Composite Release Agents

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McLube offers a diverse line of mold release agents for synthetic composites, engineered wood, and engineered stone. McLube’s consummate line of mold release agents for synthetic composites includes many different product options all designed to enhance flow during curing steps, reduce transfer to the molded part, and promote excellent surface finish. Reduced transfer will improve part appearance and cut down on prep time for painting and gluing (if applicable). All McLube composite release agents contain proprietary rust-inhibiting additives to extend the lifespan of molds and tooling. Our products for composite release are thermally stable to 1,000°F and furnish chemically inert coatings that will not interfere with material integration. McLube’s line of synthetic mold release agents includes water and solvent-based conventional and sacrificial mold release coatings. We also offer tin-free and VOC-free options for molding a variety of composite materials. Continue reading for general information about our proven composite mold release agents or contact McLube for free samples and specific product information.

Benefits of McLube


Mold Release Agents


for Composites

Multiple releases per application

Reduced buildup on molds and tooling

Improved efficiency of your molding operation

Promote excellent surface finish

No interference with material integration

Extend the lifespan of molds and tooling

McLube Options for Composite Molders 

Supported Materials

  • Fiber-reinforced Plastics (FRP)
  • -Fibers: CRP, fiberglass, metals, boron, cellulose, hardwood, softwood, and ceramic

    -Matrix: nylon, polyethylene, polystyrene, polyamides, polypropylene, pMDI, Epoxy, Silicone, phenol, polyester, aromatic, polyamide and formaldehyde-based resins

  • Graphite
  • Borosilicate glass matrices
  • Biodegradable matrices
  • Laminar Composites & sandwich structures: metal-polymer, vinyl-metal, etc.
  • Metal Matrices: silicon carbide fiber, titanium, aluminum, magnesium
  • Ceramic Matrices: syntactic foam, dental composites, Cermet (ceramic-metal)

Supported Processes

Fiberglass spray lay-up, filament winding, vacuum bag molding, pressure bag molding, RTM (resin-transfer molding), lamination, hand lay-up, molding pre-press preforms, slip-casting, extrusion, pultrusion, forged composites, potting,  Lanxide process (pressure-less metal infiltration), sheet and bulk molded compound.


Supported tooling materials: Invar, steel, aluminum, silicone rubber, nickel, carbon-fiber, ceramic, magnesium

Reduce Scrap Rates and Improve Surface Finish

Our composite release agents are designed to provide reliable release characteristics without building up on the mold surface. Reduced buildup will cut down on cleaning time and frequency as well as reduce rejection rates due to poor surface finish or failed release. McLube offers composite release agents for the following surface finishes:


  • Glossy
  • Matte
  • Satin

McLube Formulation Chemists may also engineer a new formula for unique surface finishes.

Availability and Application Methods

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


Wipe, brush, spray, dip, or apply by atomizing spray gun. Consult your McLube Technical Representative for tailored application instructions and other cost-saving process assistance.

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

External Resources: Composites World Magazine