Sacrificial Mold Release Agents


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McLube’s line of sacrificial (conventional) mold release agents are ideal for flow promotion and touchup in deep draws, small sprue openings, threads, and undercuts where semi-permanents may be less effective. Our sacrificial coatings may also be the best choice for molds that experience undue buildup or for processes that cannot support the lengthy cure cycles of semi-permanent coatings. McLube® sacrificial mold release agents will provide several releases per application in higher concentrates or apply-every-cycle release characteristics when diluted. McLube’s line of sacrificial mold release agents includes water and solvent-based formulas as well as silicone-free options. Continue reading for more information about McLube’s sacrificial release agents, or contact us for expert technical assistance and samples.

Details & Benefits


  • Excellent flow and slip characteristics
  • Custom slip coefficients to suit individual process requirements
  • Ideal for spray application in difficult-to-reach areas
  • Extend the lifespan of permanent, in-mold coatings
  • Frequent application gives more control over each pull
  • General-purpose release useful around the entire plant
  • Condition mold surface over time for rust and corrosion protection
  • Silicone-free options


Supported Materials

McLube® offers sacrificial mold release agents for all natural and synthetic rubber compounds as well as specialized conventional coatings for complex polyurethane molding geometries where traditional wax-based release agents may not provide adequate release. McLube also offers sacrificial mat release coatings for the wood-fiber press industry.


Why Use A Sacrificial Coating?

Sacrificial mold release agents are generally non-functional, non-reactive coatings that create a physical barrier between the mold and material that is transferred to and removed with the molded part. Sacrificial release agents are designed for frequent application and generally offer limited releases per application. Since the advent of semi-permanent coatings, sacrificial release agents have also been referred to as “conventional” coatings. Semi-permanent release coatings have largely replaced conventional, sacrificial mold release because they offer multiple releases per application with little transfer to the molded part. While based on antiquated technology, sacrificial mold release agents are still the best choice for some molding applications.

Molders may opt for a sacrificial coating when their material is simply too tacky to release without a more robust physical barrier between the substrate and material. Sacrificial coatings can also be used for touchup in difficult areas of a complex mold. Some molders may want a shinier surface finish created when sacrificial coatings transfer to the molded part. Transfer of high-slip sacrificial coatings will also pass on a certain degree of slip to the surface of the part which can aid assembly/insertion by end users in the automotive and aerospace industries. Some processes may also require a sacrificial release coating when sufficient time and effort cannot be allocated to cure a semi-permanent. Water-based sacrificial coatings can also be diluted inhouse to create varying degrees of slip to suit different stages of a complex process.

If you are applying a semi-permanent release agent more than four times in an hour, then you may want to try a dilute conventional mold release to reduce buildup and cut costs. Contact McLube® and an experienced technical representative will help you select the ideal mold release agent for your operation.



Semi-permanent release technology was developed with functioning, crosslinking additives to increase the durability of the release coating and allow for multiple releases per application. Unfortunately, semi-permanent release agents do not possess the flow characteristics to reach deep drawls, cavities, threads, small sprue openings, and other difficult-to-release areas of complex substrates. This shortcoming is especially evident in semi-permanent wax coatings used in the polyurethane industry. Sacrificial release coatings, while based on older release technology, by their nature possess excellent flow characteristics and are the ideal choice for touchup in difficult areas. McLube’s line of conventional release coatings may be wiped or sprayed directly over a semi-permanent coating before each cycle for easy touchup.

Custom Slip Coefficients

McLube® Technical Representatives and Formulation Chemists will work with your production staff to formulate a tailored conventional release agent with the optimal degree of slip and flow characteristics for your operation.

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.

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