How-to videos on cleaning pavers and efflorescence now on National Masonry’s YouTube channel National Masonry National Masonry announces the launch of its own YouTube channel to display upcoming videos. National Masonry’s YouTube channel currently features two useful How-to videos on cleaning concrete pavers and cleaning efflorescence from masonry. Watch and learn How to Clean Pavers and How to Clean Efflorescence on National Masonry’s YouTube channel. More information on the subject is also available online on National Masonry’s Cleaning & Maintenance page.