ProSpec Moisture Vapor Reducer lowers the moisture vapor transmission rate of a concrete substrate by up to 80%, taking a substrate that emits 15 lbs. of moisture per 1000 sq. ft. in 24 hours to less than 3 lbs./1000 sq. ft. in 24 hours. The product is ideal where quick return to service is required. It can be applied to green concrete as little as 14 days old and features a rapid-drying formula that allows same-day flooring installation. Bonsal American. 800-738-1621.