Pre-preg can be used with any type of mould design but the fabric still needs to be compressed to ensure maximum strength. The required pressure depends on the type of pre-preg fabric and resin used and can be more than one atmosphere (around 15psi), the pressure of a full vacuum. Therefore, some pre-pregs require additional moulding techniques, such as inflation bladders and compression moulds. Some pre pregs can also be cured in an autoclave, essentially a pressurised oven.
Prep-preg replaces the dry fabric used in the other techniques described on this website it is not a technique in of itself. However, because there is no need to add resin to pre-preg fabric it is possible to use it in more advanced technique, some of which are described briefly here