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The KOESTER VAP I® 2000 is a one-coat system which consists of a unique combination of epoxy resins and other chemical substances. It is specifically formulated to overcome the poor long-term adhesion properties of most resin-based systems when curing in an environment of constant wetness, extreme alkalinity (pH 13–14) and water vapor drive. Because of its extreme density it is capable of reducing water vapor and moisture to levels acceptable for most coatings, adhesives and floor covering systems. (See Law Engineering test results.) The KOESTER VAP I® 2000 is in full compliance with VOC regulations.

The KOESTER VAP I® 2000 SYSTEM has excellent chemical and abrasion resistance and is compatible with most 100% solid epoxy and/or polyurethane based materials. ALWAYS TEST ADHESION PROPERTIES OF MATERIALS TO BE APPLIED ONTO VAP I® 2000 PRIOR TO APPLICATION. Before application of any material onto the KOESTER VAP I® 2000 SYSTEM, allow final coating to cure for a minimum period of 12 hours. This cure time is based on proper ventilation of entire work area during and after application. (See "environmental conditions.")

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Uses:
The primary recommended use for the KOESTER VAP I® 2000 SYSTEM is to solve the problems of alkalinity and moisture/water vapor emission through mineral-based substrates like concrete floors, floor underlayments (not containing gypsum), screeds etc., by reducing these vapors to levels that do not interfere with the adhesion of floor coverings. It provides an excellent base coat for most coatings and adhesives that cures fast and can be used indoors due to its low odor and no flammability.

The KOESTER VAP I® 2000 SYSTEM can be applied to concrete and other cement-based toppings that have been allowed to cure for a minimum period of 7 days. It is not pH sensitive in an alkaline environment. These unique properties allow the system to provide a solution as a base coat to pH/moisture/water vapor-sensitive coatings like polyurethane with regard to their long-term adhesion. It enables their application on relatively fresh cement-based substrates. Since conditions vary from job to job, it is recommended that a test area be coated and tested for water vapor transmission to assure proper performance of the system.

The KOESTER VAP I® 2000 SYSTEM is best used in an environment protected from UV rays and extreme thermal movement of the substrate. It is not a low modulus material and therefore cannot accommodate substrate movement commonly encountered in an outdoor environment. This limitation applies specifically to cracks. Cracks have to be repaired according to manufacturer's recommendation prior to the application of the KOESTER VAP I® 2000 SYSTEM. (Contact manufacturer for details.) Substrate should have a minimum compressive strength of 2500 p

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Surface Preparation:
The substrates to receive the KOESTER VAP I® 2000 SYSTEM have to be sound, clean, ABSORPTIVE and meet acceptable industry standards as defined in ACI Committee 201 report "Guide to Durable Concrete." Any kind of surface contamination like adhesives, coatings, curing compounds, efflorescence, dust, grease, oils, etc., have to be removed completely by sand or shot blasting to ICRI CSP 3 - 4 finish. However, for hard-trowled surfaces like aircraft hangers, blast to ICRI CSP-5. Smooth formed concrete surfaces like precast panels must be roughened if not absorptive to allow the KOESTER VAP I® 2000 SYSTEM to penetrate. Acid etching or grinding as surface preparation is not recommended.

In the event that surfaces are very uneven or have a rough texture, the use of a leveling underlayment might be beneficial. Consult with KOESTER AMERICAN first before using underlayment / repair mortars / screeds. It is essential that these materials are suitable for the use underneath vaporreducing systems. Test adhesion properties first before application. DO NOT apply KOESTER VAP I® 2000 onto surfaces that have been treated with any kind of concrete sealer prior to consulting with KOESTER AMERICAN CORPORATION. First make sure that the substrate surface does not deteriorate due to the presence of alkaline silica reactive substances or sulphurous compounds encountered in certain areas. Testing for concrete deficiencies and contaminates like A.S.R. (Alkaline Silica Reaction), un-reacted silicates, organic residue etc. is the responsibility of the Building Owner, and strongly recommended by Koester to avoid product failures.

Koester American Corp. strongly advises that surfaces to be treated with Koester material be inspected and evaluated by an experienced firm prior to the application of Koester Systems to determine its suitability to receive the VAP I® System.

ONLY a surface that REMAINS sound, clean, absorptive and free of any type of contamination is fit to receive the KOESTER VAP I® 2000 SYSTEMS. If self-leveling underlayments are to be used for any reason, ALWAYS APPLY KOESTER'S VAP 1® LEVEL-PRO SELF-LEVELING UNDERLAYMENT with LEVEL-PRO PRIMER E ON TOP OF KOESTER VAP I® 2000 SYSTEMS. Consult with KOESTER AMERICAN first before using underlayments / repair mortars / and screeds. Always follow underlayment manufacturers instructions and specifications.

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Test Results: