Moisture Barrier Concrete Sealer for WaterProofing
Product Announcement from KOSTER American Corporation
The KOSTER VAP I® 2000 is a one-coat 100% solids 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 resilient floor covering systems. The KOSTER VAP I® 2000 is in full compliance with VOC regulations.
The KOSTER 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.
The primary recommended use for the KOSTER 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 KOSTER 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 KOSTER 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.