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Moisture penetration through concrete slabs can cause severe problems for subsequent flooring systems. High concentrations of moisture and alkalinity (levels determined through testing) can lead to the deterioration of flooring adhesives and delamination of coatings by osmotic action. Even with relatively low moisture emissions (MVER), elevated alkalinity can compromise even the toughest flooring system adhesives. To avoid this problem the concrete slab should be primed with a material that will tightly bond to the concrete under these very adverse conditions. KÖSTER VAP I 2000 is a special material which fulfils all of these functions; it has very low permeance (ASTM E96 wet: .04-.09), excellent bonding characteristics and is resistant to sustained high alkalinity (pH of 14). The KÖSTER VAP I 2000 vapor reduction system is applied to shot blasted, solid concrete substrates that are free of bond inhibiting substances. After curing, a covering layer (i.e. KÖSTER LF-VL) or any other type of final flooring may be applied. If an underlayment is required use KÖSTER SL Premium together with KÖSTER VAP I 06 Primer on top of the moisture mitigation system. Always adhere to the specifications in the respective Technical Guidelines.
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Vlaga u betonu može izazvati ozbiljne probleme za postojeće podne obloge. Zbog visoke koncentracije vlage i visoke pH vrijednosti (ustanovljene testiranjem) dolazi do oštećenja i odvajanja premaza i obloga uslijed visokog osmotskog pritiska. Čak i uz relativno nisku emisiju prolaska vlage (MVER), povišena pH vrijednost (alkalnost) može ugroziti i najotpornije podne sustave. Kako bi se izbjegla takva situacija, betonska ploča se mora tretirati temeljnim premazom kojeg karakterizira visoka prionjivost i otpornost na spomenute agresivne uvjete. KÖSTER VAP® I 2000 je specijalan materijal koji zadovoljava sve navedene uvjete: paronepropusan je (ASTM E96 mokar: 0.04-0.09), ima visoku prionjivost te otporan na visoke pH vrijednosti (do pH 14). KÖSTER VAP® I 2000 premaz se ugrađuje na prethodno sačmarenu betonsku podlogu, dobro pripremljenu, bez slabo vezivih dijelova koji mogu ugroziti prionjivost. Nakon sušenja, na premaz se može nanijeti epoksidna smola (npr. KÖSTER LF-VL) ili bilo koji tip podne obloge. Ukoliko je potrebno izravnanje podloge, na KÖSTER VAP® I 2000 se može nanijeti temeljni premaz KÖSTER VAP® I 06 Primer te cementna samonivelirajuća masa KÖSTER SL Premium. Uvijek se pridržavati uputa iz tehničkih listova materijala.