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HM-674 Moisture Emission Test Kits provide a widely accepted method for determining moisture emission through concrete floor slabs and can prevent significant financial loss from damage to coatings and flooring systems each year because of moisture migration. While an electronic moisture meter can indicate the existing degree of saturation, it does not determine the rate of moisture emission – and these test kits do in accordance with ASTM F1869.
The test kit consists of a sealed calcium chloride dish and a plastic dome with a pre-installed butyl rubber gasket. Three pH test strips with the color chart are also included. A container of moisture-absorbing calcium chloride is weighed and placed under a plastic “dome” that is sealed to the concrete surface with a self-adhering gasket. The dome should be undisturbed with no exposure to sunlight for the 60 to 72-hour test period. At the end of the test cycle, the plastic is cut open and the dish of calcium chloride is removed, sealed and immediately weighed. The weight gain and exposure time values are used to compute the test result, expressed in pounds of moisture emitted per 1,000 square feet in 24 hours. Recommended test frequency is three for the first 1,000 square feet and one test for each additional 1,000 square feet of total area.
HM-674B is a package of 12 kits; HM-674D includes 3 test kits. Moisture Meters and pH Meters are available for a complete evaluation of the concrete floor surface moisture.
HM-674B: 12 kits/pkg
HM-674D: 3 kits/pkg
HM-674B: 5.0lb (2.27kg)
HM-674D: 2.0lb (0.91kg)
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