Semi-Permanent Mold Release Agents

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Semi-permanent mold release agents offer an alternative to the conventional (sacrificial) mold release agents that require reapplication before every cycle. McLube’s full line of semi-permanent mold release agents includes durable, crosslinking formulation designed to reduce buildup and rejection rates while also allowing for multiple releases per application. Our line of semi-permanent release coatings includes dilutable or ready-to-use water and solvent-based options as well as silicone-free release for processes with sensitive post-finishing steps. McLube also offers reliable VOC-free mold release agents for a variety of applications. Continue reading for more information about our semi-permanent mold release agents or contact us for experienced processes assistance, safety data sheets, and free samples.

Benefits of McLube




Mold Release Agents

Multiple releases per application

Thin, even coatings that preserve mold details

Less cleaning and improved part appearance

Efficiency: more parts in fewer shifts

Protect mold surfaces from dust, rust, and corrosion

Supported Materials

We offer semi-permanent mold release for all natural and synthetic rubbers, plastic, urethane/ polyurethane, and composite materials. McLube also offers semi-permanent mold release agents and platen sealers for engineered wood products as well as dilutable concrete form, asphalt, and engineered stone release systems. Contact McLube for more information about our line of semi-permanent release agents and how they can improve your bottom line.

Multiple releases per application: How? 

Semi-permanent release agents allow molders to achieve multiple releases per application as a result of enhanced durability when compared to conventional (sacrificial) coatings. Most sacrificial coatings are non-functioning silicones, waxes, or oils that create a physical barrier between mold and material that is transferred to and removed with the molded part. Semi-permanent mold release agents are functional crosslinking polymers that chemically bond to themselves as well as the mold surface to create a physical barrier that transfers very little to the material; low transfer means the bonded coating stays behind after the pull to provide release for the next cycle. No semi-permanent mold release agent is entirely non-transferring. Semi-permanent mold releases will eventually wear off and require reapplication. The frequency of reapplication for a semi-permanent coating will vary by process, material, and application method. Many molders do not properly apply semi-permanent coatings, resulting in extra cleaning steps, reduced output, and increased costs. McLube Technical Representatives can assist you with selecting the best mold release for your operation as well as provide cost-saving application assistance. Contact McLube to learn more.

Improve output while reducing costs

  • More parts, more cycles per shift
  • Improved part appearance
  • Cleaner parts ready for post-finishing steps
  • Reduced buildup allowing for fewer cleaning steps
  • Durable coatings reduce scrap and rejection rates
  • Protect molds in storage for faster startup

Protect mold surfaces from harmful compounds

Some compounds, particularly sulfur-cured and peroxide-cured rubbers, are microscopically abrasive and corrosive over time. Damage to mold surfaces over time will result in continual worsening of part appearance, extra cleaning steps, and dramatically reduce the effective lifespan of your expensive machinery. McLube’s semi-permanent mold release agents form a bonded barrier that not only provides excellent release characteristics but also protects molds during operation. Our release agents may also be applied to molds in storage to prevent buildup of grime and rust.


US, Canada, South and Central America: 1G, 5G Pail, 55G Drum, 275G Tote, and aerosols

Europe: 5L, 20L, 200L, 220L, and aerosols

Asia, Middle East, Africa: 1L, 5L, 20L, 50L, 200L, and aerosols


McLube offers semi-permanent mold release agents for a variety of surface finishes, including:


  • Glossy
  • Matte
  • Satin

Contact us for specific product information, safety data, and free samples.

External resources: information about types of mold release agents