The Zimac hot bonder can control an aluminum layer, cut from sheet stock, and placed just under the bag and above the patch providing a quick method to obtain your cure. Cells are positioned on predefined centres; a uniform temperature profile is easily achieved of any size or shape desired. This is quickly done without resorting to buying a special blanket. Illustrated here is 12 inch diameter aluminum tile providing a resulting uniform temperature across a simulated 10 inch diameter patch on the the Carbon Graphite/Nomex fan cowl piece.

A thermal survey of the F16 fin with a 16 x 16 inch tile/caul and four strip heaters providing perimeter heat on the tile, cells on stringers around the simulated patch and cells on the rear side produced a 250 Fahrenheit +/- 10 degree across the 14 x 14 inch simulated repair. Click image to enlarge.