Hand Lay Up

Composiflex uses “Hand Lay Up” for two main processes: Pre-Preg/Autoclave and Wet Lay Up. The term “Lay Up” also refers to the combination of materials that are inserted into molds for Resin Infusion and Resin Transfer Molding.

“Lay Ups” are enginer-specified layers of advanced composite materials.


Pre-Preg composites (woven cloth or uni-directional fibers with pre-impregnated resin), core materials, and other materials. The materials are then combined in a Lay Up that is processed in a mold and typically a vacuum bag for the autoclave process. See the Autoclave Process details for more information on this process. See the Autoclave Process details for more information on this process. For less demanding applications, an oven can be used instead of an autoclave.

Wet Lay Up

Dry composite cloth is inserted in an open (one-sided) mold and liquid (wet) resin is applied. Part thickness can be built up with fabric and materials. This is normally an open mold process meaning the materials are exposed to open air during the process. Typically, room-temperature cure resins are used. Wet Lay Up is normally utilized in lower performance applications. Vacuum bagging and oven post-curing can be used with this process to produce higher performance parts

Typical Wet Lay Up Applications

Wet Lay Up composite applications include cowlings, covers, some aircraft components, and prototypes of several types of applications. Wet Lay Up can be used to manufacture large structures.

Carbon Fiber
Composite Cowling
 Wet Lay Up Advantages

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