We manufacture concrete admixtures, penetrating concrete sealers, penetrating concrete floor sealers, flooring sealers, concrete waterproofers, brick sealers, block sealers, stucco sealers, plaster waterproofers, shotcrete waterproofers, gunite waterproofers, mortar sealers, concrete cleaners, and concrete repair products.

Materials

Transparent polyethylene sheet, commercially available, 18" x 18", minimum 10 mils thick, tape edges.

Ambient temperature must be AT LEAST 70⁰ F, OR 15⁰ F GREATER THAN THE SLAB TEMPERATURE, FOR A MINIMUM OF 30 DAYS PRIOR TO THE COMMENCEMENT OF TESTING. Any parting or curing compound must be removed a minimum of 30 days prior to testing as well. Any other conditions must be within the established parameters, as recommended by the manufacturer, for application of the coating, paint, surface treatment, or flooring system and adhesives. Protect test areas from direct sunlight and damage; reliability of test results will be affected. Clear membrane may be protected by covering with a protective cover such as cardboard, carpet, or rubber mat. Water to cement ratios greater than .54, or more, and curing or parting compounds will dramatically delay the proper hydration of the slab and chemical reaction of MOXIE 1500 CONCRETE SEALER. Refer to the MOXIE International publications, "Moisture Migration Table & Graphs". A visqueen vapor barrier will further delay the hydration process for several months.

Procedure

Tape a segment of clear visqueen membrane, approximately 18" x 18", tightly to the concrete surface making sure that all edges are sealed. Allow plastic sheet to remain in place a minimum of 72 hours, 7 days is preferred. Test areas may be left in place for one week or longer depending on time constraints. The use of a heat lamp is recommended to force moisture movement. After the allowed time has elapsed, visually inspect the clear membrane or Plexiglas, and note the presence, if any, of visible moisture or condensation. A dew point hygrometer may also be used for quantitative results. Do not confuse a clean area for a damp area. Duct tape will remove surface dusting and appear lighter, making the area under the membrane appear darker by comparison. Upon removal, there should be no visible condensation, dampness, discoloration or an odor of dampness from the slab under the test membrane areas. The presence of the membrane will protect that area from dust and dirt and appear darker.

Floors - One test area per 500 square feet (46 square meters) or portion thereof, of surfaces unless otherwise specified.

Walls and ceilings - One test area per 500 square feet (46 square meters) or portion thereof, of surface area unless otherwise specified. The recommended practice is a minimum of one test for each 10 feet (3 meters) of vertical rise in all elevation starting within 12 in. (300 mm) of the floor.

Form Requirements

Certifying Signature __________________________________ Date ______________

Test Method for Indicating Moisture in Concrete (cont.) Page __ of ___

Test Method for Indicating Moisture in Concrete (cont.) Page __ of ___