# Anyone have experience with fiberglass?

**URL:** <https://forums.speedlife.net/t/anyone-have-experience-with-fiberglass/16956>\
**Category:** NYSpeed Automotive\
**Created:** [September 4, 2006, 7:34pm UTC](https://forums.speedlife.net/t/anyone-have-experience-with-fiberglass/16956 "2006-09-04T19:34:54Z")\
**Posts on this page:** 1\
**Showing post:** 22

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**Author:** ![LAFENGAS](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/lafengas/32/7573_2.png) [@LAFENGAS](https://forums.speedlife.net/u/LAFENGAS)\
**Post date:** [September 5, 2006, 3:48pm UTC](https://forums.speedlife.net/t/anyone-have-experience-with-fiberglass/16956/22 "2006-09-05T15:48:59Z")

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> [@fairgentleman Z](#):
>
> What exactly does the vacuum bag do?
> 
> Just sucks all the air out and puts 1 atm evenly over the whole peice, thus requiring less adhesive (epoxy/resin) to bond the layers?

correct. Greatly reduces the epoxy weight and it forces the weave tighter together making it much stronger. Also, with semi-complex parts, it helps actually force form the composite to the shape of your mold.

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