I am building a water/moisture retaining wall to block moisture from the enclosed garage. I am using cinder blocks with masonary waterproofing paint. ** I want to also put two coats of some type of rubberized paint/coating on the blocks to put an extra protection against water/moisture seepage. Any recommendations? I have looked at the AUTOMOBILE rubberized Rustoleum spray and roofing silicone paint. Any recommendations on long lasting substance to use?