• I see haze on the mold. What causes it and can I get rid of it?

    Haze On The Mold After Applying Release (before molding): This can be caused by reaction of the release with contaminants on... Read More »

  • What prep should I follow after buffing, sanding, or stripping the mold?

    Sanding, heavy buffing and stripping can open pores of a mold, allowing un-reacted styrene to bleed out of the mold during production. This can... Read More »

  • What mold prep should I follow after a fast patch? Sometimes I need to put the mold back in production within one hour.

    A lot depends upon the material you are using to patch the mold, how thoroughly the patch material cures, as well as the depth and overall size... Read More »

  • What should I do if raw (un-catalyzed) resin or gel coat over-spray gets on the mold?

    Gel Coat Over-Spray: Gel coat over-spray has been catalyzed. Even if the film over-sprayed on the mold is thin, it will... Read More »

  • I want to convert my molds to a semi-permanent mold release. Do I need to strip them first to do this?

    If you are evaluating any mold release, we suggest that you totally strip a test mold and prepare it according to the manufacturer's... Read More »


  • Composite Molding Challenges and Solutions

    Watch our Chemlease® RTM systems video to see how we meet the challenges of resin transfer molding with a comprehensive system of... Read More »

Case Study


  • Vacuum Bagging

    The vacuum bagging method of molding parts is commonly associated with “advanced composites,” as high strength fibers are most often... Read More »

  • Rigid Polyurethane

    Polyurethane rigid foam systems are used as an insulating foam material in construction (entry doors) and appliance (refrigerators, freezers,... Read More »

  • Resin Transfer Molding (RTM)

    Resin Transfer Molding (RTM) is a closed-mold process that holds many challenges. Dry reinforcement textiles are set in place before bringing... Read More »