The only accurate method for testing pH in concrete! A quick, easy, and convenient way to check the pH of many materials, including concrete. All you have to do is draw an "X" on the dry surface with the pencil, wet the "X" with distillled water, wait 15 seconds and compare the color of the "X" to the chart. It's that easy! (1/ctn)
SKU: pH TESTING PENCIL
$10.50