[Video] Part Making

Step 8 Peel off Bag Release and Breather

To apply even pressure, the tool is lined with a breather material - much like the innards of a soft blanket. To prevent this breather from sticking, a plastic release film is placed in the tool on top of the glass. This film is basically a plastic wrap with holes (t allow resin through).

Roll out this plastic film to cover every square inch. Folds are nothing to worry about - just get everything covered. If you need to overlap pieces due to size - give yourself about six inches.

Now unroll your breather material. Your breather should NOT have any folds in it - if you need to, use tape to keep it in place. If you need to use more than once piece to cover the entire tool - you can overlap, just keep it to a minimum.

Finally, make sure some breather goes well over the flange - this will provide a location to mount the vacuum port and valve.