes but can be used with highly detailed hand lay-up tooling. One major advantage is consistency since the external release systems rely solely on operator skill, not always meeting the requirements of the designer or formulating chemist. Some of the disadvantages it offers is

The need for a cleaning process if bonding or painting,

There is high defect rate

Often ineffective on its own need of external release agent

May decrease polymer performance

Examples of such a product are Wurtz PAT 651 and Marbocote 516FC. Fig. 6.1 shows result of applying internal release agent.

Figure 6.1. Illustration of the wetting of Marbocote W1151B release agent onto a carbon/epoxy tool .

In , 2014

Advantages And Disadvantages Of Additive Use

Mold-release agent contained in polymethylmethacrylate molding-compound granules can separate as fine droplets at the rims of mold parts of the mold apparatus, for example, after several hours of continuous operation of the equipment. When the mold is opened, the droplets can then get onto either the female die or the blank itself. Both are undesirable, especially during production of DVDs with extremely fine data structures, since they lead immediately to impairment of the female die or to scrap loss.24 This problem can be overcome by using polymethylmethacrylate molding-compound granules containing at most 0.05 wt% of mold-release agent.24

Zeaid Hasan, in, 2020

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Question: What Can I Use As A Release Agent For Silicone

A mixture of 2 parts isopropyl alcohol and 1 part dish soap can be used in some cases to release silicone from silicone. Petroleum jelly can be used to release silicone from silicone, but it should be thinned with mineral spirits so that it can be applied in a thin layer with minimal visible brush strokes.

Ptfe Dry Film Mold Release Agent

Mold Making Tips- Baby Powder as a mold release


Miller-Stephensons PTFE / Fluorpolymer mold release agent solutions utilize low-molecular weight and particle size fluoropolymers to achieve ultra-uniform dry, thin films that exhibit excellent surface adhesion and durability. Miller-Stephenson PTFE release agents contain no silicones, surfactants, or waxes and have a operating range up to 400°F / 205°C . These release agents generate a dry film on the mold surface, which is chemical inert, non-migrating and non-staining, the result? Consistent, reliable release that generates a 100% paintable, bondable surface with no messy transfer. Formulations for this class of mold release agent can be solvent or water-based and application is typically performed with dipping, brush or aerosolization. Once the carrier fluid is dried, the release coating is ready for operation, no additional cure time is needed. PTFE dry film release agents are particularly useful in rubber-to-metal bonding operations or when molding silicone or fluorosilicone polymers and elastomers. PTFE has exceptional utility and can be use in compression and transfer molding operations, however due to its relatively low slip, it can be ineffective with injection molding operations.

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Carving Press Molds Spring Molds

One way to use plaster is to carve your shape into it.

Pour plaster into plastic containers such as margarine tubs and cottage cheese containers, about 1-2 inches thick. Normally after the plaster has set it will release by itself, even without any mold release on the plastic. If you wait too long and the plaster sticks, you can always cut the plastic off. Now you can carve designs into the plaster, and use it for press molds. While carving, periodically take some clay and test your design by pushing the clay into the surface. Your clay will pick up the loose plaster particles and also allow you to see what the pattern you have carved looks like. Use the same clay a few times, then discard. You do not want to fire this clay, or mix it into your other clay, as plaster mixed in clay is likely to cause an explosion in the kiln.

These molds can now be used as press molds , and to make sprigs .

You can make a small press mold into a stamp for signing your work, or to impress into your piece and make designs. This works best if you want a raised design on your piece . If you want a recessed design, read the next section.

Stamps and sprigs are especially nice when used around a border, or across multiple pieces to achieve a repetitive design element.

What Are Mold Release Agents

A mold release agent is a chemical that prevents certain materials from adhering to each other. Not adding a release agent will cause these materials to bond, which then produces more problems in cleaning up and creating a perfect casting.

Do you use epoxy resin and molds regularly? You will then understand the need for an epoxy release agent. Always use an epoxy release agent in your molds, as you do not want your epoxy resin to stick to your mold. Not only do you use the resin mold release agent on small castings, but on larger projects as well. For example, embedding epoxy resin into the wood, or other types of materials.

If you do decide to do your own molds, whether its glass fiber mats or epoxy resin, remember to apply an appropriate mold release agent onto the negative mold form. However, if you do not use the release agent, the created mold wont be able to come free, and all your work would have been for nothing.

The epoxy release agent creates a barrier between the mold and the resin, preventing the resin from sticking to the mold. If the resin does stick, it will damage the mold and more than likely you will not be able to use the mold again.

Epoxy release agents can be used for:

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What Can You Use As Form Release

Castor oil, or petroleum jelly thinned with kerosene, also are good release agents. Concrete forms, even if they are ground, smoothed and polished, require a release agent to prevent sticking and enable easy stripping. Light colored petroleum oils or oil emulsions or various types have been used successfully.

What Will Cement Not Stick To

Resin mold release

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Water-Based Barrier Agents. Water-based release agents can also keep concrete from sticking to wood forms, and unlike oil-based formulas, they do so without releasing high levels of volatile organic compounds into the air.

Also, does concrete stick to wax paper? Almost any non-pourous work surface is fine. I use wax paper, glass, Teflon sheet, Faux Bone, sheet plastic, Plexiglas, etc. The concrete will take on the finish of the surface against which it sets.

People also ask, what to use to keep concrete from sticking to forms?

Any type of oil will prevent concrete from sticking to wood. Spray the surfaces that will face the wet concrete with a heavy saturation of oil. Allow the oil to penetrate the wood for 15 to 20 minutes. Apply a second heavy spraying of oil just before pouring concrete.

Does cement stick to PVC?

It even bonds with plastic, wood, concrete, metal and glass. Sticking PVC with regular adhesives is usually close to impossible because they are unable to adhere to the material.

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Best Mold Release Wax For Professionals

Release wax is a chemical agent used to stop the bonding of the molding material with the mold. Mold release wax, in particular, is used in casting and prevents the part from attaching to the surface of the mold. In this article, we will cover some of the best mold release agents you can buy off the market today.

Best All Purpose Mold Release

Home PageForumsMolds and moldmakingBest All Purpose Mold Release

  • September 8, 2018 at 4:22 pm#15457Betsy KristlGuest

    Im looking forward to trying some resin projects Ive had in mind for years now and want to be sure I have everything I need before I start. I will be trying different things for molds and would love to learn that there is a single mold release that works well for both epoxy and polyester resin in silicone and plastic molds . I want to use the best products possible, but since Ill be doing a lot of experimenting, cost is an issue. Ideas?

  • September 8, 2018 at 4:53 pm#15461

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Tips And Tricks For Demolding Your Casting

  • The size of the mold you use and its overall designwill dictate the most suitable method for releasing the casting component from the mold. If you are using a two-dimensional mold, we suggest you use a release wax. If you are using a finely detailed mold, you should choose to work with a release spray.
  • You can remove most components from their mold with ease simply by loosening the edges of the casting first. In fact, some items that have been made in a simple mold will pop out just by turning the mold over.
  • If you arent able to release the item with your first attempt, you can assist the removal using demolding wedges. Demolding wedges are plastic wedges that you can purchase them from most hardware stores or online. They can be used to remove the component when you are working with a two-part mold.
  • You can also try blowing compressed air between the cured component and the mold. If you still cannot get the casting loose, you can try tapping gently on the mold with a rubber mallet.

Epoxy Mold Release How To Use Resin Mold Release Agents


You can use your imagination when dealing with epoxy resin, create any shape you can think of. You can even make shapes and molds of your own, there is no limit to what you can do. The problem comes when you have to release your cured resin from the mold. For this, in many cases, you will need a resin mold release agent. Read on to find out more about the pros and cons of mold release agents and the various ways in which you can use it, especially for use on silicone molds.

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Substitutes You Can Use In Place Of Commercial Mold Release Agents

Petroleum Jelly

Petroleum jelly is best used on plain molds that do not have delicate details. You can easily apply a thin layer to your mold by hand. If you do apply on more detailed molds, the jelly might cover up the finer details, which will then affect the final result.

Mineral or Vegetable Oil

Both these oils make a good mold release agent and can easily be applied with paper toweling. Be careful not to add too much oil, as it could pool. This can be remedied by using the paper towel, which will absorb any access oil.

Spray and Cook

Commonly used when cooking to keep food from sticking to a pan or other cookware. Easily available, spray and cook is a non-stick spray which is excellent to use as a mold release agent. The non-toxic spray will not damage your mold or the resin. Simply remove any residue from your final resin item with a clean cloth.

Talcum Powder

Talcum powder works great as a silicone mold release agent, but on molds that have fewer details. For example, a half-sphere mold or gem-shaped mold. Talcum powder does not work with solid or hard molds or molds with more details. This is because the powder does not cover the mold properly, so it wont prevent the resin from sticking to these areas.

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