When a composite part needs to be reproduced numerous times, it is efficient to build a mold from which the part can be reproduced. Properly molded composite parts emerge perfectly shaped every time and require little post-finishing work. Molds are commonly made of polyester resin with a variety of reinforcements. For a quick, simple mold for one-time use, casting urethanes are an inexpensive and reliable option.

Male and female molds are the two fundamental types of forms, but they yield significantly different parts. Male (or positive) molds are generally less time consuming and less costly to create in comparison to female (or cavity) molds. However female molds offer numerous advantages for medium to large production runs.

For an in-depth description of the steps necessary to create accurate, high-quality, low-distortion molds for producing composite parts, please read the Mold Construction article in our Learning Center. Shop our favorite selection of fiberglass reinforcements, casting urethanes, epoxy and polyester resins, and tooling gel coats!

  • Release Wedges

    Safe, Reliable Tools for Mold Release
    5 star rating
    Fabricators use plastic release wedges to help remove medium-to-large parts from a mold. Wedges are inserted around...
  • Air Injected Wedge

    Use Air to Carefully Separate Stubborn Parts
    Experienced fabricators will likely run across that hard-to-separate part, whether it's larger in nature or just...
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  • Plastic Rollers

    Eliminate Air on Flat Surfaces and Gradual Curves
    5 star rating
    These Plastic Rollers are straight across the width of the head and provide excellent air relief for nearly all...
  • Aluminum Rollers with Plastic Handles

    Designed to Eliminate Air from Lightweight Fabrics
    These Aluminum Rollers are durable and just right for releasing air from lightweight fabrics. Both sizes... 
  • Aluminum Rollers with Wood Handles

    Remove Air from Sturdier Fabrics and Laminations
    5 star rating
    Aluminum Rollers are perfect for laminations where increased pressure is necessary to release air bubbles. They are...
  • Aluminum Slotted Paddle Roller

    Get More Air Release in Hard-to-Reach Spaces
    This specialty roller is ideal for laminations that require added pressure to eliminate deeper air bubbles....
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  • Bristle Roller

    Stiff, Flexible Bristles Work Out Trapped Air
    The bristles on this unique roller are stiff, but flexible, to help release air trapped in irregular surfaces. They...
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  • Barrel Rollers

    Countoured Head for Small, Tight Areas
    These rollers feature a barrel-shaped head that is wider in diameter at the center and slightly tapered to both...
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