@Cameron Warech My vacuum system is a generic vacuum chamber and resin trap setup with a through-bag connector to apply pressure to parts evenly. A vacuum system is not necessarily necessary for hand-layup or pre-preg but it does allow for a superior reinforcement-matrix ratio for hand-layup and for debulking for pre-preg.

@Cameron Warech some people use a heat sealer like in food processing to form their vacuum parts, however, most consumer applications will use a vacuum bagging tape (like a wax) applied to a Flange on moulds (design consideration) which the vacuum bag material is pressed onto. The previously mentioned through bag connector draws the vacuum, which is why vacuum sealing is so important