The Backstory -
Back in 1998, the Environmental Protection Agency "legislated" it's way clear of all the high Volatile Organic Compounds (VOCs) in all paints, sealants, coatings, and ADHESIVES. The days when your choice of adhesives were in the 10,000s parts per million of VOCs are gone. Today, adhesives are up to 50% water and contain only 100-300 parts per million of VOCs. The least bit of moisture, in the form of vapor or mist (think of water passing through a semi-permeable object) moves up from either the sub-base (mother earth) and/or from within the concrete itself (17 gallons plus per cubic yard of "extra mix" water) to the surface and "re-wets" the adhesive. The damage is seen in blisters, bubbles, ripples, delaminations, etc. in the flooring and is responsible for over a billion dollars each year in failures. That same moisture/ vapor feeds the growth of mold and bacteria, destroys indoor air quality and corrodes every circut board (computers!) in the environment.
MVRA - MOISTURE VAPOR REDUCING ADMIXTURE
ASTM C494 Type S Admixture
MasterFormat Involving Vapor Lock
03 00 00 Concrete -
03 30 00 Cast-in-Place Concrete
03 40 00 Precast Concrete
03 50 00 Cast Decks and Underlayment
07 00 00 Thermal and Moisture Protection -
09 00 00 Finishes -
09 60 00 Flooring
09 70 00 Wall Finishes
09 90 00 Painting and Coating
Vapor Lock 20/20 is a complex solution containing various Nano-Silicas that work with the cement and "extra" mix water to produce additonal calcium silicate hydrate (C-S-H) that floods the cement matrix and virtually eliminates the capillary system so detrimental to concrete. The chemical formula for cement hydration (tricalcium silicate + water - 50% of total cement hydration) is below -
2 Ca3SiO5 + 7 H2O ---> 3 CaO.2SiO2.4H2O + 3 Ca(OH)2 + 173.6kJ
As you can see from the chemical equation above, water is always present within the concrete. Our concern is not the presence of that moisture, but the movement of that moisture to the surface of the concrete.
Vapor Lock 20/20 is sold through the commercial ready-mix concrete producers and is a critical material listed on the certified "Batch Ticket". Vapor Lock is dosed in the beginning of the mixing process (goes in with the head waters) and is added according to the amount of cement and fly ash in your mix - an automatic process of protection that can't be misplaced or misinstalled.
The Vapor Lock technology is truly legitimate and can be seen in the results with millions of square feet of beautiful flooring adhered to Vapor Lock concrete throughout North America - with hundreds of thousands of square feet down here in Southern California. Every kind of expensive moisture "in-sensitive" flooring has been adhered to Vapor Lock Concrete flawlessly with a 10-Year Plus Performance Warranty & $16,000,000 Project Specific Insurance Policy hanging over it!
We have every kind of flooring and coating imagineable installed over Vapor Lock enhanced concrete - in perfect service to date.....and we'd love to share the results with you. Vapor Lock 20/20 can be budgeted at the eleven cents ($0.11) a sqaure foot, per inch of concrete thickness, installed, range.