Clear Waterproof Sealers for Masonry.

摘要

Ten clear waterproof masonry sealers were given an initial screening in the wind-driven rain test. Five passed the screening and were applied to masonry blocks which were exposed to marine atmospheres at Port Hueneme, California, and Kwajalein, Marshall Islands, for 2 years. Inspections were made after 1 and 2 years. After removal from test they were subjected to the wind-driven rain test described in Federal Specification TT-P-0035. Four systems exposed at Port Hueneme and three systems exposed at Kwajalein passed this test. However, when appearance is also considered, only one system was clean, smooth, and glossy after 2 years at Port Hueneme; two systems - one clean, smooth, and glossy, and the other, clean, smooth, and dull - had satisfactory appearance after 2 years at Kwajalein. In addition, two sets of coated blocks were stored at the Laboratory for 6 months to further coalesce before being exposed at Kwajalein. This procedure improved the waterproofing capability of one of the systems. (Author)