All cleaning methods should be trialed on a small area to make sure there are no adverse reaction to the blocks
At Apex Masonry we recommend sealing your finished project. There is a vast amount of sealers to choose from. As sealers can alter the appearance of the block we recommend you talk to a paint professional about the desired finish you want. Two basic questions you should ask yourself is do you want a natural sealer that will not change the look of your blocks or do you want to enhance the color of your project by giving it a ’wet look’ finish.