Semi-permanent Mold Release Agents


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Many molders are still using high-volume, apply-every-cycle release coatings because they are wary of changing their process or haven’t had much trial success with semi-permanent release agents poorly suited to their operation.

Whether you are hesitant to change your process or haven’t yet found a semi-permanent that adds value to your operation, our experienced Technical Representatives can help you select the optimal McLube® semi-permanent release for your needs as well as guide your engineers and operators through the transition. Our goal is to provide you with a semi-permanent release agent that is easy for your operators to control, requires no additional equipment, and achieves all of your process goals and more.

Every product in McLube’s diverse line of semi-permanent release agents is designed to furnish a thin, durable releasing film and achieve optimal adhesion to the substrate. Regardless of process conditions or materials involved, these two essential characteristics are crucial to maximizing releases per application and producing more aesthetically pleasing parts per shift without transfer or excessive buildup. Our line of semi-permanent release agents includes water and solvent-based options of various types and chemistries, including silicone-free options, concentrates, and heat-cured coatings in bulk or aerosol form.

While some processes are not suitable for semi-permanent coatings, many others can eliminate hassle, cut costs, and improve overall efficiency by switching to one of McLube’s durable semi-permanent release agents. Contact us today for samples or continue reading for more information about our semi-permanent mold release technology.

Details & Benefits


Our Semi-permanent Release Technology

Every product in McLube’s diverse line of semi-permanent release agents is engineered around two essential characteristics: 1) furnishing a thin, uniform releasing film and 2) achieving optimal adhesion to the substrate. Regardless of the process or materials involved, these two essential characteristics are crucial to maximizing releases per application, reducing transfer, limiting buildup, and producing more aesthetically pleasing parts per shift.

Excellent surface adhesion ensures the coating remains in place to release the next part and also reduces or eliminates transfer during demolding. Sacrificial coatings provide limited releases per application because they are inactive coatings, they do not crosslink or bond to the substrate. Our active semi-permanent release agents will crosslink to themselves and bond with the substrate for unparalleled coating durability that leads to the maximum number of releases per application. Excellent adherence to the substrate also prevents transfer to the part during demolding for more aesthetically pleasing parts and no interference with post-finishing steps.

Thickness of the release film determines the amount of in-mold buildup that occurs over time. A certain degree of in-mold buildup is unavoidable when using semi-permanent coatings because they do not transfer to the part during demolding like sacrificial coatings. McLube® semi-permanent release agents furnish so thin a releasing film that buildup is negligible even after multiple reapplications. Without excessive buildup, our customers are able to run their machines longer between stoppages for cleaning and increase their number of finished parts per shift. Proprietary cross-linking additives ensure that our micro-thin release films are nonetheless exceedingly durable, able to provide effortless pulls for the maximum number of releases per application.

Contact McLube® and one of our local Technical Reps will help you select the ideal semi-permanent release agent for your material and process.


  • Multiple releases per application without transfer to the part
  • Thin, releasing films that preserve mold details for better quality parts
  • No interference with post-finishing steps like painting, gluing, and bonding
  • Consistent release performance that reduces scrap and rejection rates
  • Limited in-mold buildup over time resulting in fewer stoppages and less cleaning
  • Produce more parts per shift to spread out fixed costs and improve efficiency
  • Lower application rates that reduce cost and make for a cleaner plant
  • Custom slip and release characteristics suited to your process and goals
  • Water-based and low-VOC options for a safer, “greener” working environment
  • Abrasion and rust prevention that extends the effective lifespan of equipment


Supported Processes

Compression molding, injection molding, transfer molding, and other specialty applications.

Supported Materials

Consult a local McLube® Technical Representative to find the ideal formula available for your needs. Featured products displayed on this page from time to time are for promotional purposes only and do not represent the full product line McLube® offers for this particular material or application. Product availability, including container sizes, concentrations, and aerosols, will vary by country or region. Names of certain products may also vary slightly (prefix, suffix, etc.) depending on your location without affecting performance.

McLube® Marine

Our Marine Division is the world’s leading manufacturer of high-performance dry lubricants (SAILKOTE®) and low-friction hull coatings for professional sailors, Olympians, and boating enthusiasts alike. We provide reliable dry lubricants for everything that slides and environmentally-conscious hull coatings with unparalleled anti-friction characteristics. Our ONE DROP® Ball Bearing Conditioner is the only product Harken® recommends for everything that rolls. Team McLube® partnered with Harken® in 1998 to provide top-quality coatings and polishes to sailors around the world.

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