pH: Definition and measurement units. pH is a measure of how acidic/basic water is. The range goes from 0 - 14, with 7 being neutral. pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base. pH is really a measure of the relative amount of free hydrogen and hydroxyl ions in the water. Water that has more free hydrogen ions is acidic, whereas water that has more free hydroxyl ions is basic. Since pH can be affected by chemicals in the water, pH is an important indicator of water that is changing chemically.
sealing a cinder block wall. I just finished sealing the cinder block wall in our basement with Baer waterproofing paint. After the first coat I noticed little orange rust colored spots in one corner of the room. Nice fresh white coat of paint, little spots the size of peas on one wall.
Sealing and Waterproofing Block. Concrete or cinder blocks are commonly used to build buildings, masonry walls and foundations. Most block masonry installations are held together with cement mortar between the blocks. This mortar is the glue that holds the whole structure together. Unfortunately mortar is also very porous, and will quickly absorb water and moisture. Efflorescence is also a big problem on block.