CMW 8000 Moisture Vapor Barrier is a clear, colorless spray applied penetrating lithium Potassium silicate blended system designed to stop concrete floor coatings and floor coverings from de-bonding due to hydrostatic vapor pressure coming up through a below grade concrete slab, on-grade slab and elevated deck slabs. This system stops hydrostatic pressure, capillary action and moisture migration by creating a negative and positive side moisture barrier.
The CMW 8000 is used prior to application of a floor coating or floor covering where excess moisture coming up through the concrete is a potential problem. The CMW 8000 may be painted, epoxied or stained over, and will accept concrete topping or mastics for floor tile etc. The CMW 8000 is also used in joint repairs prior to application of the 3246 Expansion Joint, our two Control Joint Fillers 3003 and 3004 to keep moisture from the joint repair.
CMW 8000 is a lithium potassium silicate blended sealer that with its small molecular structure, penetrates deep into the concrete slab. A reaction occurs between the lime and excess Portland cement, which is always present, and forms Calcium Silicate Hydrate (CSH). This process will encapsulate the moisture to create a permanent break in the capillaries of the concrete, stopping the passage of liquids and vapors through the concrete.
As a densifier, the CMW 8000 adds 20% – 40% increase in density to the concrete while increasing the strength of the cured concrete. CMW 8000 will purge alkalai salts and contaminents to the surface over a several day period and help eliminate existing effllorescnce problems from reocurring. It can also be combined with a water repellent treatment for superior protection.
CMW 8000 comes in both a Ready-to-Use and Concentrate version. The ready-to-use formula needs no mixing and can be used straight out of the container. The CMW 8000 concentrate version comes in a 5 gallon pail which makes 20 gallons & 55 gallon drum which makes 220 gallons of ready-to-use product (3:1 mix ratio – mix 3 gallons water with each 1 gallon concentrate).
For projects requiring a maximum level of moisture control or need to meet meet ASTM F3010 specifications for vapor permeance, consider using the CMW 8000 as the base level of protection followed up with a single coat application of the E1409CL Moisture Vapor Barrier Epoxy Primer or the MV2112 Moisture Vapor Barrier Epoxy Primer, The CMW 8000 adds additional protection to the E1409CL and MV2112, both of which meet the ASTM F3010 specification and can hold up 20 psi vapor pressure but in areas with significant moisture issues the CMW 8000 can help lower the potential risk of problems. The E1409CL and MV2112 would then be topcoated with your polymeric coating or resiliant flooring system.
