Why does no one vacuum bag? You could put around 12 Psi or 1700 Pounds per square foot or al most 7000 lbs of pressure on that little patch you had there. Just need some bag, mastic, breather, & pref, coupled to a vacuum pump of a venturi deal, or in a pinch an onld refer compressor, or any compressor.

Sure think it beats bricks, and jugs.