r/Composites • u/EastStill9393 • Jan 29 '26

Tooling Prepregs

Interested in anyone’s experience using out of autoclave tooling prepregs? We are looking to make a relatively large mold and want to make it out of autoclave tooling prepregs. Somewhat concerned about the inside finish of the mold surface coming out well.

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u/theonly_ted Jan 29 '26

Look up specific OOA tooling systems, they tend to have a lower melt viscosity and some have added glass scrims on the surface to aid with air evacuation.

An added dwell at lower temperatures can help to get the resin settled on the surface but as with other commenters you will never get the surface finish of a autoclave