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<br />Table 1 <br /> <br />Coatings <br /> <br />Material <br /> <br />Clear water- <br />repellents <br /> <br />Coating <br />No. <br /> <br />Comments <br /> <br />1 <br /> <br />Repelled rainwater well. Sealed <br />some small openings against 1 to <br />2 ft of water head, but did not <br />seal brick or block walls against <br />1 to 2 ft of water head. <br /> <br />Clear water- <br />repellents <br /> <br />2 <br /> <br />Clear water- <br />repellents <br /> <br />3 <br /> <br />Cementitious <br />materials <br /> <br />4 <br /> <br />Expansive. hard to apply. Sealed a <br />brick-veneer wall against 2 ft of <br />water head but cracked and failed <br />after 3 months. <br /> <br />Cementitious <br />materials <br /> <br />5 <br /> <br />Relatively inexpensive, good bond, <br />good crack resistance, and was <br />still effective after 4 years <br />of use. <br /> <br />Cementitious 6 <br />materials <br />Cementitious 7 <br />materials <br />Cementitious 8 <br />materials <br />Epoxy 9 <br /> <br />Good bond but cracked after 3 years <br />of use. <br /> <br />Cracked and peeled from brick <br />surface after 3 years of use. <br /> <br />Good bond and was still effective <br />after 4 years of use. <br /> <br />Not effective in sealing a brick <br />wall against 1 to 2 ft of water <br />head. <br /> <br />Epoxy <br /> <br />10 <br /> <br />Polyurethane <br /> <br />11 <br /> <br />Not effective in sealing a brick <br />wall against 1 to 2 ft of water <br />head. <br /> <br />Asphalt <br /> <br />12 <br /> <br />Only reliable if good workmanship <br />is used and an impermeable <br />barrier is embedded in the <br />asphalt. <br />