{"id":6830,"date":"2020-07-20T20:37:08","date_gmt":"2020-07-20T20:37:08","guid":{"rendered":"https:\/\/resin-expert.com\/?p=6830"},"modified":"2024-06-04T11:25:42","modified_gmt":"2024-06-04T11:25:42","slug":"mold-release","status":"publish","type":"post","link":"https:\/\/resin-expert.com\/en\/guide\/mold-release","title":{"rendered":"Mold Release Guide – The best Epoxy Release Agent"},"content":{"rendered":"

Epoxy resin allows both artists and do-it-yourselfers to create any shape they wish. Especially if you want to use self-made forms, there are no limits to your imagination. But to be able to release the hardened epoxy resin, the casting, well from the mold, a release agent is needed. We describe the advantages and disadvantages as well as the areas of application of the various epoxy resin release agents and how best to use them to grease your silicone mold.<\/strong><\/p>\n

 <\/p>\n\n

 <\/p>\n

 <\/p>\n

What are release agents for epoxy resin needed for?<\/h2>\n

Release agents are generally understood to be substances that prevent different materials or articles from sticking or sticking together.<\/p>\n

If you use epoxy resin<\/a><\/strong> to cast everyday and art objects, you need not only the resin, the hardener and the appropriate mold, but in any case also a release agent. You should always grease the silicone mold<\/a><\/strong> you use. This prevents the hardening epoxy resin from sticking<\/a> to the mold. This applies not only to smaller castings, but also to furniture where epoxy resin is embedded or worked into other materials, such as wood.<\/p>\n

When making molds using epoxy resin<\/strong><\/a> and glass fibre mats, it is also important to process the negative mold beforehand with a suitable release agent for epoxy, otherwise the resulting mold cannot be released and all the effort was in vain.<\/p>\n

For this purpose the mold must be completely lined with the epoxy resin release agent; there must be no contact between the resin and the mold. If the resin adheres to the mold during the curing process, the mold is damaged and the casting is usually not usable.<\/p>\n

As a rule, release agents for epoxy resin are also suitable for polyester resin<\/a><\/strong>, sometimes also for polyurethane resin.<\/p>\n

It should be noted that there is basically no ideal epoxy resin release agent for wood, as this is a porous, i.e. absorbent, substrate. Such surfaces must be sealed before treatment with release agent, otherwise the release agent will be almost completely absorbed. Such materials include wood, plaster and foam. So when we talk about a good epoxy resin release agent for wood in the following section of our guide, we assume that the wood is sealed.<\/p>\n

 <\/p>\n

\"mold<\/p>\n

 <\/p>\n

 <\/p>\n

Release Spray<\/h2>\n

If you want to use a release agent for epoxy resin casting, you can choose between a release spray or a release wax. Your choice depends on the type of application. A release spray for epoxy resin is best suited for very small and detailed molds, as it can be sprayed on and does not have to be rubbed in like a release wax.<\/p>\n

The spray works via a combination of wax and aerosols. The latter act as carrier material and apply the protective wax layer to the mold. While the wax layer remains on the mold, the aerosols evaporate within a short time.<\/p>\n

 <\/p>\n

Fields of application<\/h3>\n

A release spray is particularly suitable for molds with many smaller edges and corners, because the spraying process distributes the release agent optimally everywhere. If you want to achieve a particularly even surface when casting epoxy resin with the release agent, you can polish the spray afterwards; however, this is not a must.<\/p>\n

 <\/p>\n

Application<\/h3>\n

First of all, the substrate must be completely cleaned of all grease, oil and dirt residues. This applies not only to release sprays, but also to release waxes and PVA release lacquers. Especially oil and grease prevent the adhesion of the release agent; it virtually floats on a kind of oil slick and thus cannot develop its properties. After curing, the casting material does stick to the mold and the mold and casting can be damaged.<\/p>\n

After thorough cleaning, shake the can well with the release spray. Now spray the mold as thinly as possible with the release spray. Take care to cover all angles of the mold and keep a distance of 20 to 30 cm from the mold when spraying. Wait two to three minutes. Now polish the release film with a lint-free, soft cloth if necessary.<\/p>\n

New forms should be treated in this way several times, preferably three times. After each spraying, allow the mold to flash off overnight.<\/p>\n

 <\/p>\n

Recommendation: Stoner mold Release Spray
\n<\/strong><\/h3>\n

The Stoner Release Spray with Wax is a mold release agent for various applications and materials. It facilitates the removal of the casting and offers the user an easy and pleasant handling. The Stoner Release spray also has other advantages:<\/p>\n

 <\/p>\n

\n

Advantages<\/strong><\/span><\/p>\n

 <\/p>\n

\n
    \n
  • <\/i> It has an optimum release effect and ensures perfect demolding<\/li>\n
  • <\/i> It is easy to use even for untrained craftsmen<\/li>\n
  • <\/i> The release spray is free of any greenhouse gases and silicone<\/li>\n
  • <\/i> It can be used for cast resin, polyurethane, PMMA and polyester resin<\/li>\n
  • <\/i> It can be used for large areas as well as for small and detailed shapes<\/li>\n
  • <\/i> It is particularly suitable for porous molds and is therefore the optimal epoxy resin release agent for wood; for this purpose the release spray should be applied in several layers<\/li>\n<\/ul>\n<\/div>\n<\/div><\/div>
    \n

    Disadvantages<\/strong><\/span><\/p>\n

     <\/p>\n

    \n
      \n
    • <\/i> The Stoner release spray is not suitable for separating silicone on silicone<\/li>\n<\/ul>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>\n

      From us there is a clear recommendation for the Stoner Release spray, as it offers the user in principle all the positive properties required to release a casting from epoxy resin. For the separation of silicone, a release wax or a release petroleum jelly can be used.<\/strong><\/span><\/p><\/blockquote>\n